Composition for combined detoxification, bactericidal treatment, and dehelmintization of waste disposal plant sediments, method of preparation thereof, and a method for combined detoxification, bactericidal treatment, and dehelmintization of waste disposal plant sediments

FIELD: waste treatment.

SUBSTANCE: invention provides water-based composition for above-defined objectives, which contains (i) hydrates of sodium or potassium salts of amino acid mixtures obtained via alkali-assisted water-and-heat treatment of wastes comprising animal proteins (10.2-15.3%), (ii) copper or zinc complexes of hydrates (15.5-20.5%), and (iii) alkali (0.16-0.25%). Methods for preparation of this composition and for combined detoxification, bactericidal treatment, and dehelmintization are also disclosed.

EFFECT: facilitated treatment of waste disposal plant sediments.

3 cl, 4 ex

 

The invention relates to the production of a composition for combined detoxification, disinfection and de-worming sewage sludge of wastewater treatment plants and can be used in the system of housing and communal services in cities and rural settlements.

Sewage sludge treatment facilities, even past biothermal and biological treatment and stored on the sludge treatment facility sites, are a source of chemical and biological hazards, as they contain significant amounts of cations of heavy metals, pathogens, helminth eggs.

Known composition for detoxification precipitation treatment facilities containing hydrates of sodium or potassium salts of a mixture of amino acids, alkalis, and water (Friedman YA and other Organo-mineral composition based on sewage sludge sewage treatment plants. Non-commercial partnership "Chemical engineering research center", M., 2000, p.75-87) [1].

However, the effectiveness of this famous composition is not high enough.

A method of obtaining reagent for bactericidal treatment and deworming precipitation treatment facilities, which is an aqueous solution of alkali and copper or zinc complexes of a mixture of amino acids with copper or zinc salts of inorganic acids [1].

However, for p the receipt of reagent data in a known manner using expensive drugs - individual amino acids, which reduces the availability of the reagent.

There is a method of detoxification precipitation treatment plants by extracting heavy metals from sediments cation exchange or complexing reagents (Agronomic RA Problems treatment and disposal of wastewater sludge. Water supply and sanitary equipment. 1995. No. 1. C.2-3) [2].

However, this known method is provided by the use of expensive reagents for detoxification, high complexity and large energy consumption.

There is a method of detoxification precipitation treatment facilities by their processing detoxifier [1].

As a detoxifier in this known method uses a composition comprising hydrates of sodium or potassium salts of a mixture of amino acids, lye and water.

However, the efficiency of this known method is not high enough.

There is a method of disinfecting and deworming precipitation WWTP thermophilic digestion sludge digesters or heat treatment at temperatures up to 100° (Turov I.S. the Treatment and disposal of sludge of municipal wastewater. M.: stroiizdat, 1988. 256 S.) [3].

However, the effectiveness of this method is low: at high energy cost is not achieved complete destruction of pathogenic organisms and helminth eggs.

Known sporobacterin treatment and deworming precipitation treatment facilities water-soluble salts of Ag, Cu, Zn, high biocidal activity (Oiental, Ven. Reducing the human impact on the environment and in water treatment technologies using ion bacteriostatic nature. Scientific and technical aspects of environmental protection. Survey information. Issue 5, VINITI, M., 2003, p.85-90) [4].

The disadvantage of this known method is the necessity to use for disinfection of significant quantities of reagents, which is economically inefficient. In addition, disinfectant activity is most effective at relatively high temperatures (30°C and above).

The known method bactericidal treatment and deworming precipitation treatment facilities reagent in aqueous alkali solution and copper or zinc complexes hydrate mixture of amino acids [1].

There is a method, which provides both detoxification and bactericidal treatment and deworming precipitation treatment facilities by sequential treatment of sludge treatment facilities detoxifier, and then the reagent in the form of an aqueous solution of alkali and copper or zinc complexes hydrate mixture of amino acids [1].

However, the effectiveness of this method is not high enough: the use of expensive reagents and the need to consistently use the two reagents.

The technical result achieved by the present invention is to increase the effectiveness of detoxification, antibacterial treatment and deworming precipitation treatment facilities through the use of a composition that combines the functions as a detoxifier and reagent with biocidal action, providing a combined detoxification, antibacterial treatment and deworming precipitation treatment plants for disinfection and neutralization and subsequent utilization as soil-improving additives or organo-mineral fertilizers.

This technical result is achieved in that the composition for combined detoxification, antibacterial treatment and deworming precipitation treatment facilities contains hydrates of sodium or potassium salts of a mixture of amino acids obtained by water-heat treatment in the presence of alkali wastes containing animal proteins, copper or zinc complexes of the above hydrates of sodium or potassium salts of a mixture of amino acids, water and lye, in the following ratio, wt.%:

hydrates of sodium or potassium salts of a mixture of amino acidsof 10.2 and 15.3
copper or zinc complexes of sodium hydrate or
potassium with whom she mixtures of amino acids 15,5-20,5
lye0,16-0,25
waterrest

Achieved the specified technical result is also the fact that the method of obtaining a composition for combined detoxification, antibacterial treatment and deworming precipitation treatment facilities provides for water-heat treatment in the presence of alkali wastes containing animal proteins, and mentioned waste, water and alkali are mixed in a ratio 1:(1,8-2,0):(0,38-0,46), the mixture is subjected to the aforementioned processing at a temperature of 160-180°C for 25-30 min to get the first product in the form of an aqueous solution of hydrate of sodium or potassium salts of the amino acid mixture, then some of the obtained product is subjected to interaction with copper or zinc salts of inorganic acids to produce the second product in the form of an aqueous solution of copper or zinc complexes of hydrates of sodium or potassium salts of the amino acid mixture, after which the aforementioned first and second products are mixed in a ratio (0.5 to 1):1, add an aqueous solution of sodium hydroxide, in an amount necessary to maintain the alkalinity of the composition in a molar ratio to sterilizing reagent 1:(0,05-0,08) to obtain the target product.

This technical result is achieved that the same topics that way combined detoxification, antibacterial treatment and deworming precipitation treatment facilities provides for the use of the reagent in the form of a composition according to claim 1, having first determined the content of ions of each of the heavy metals in the treated sludge, the quantity of the reagent is determined on the basis of the mathematical expression 1

where V is the volume of 1 M solution composition, l/m3;

m is the metal content in need of detoxification, the sediment in terms of absolutely dry matter of sludge, g/kg

Additionally estimate the length of the sludge bed, the width of the sludge bed, the depth of the sediment layer, the density of wet sediment, the cake moisture, the specific dose of reagent equal to 10 mmol/kg of dry matter of sludge, the distance between the input points of the reagent.

The reagent consumption is re-determined on the basis of the mathematical expression 2

where- the consumption of the reagent solution on one silt pad, l;

l is the length of the sludge bed, m;

b - the width of the sludge bed, m;

h - the depth of the sediment layer, m;

ρvlachikathe density of wet sediment, kg/m3;

Wabroadco- humidity treated sludge, %;

- specific dose equal to 10 mmol of reagent/kg and is absolutely dry matter sludge

the reagent consumption is one point of entry is calculated on the basis of the mathematical expression 3

where- consumption input reagent on one input, l;

s - distance between the input points, m;

h - the depth of the sediment layer, m;

ρvlachikathe density of wet sediment, kg/m3;

Wabroadco- humidity treated sludge, %;

- specific dose equal to 10 mmol of reagent/kg of absolutely dry matter sludge

the reagent consumption is one point of entry is calculated on the basis of the mathematical expression 3

where- consumption input reagent on one input, l;

s - distance between the input points of the reagent, m;

h - the depth of the sediment layer, m;

ρvlachikathe density of wet sediment, kg/m3;

Wabroadco- humidity treated sludge, %;

- specific dose equal to 10 mmol of reagent/kg of absolutely dry matter sludge

and spend the reagent in an amount which corresponds to a larger value of the two values calculated from the mathematical expressions 1 and 2, the reagent is used with an excess of 20-30% relative to the calculated amount, spending it on one the place you enter in the quantity calculated from the mathematical expression 3.

Below are examples illustrating the invention.

Example 1. In a reactor with a capacity of 250 l load 108 liters of water, portions 3 kg type of 22.8 kg of sodium hydroxide and then 60 kg of waste containing animal proteins (membrane wet and dry collection of fur and leather industries, waste sorting skins and substandard fur and leather raw materials, waste of hair ventilation and other types of collection in the primary processing of wool, tan hides, the production of felted items made from natural hair, waste of down and feathers poultry farms, not recyclable flap and scraps in the manufacture of products made of wool, fur and leather), ramming them if necessary. The ratio of waste : water : lye is 1:1,8:0,38. Open the steam wand, heated the reaction mass prior to the circulation pipeline, feeding steam into the expansion capacity-fridge, and on the pipeline, which returns the condensate to the reactor. The process is conducted at a temperature of 160°C. At full steam withstand a lot in the state of the circulation within 15 minutes. Shutting off the steam supply to the reactor and incubated for 15 minutes after cessation of circulation. Razborchivaya the cover of the reactor, add water until total volume of the reaction mass 200 l and stirred the mass for 15 minutes the reaction is Poured m the SSA through the filter in the decanter. Get a 2 M aqueous solution of the first product with an average molecular weight 136 and the content of free alkali 0.08 mol/L.

The resulting hydrolysate was loaded into a 40 l tank with a capacity of 200 l with a wide open throat, with the lower slope with a crane, equipped with a mechanical stirrer. Then under stirring for 10-15 min at a temperature of 18°added 18 kg of copper chloride and then with continuous stirring 4.5 kg of sodium hydroxide (portions 300 g) for 20-30 minutes, the Volume of the reaction mass was adjusted with water to 100 l and stirred for 15 minutes Take a sample and determine the pH of 9.3. Get 100 l of the second product with content complex salts of copper and 1.0 mmol/l and a hydroxyl ratio of 0.9.

In a vessel with stirrer mix 50 l of the first and second components (1:1) at a temperature of 18°C for 20 min with continuous stirring and add 0.5 l of 42%aqueous solution of sodium hydroxide. Get a composition with a content (wt.%) hydrates of sodium salts of a mixture of amino acids 15,3, copper complexes of hydrates of sodium salts of a mixture of amino acids 15.5 and of sodium hydroxide 0,16.

Example 2. In a reactor with a capacity of 250 l load 120 l of water, portions of 2 kg type of 27.6 kg of sodium hydroxide and then 60 kg of waste containing animal proteins (Mezdra leather industry, substandard fur, kouwen the e raw materials), ramming them if necessary. The ratio of raw materials : water : lye is 1:2,0:0,46. Open the steam wand, heated the reaction mass prior to the circulation pipeline, feeding steam into the expansion capacity-fridge, and on the pipeline, which returns the condensate to the reactor. The process is conducted at a temperature of 180°C. At full steam withstand a lot in the state of the circulation within 15 minutes. Shutting off the steam supply to the reactor and incubated for 10 minutes after cessation of circulation. Razborchivaya the cover of the reactor, add water until total volume of the reaction mass 200 l and stirred the mass for 15 minutes Pour the reaction mass through the filter in the decanter. Get a 2 M aqueous solution of the first product with an average molecular weight 136 and the content of free alkali 0,075 mol/L.

The resulting hydrolysate was loaded into a 40 l tank with a capacity of 200 l with a wide open throat, with the lower slope with a crane, equipped with a mechanical stirrer. Then under stirring for 10-15 min at a temperature of 18°added 18 kg of zinc chloride and then with continuous stirring 4.5 kg of sodium hydroxide (portions 300 g) for 20-30 minutes, the Volume of the reaction mass was adjusted with water to 100 l and stirred for 15 minutes Take a sample and determine the pH of 9.3. Get 100 l of the second product with the content of the m complex salts of zinc and 1.0 mmol/l and a hydroxyl ratio of 0.9.

In a container with a stirrer load 25 l of the first and 50 l of the second product (0,5:1) at a temperature of 18°C for 20 min with continuous stirring and add 0.65 l 42%aqueous solution of potassium hydroxide. Get a composition with a content (wt.%) hydrates of sodium salts of a mixture of amino acids 10,2, zinc complexes, hydrates of sodium salts of a mixture of amino acids 20,5 and potassium hydroxide 0,25.

Example 3. In a reactor with a capacity of 250 l load 124 liters of water, portions of 2 kg add 24,8 kg of potassium hydroxide and then 62 kg waste containing animal proteins (hair feathering cloth-woollen manufacture), ramming them if necessary. Open the steam wand, heated the reaction mass prior to the circulation pipeline, feeding steam into the expansion capacity-fridge, and on the pipeline, which returns the condensate to the reactor. The process is conducted at a temperature of 180°C. the Ratio of waste : water : lye is 1:2,0:0,40. At full steam withstand a lot in the state of the circulation within 15 minutes. Shutting off the steam supply to the reactor and incubated for 10 minutes after cessation of circulation. Razborchivaya the cover of the reactor, add 85 l of water (to a total volume of the reaction mass 200 l) and stirred the mass for 15 minutes Pour the reaction mass through the filter in the decanter. Get a 2 M aqueous solution of the first about the ukta with an average molecular weight of 129 and a content of free alkali 0.05 mol/L.

The first product was loaded into a 50 l capacity with a capacity of 200 l with a wide open throat, with the lower slope with a crane, equipped with a mechanical stirrer. Next, under stirring for 15 min was added to 18.0 kg of copper nitrate and 6 kg of potassium hydroxide (portions 300 g) for 45 minutes, the Volume of the reaction mass was adjusted with water to 100 l and stirred for 15 minutes Take a sample and determine the pH to 10.5. Get 100 l of the second product with content complex salts of copper and 1.0 mmol/l and a hydroxyl coefficient of 0.95.

In a container with a stirrer load 42 l of the first and 60 l of the second product (0.7:1) at a temperature of 18°C for 20 min with continuous stirring and add 0.6 l 42%aqueous solution of potassium hydroxide. Get a composition with a content (wt.%) hydrate potassium salts of the amino acid mixture of 12.8, zinc complexes hydrate potassium salts of the amino acid mixture of 18.2 and potassium hydroxide 0,18.

Example 4. Sediment hosted on silt map with humidity 61% in the amount of 100 tons (highlighted part of the sludge beds), treated irrigation composition of example 1. According to the chemical analysis of the sediment contained (mg/kg dry matter): Cu 785, Zn 1430, Ni 270, Cr 533, Pb 128, Cd 92, Co 15. Total microbial colonization of 107-109. Helminth eggs are viable, 50 pieces/kg.

Irrigation surface sediment were what omashu distributing device, roaming on the limits of the sludge bed. Distributing the device is a pipe with nozzles mounted above the surface of the sediment; pipe length equal to the width of the platform.

Treatment sludge treatment facilities is performed after performing the following measurements: l=10 m, b=10 m, h=1 m, ρvlachika=1.2 kg/m3, W=61%,.

The required amount of the composition according to mathematical expression 1 amounted to 636 l 1 M solution. The required amount of the reagent according to mathematical expression 2 was 100 l of 1 M solution. Processing spent 826 l (1,3-fold excess) of 1 M solution compositions for 18 hours. The processed portion of the sludge beds survived for 20 days, periodically measuring pH. By day 15 the pH reached a value of 7.6 and has not been further decreased. According to the bacteriological and parasitological analysis and biological testing (according to the Order of MNR of the Russian Federation of 15 June 2001 No. 511) of the obtained organo-mineral composition is non-toxic to living organisms, does not contain pathogenic organisms and viable helminth eggs and is a substance hazard class 4. In accordance with GOST R 17.4.3.07-2001 it can be used to restore the productivity of disturbed land for forestry and recreational areas rekultivace and, and also as raw material for the preparation of organic fertilizer by composting and vermicomposting.

Similar results were obtained when using the compositions of examples 2-3.

Thus, the composition according to the invention obtained by the method according to the invention, provides an effective combined detoxification, antibacterial treatment and deworming precipitation treatment facilities.

1. Composition for combined detoxification, antibacterial treatment and deworming precipitation treatment facilities containing hydrates of sodium or potassium salts of a mixture of amino acids obtained by carrying out the water-heat treatment in the presence of alkali wastes containing animal proteins, copper or zinc complexes of the above hydrates of sodium or potassium salts of a mixture of amino acids, water and alkali in the following ratio, wt.%:

Hydrates of sodium or potassium salts of a mixture of amino acidsof 10.2 and 15.3
Copper or zinc complexes of sodium hydrate or
potassium salts of a mixture of amino acids15,5-20,5
Lye0,16-0,25
WaterRest

2. A method of obtaining a lump is osili for simultaneous detoxification, bactericidal treatment and deworming precipitation treatment facilities, providing for water-heat treatment in the presence of alkali wastes containing animal proteins, and mentioned waste, water and alkali are mixed in a ratio 1:(1,8-2,0):(0,38-0,46), the mixture is subjected to the aforementioned processing at a temperature of 160-180°C for 25-30 min to get the first product in the form of an aqueous solution of hydrate of sodium or potassium salts of the amino acid mixture, then some of the obtained product is subjected to interaction with copper or zinc salts of inorganic acids to produce the second product in the form of water solution of copper or zinc complexes of hydrates of sodium or potassium salts of the amino acid mixture, after which the aforementioned first and second products are mixed in a ratio (0.5 to 1):1, add an aqueous solution of sodium hydroxide in an amount necessary to maintain the alkalinity of the composition in a molar ratio to sterilizing reagent 1:(0,05-0,08) to obtain the target product.

3. The method combined detoxification, antibacterial treatment and deworming precipitation treatment facilities, involving the application of the reagent, characterized in that as a reagent using a composition according to claim 1, pre-determine the content of ions of each heavy metal is s in the treated sludge, the amount of the reagent is determined on the basis of the mathematical expression 1

where V is the volume of 1 M solution composition, l/m3;

m is the metal content in need of detoxification, the sediment in terms of absolutely dry matter of sludge, g/kg,

additionally determine the length of the sludge bed, the width of the sludge bed, the depth of the sediment layer, the density of wet sediment, the cake moisture, the specific dose of reagent equal to 10 mmol/kg of absolutely dry matter of sludge, the distance between the input points of the reagent;

the reagent consumption is re-determined on the basis of the mathematical expression 2

where- the consumption of the reagent solution on one silt pad, l;

l is the length of the sludge bed, m;

b - the width of the sludge bed, m;

h - the depth of the sediment layer, m;

ρvlachikathe density of wet sediment, kg/m3;

Wabroadco- humidity treated sludge, %;

- specific dose equal to 10 mmol of reagent/kg of absolutely dry matter of sludge, the flow rate of the reagent on one point of entry is calculated on the basis of the mathematical expression 3:

where - consumption input reagent on one input, l;

s - distance between the input points of the reagent, m;

h - the depth of the sediment layer, m;

ρvlachikathe density of wet sediment, kg/m3;

Wabroadco- humidity treated sludge, %;

- specific dose equal to 10 mmol of reagent/kg of absolutely dry matter sludge

and spend the reagent in an amount which corresponds to a larger value of the two values calculated from the mathematical expressions 1 and 2, the reagent is used with an excess of 20-30% relative to the calculated amount, spending it on one place enter in the amount, calculated on the basis of the mathematical expression 3



 

Same patents:

FIELD: tanning industry; medicine; methods of production of the protein hydrolyzate.

SUBSTANCE: the invention is pertaining to the field of tanning industry, in particular, to the method of production of the protein hydrolyzate and may be used at the treatment of the tanning industry raw wastes for utilization as the fodder additive in the cattle ration, as the fertilizer and in medicine - at production of the cosmetics. The wastes of tanning rawstock are subjected to the alkaline-peroxide treatment in the water solution of sodium hydroxide and hydrogen peroxide at their consumption accordingly 2.0-3.0 % and 1.6-1.8 % from the mass of the wastes. Then conduct hydrolysis using Savinaz enzyme preparation produced from the generically modified cultivation of Bacillus. Hydrolysis is conducted at presence of ammonium sulfate at the consumption of the enzyme preparation and the ammonium sulfate accordingly as 02-2.0 % and 1.3-1.5 % from the mass of the wastes. The method allows to improve the quality of the protein hydrolyzate and to expand the field of its application.

EFFECT: the invention ensures improvement of the quality of the protein hydrolyzate and expansion of the sphere of its application.

1 tbl, 5 ex

FIELD: ecology, chemical technology.

SUBSTANCE: invention proposes a method for preparing a reagent used in detoxification of deposits in cleansing constructions. Method involves an aqueous-thermal treatment of waste comprising animal proteins in the presence of alkali. Waste, water and alkali are taken in the ratio = 1:(1.8-2.0):(0.38-0.46), respectively, and treatment is carried out at temperature 160-180°C for 25-30 min to obtain the end product consisting of an alkali solution and mixture of sodium or potassium hydrate salts of amino acids. For treatment of cleansing sewage water deposits the measurement of the necessary amount of reagent is carried out with taking account the concentration of each heavy metal as a component of the deposit. Method provides preparing the effective agent for detoxifying the cleansing construction deposits and reducing the consumption of reagent in carrying out the detoxification of deposits of cleansing constructions.

EFFECT: improved preparing method, enhanced effectiveness of detoxification.

3 cl, 4 ex

FIELD: polymer materials.

SUBSTANCE: sheet porous collagen-containing material, suited to be used in footwear, furniture, and vehicle manufacture, comprises water-soluble plasticizer and particles of hydrophilic filler in the form of fibers with length-to-diameter ratio between 5 and 500. At least 50% of fibers are parallel to sheet sides with largest surface areas. This sheet is characterized by rupturing relative elongation when stretched in one direction in planes of the largest sides equal to 10-30%, modulus of compression elasticity for thickness equal to 50-300 kPa, and coefficient of thickness restoration after 70% compression for 5 h equal to 0.90-0.95 at 8-12% moisture. Also described is method of manufacturing such material including following operations: mixing hydrophilic fibers having length-to-diameter 5-500 with aqueous collagen solution and multifunctional cross-linking agent to form homogenous mass containing 1-20% fibers, 1-5% collagen, and 0.2-20% cross-linking agent; freezing liquid sheet and unfreezing it followed by pressing resulting porous sheet; softening with water-soluble plasticizer; second pressing; and drying.

EFFECT: enhanced damping ability of sheet and simplified manufacturing technology.

8 cl, 2 tbl, 10 ex

The invention relates to the leather industry, and in particular to methods of fibrous porous materials from tannery wastes and can be used in the manufacture of footwear, leather goods and upholstery
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The invention relates to the chemistry and technology of high-molecular natural compounds, namely, to a method for producing a collagen-alginate material, and can be used in medicine as a coating for wounds and burns and t

The invention relates to the leather industry, specifically to a method for producing porous materials on the basis of tannery wastes and substandard raw materials
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FIELD: ecology, chemical technology.

SUBSTANCE: invention proposes a method for preparing a reagent used in detoxification of deposits in cleansing constructions. Method involves an aqueous-thermal treatment of waste comprising animal proteins in the presence of alkali. Waste, water and alkali are taken in the ratio = 1:(1.8-2.0):(0.38-0.46), respectively, and treatment is carried out at temperature 160-180°C for 25-30 min to obtain the end product consisting of an alkali solution and mixture of sodium or potassium hydrate salts of amino acids. For treatment of cleansing sewage water deposits the measurement of the necessary amount of reagent is carried out with taking account the concentration of each heavy metal as a component of the deposit. Method provides preparing the effective agent for detoxifying the cleansing construction deposits and reducing the consumption of reagent in carrying out the detoxification of deposits of cleansing constructions.

EFFECT: improved preparing method, enhanced effectiveness of detoxification.

3 cl, 4 ex

FIELD: inorganic chemistry, chemical technology.

SUBSTANCE: method for preparing calcium molybdate involves treatment of the parent potassium molybdate solution with calcium nitrate taken in the stoichiometrically necessary amount and with addition of nitric acid wherein its mass ratio to potassium carbonate containing in the parent solution is 0.90-0.96. Invention provides the extraction degree of molybdenum-containing solutions up to 99.2% and to obtain calcium molybdate without formation of waste. Invention can be used in hydrometallurgy of rare metals in processing molybdenum-containing solutions.

EFFECT: improved preparing method.

1 tbl

FIELD: environmental protection; methods and devices for the waste waters sediment heating up for the anaerobic stabilization in the methane-tanks.

SUBSTANCE: the invention is pertaining to the field of the biological purification of the waste waters, in particular to anaerobic stabilization of the sediments in the methane-tanks for the waste waters purification facilities with the productivity of more than 50-100 thousand m3/day at the mesophilic (32-35°C) and the thermophilic (52-55°C) temperature modes. For the sediment heating up and its anaerobic stabilization in the methane-tank the raw sediment is loaded in the methane-tank, the partially stabilized sediment is withdrawn from the methane-tank, heat with the steam in the injector and after that load again in the methane-tank. At that the source steam is divided in the separator into the condensate and the dry steam. The crude sediment is loaded in the methane-tank after its mixing with the partially stabilized sediment and the condensate produced at separation of the source steam. The mixture including the partially stabilized sediment, the crude sediment and the condensate is heated up by the dry steam, which is fed to the inlet of an injector with the possibility of the flow control. The heating device of sediment for anaerobic stabilization in the methane-tank contains the methane-tank, the pipeline of the crude sediment feeding, the injector, the injector intake pipeline and the pressure pipeline, the source steam feeding pipeline, the separator, the condensate pipeline, the dry steam pipeline, the condensate discharge pipeline, and also the shut-off-control equipment. The technical result of the invention is the increased efficiency of the methane tank due to provision of the optimal mode of the heating, more thorough mixing of the sediment, minimization of the losses of the heat power and the increased reliability the service life of the used equipment.

EFFECT: the invention ensures the increased efficiency of the methane tank due to provision of the optimal mode of the heating, more thorough mixing of the sediment, minimization of the losses of the heat power and the increased reliability the service life of the used equipment.

7 cl, 1 dwg

FIELD: environmental protection; methods and devices for the waste waters sediment heating up for the anaerobic stabilization in the methane-tanks.

SUBSTANCE: the invention is pertaining to the field of the biological purification of the waste waters, in particular to anaerobic stabilization of the sediments in the methane-tanks for the waste waters purification facilities with the productivity of more than 50-100 thousand m3/day at the mesophilic (32-35°C) and the thermophilic (52-55°C) temperature modes. For the sediment heating up and its anaerobic stabilization in the methane-tank the raw sediment is loaded in the methane-tank, the partially stabilized sediment is withdrawn from the methane-tank, heat with the steam in the injector and after that load again in the methane-tank. At that the source steam is divided in the separator into the condensate and the dry steam. The crude sediment is loaded in the methane-tank after its mixing with the partially stabilized sediment and the condensate produced at separation of the source steam. The mixture including the partially stabilized sediment, the crude sediment and the condensate is heated up by the dry steam, which is fed to the inlet of an injector with the possibility of the flow control. The heating device of sediment for anaerobic stabilization in the methane-tank contains the methane-tank, the pipeline of the crude sediment feeding, the injector, the injector intake pipeline and the pressure pipeline, the source steam feeding pipeline, the separator, the condensate pipeline, the dry steam pipeline, the condensate discharge pipeline, and also the shut-off-control equipment. The technical result of the invention is the increased efficiency of the methane tank due to provision of the optimal mode of the heating, more thorough mixing of the sediment, minimization of the losses of the heat power and the increased reliability the service life of the used equipment.

EFFECT: the invention ensures the increased efficiency of the methane tank due to provision of the optimal mode of the heating, more thorough mixing of the sediment, minimization of the losses of the heat power and the increased reliability the service life of the used equipment.

7 cl, 1 dwg

FIELD: agriculture; bioenergetic installations for processing organic waste materials of the farm-production in the anoxic conditions.

SUBSTANCE: the invention is pertaining to the field of agriculture, in particular, to the installations for processing organic waste materials of the farm-production in then anoxic conditions and may be used for production of the biogas. The bioenergetic installation contains: the methane-tank with the water jacket, the heat insulation, the stirrer, the loading and unloading connecting pipes, the pipe ducts of the biogas feeding and the gas-holder. The installation is supplied with the helio-collector, the electrical water-heater and the Sterling engine in the form of the thermomechanical generator with the biogas burner, which is arranged on the side of the engine bottom and connected to the pipe duct for feeding of the biogas from the gas-holder. In the Sterling engine the heat energy of the biogas burning in the biogas burner is converted into the electric power and used for heating of the biomass fermented in the methane-tank up to the necessary temperature and provision of the continuous operation of the system in the periods of absence of the solar energy-radiation{sunlight}. The invention ensures the stand-alone power supply of the local customers in the rural area with the combined utilization of the solar energy and the power of the biomass.

EFFECT: the invention ensures the stand-alone power supply of the local customers in the rural area with the combined utilization of the solar energy and the power of the biomass.

2 dwg

FIELD: biotechnological processes.

SUBSTANCE: invention relates to anaerobic fermentation of manure, energetic biomass, and similar organic substrates. Method envisages providing organic material containing solid and/or liquid fraction and treating this organic material with lime at pressure and temperature between 100 and 220°C, which results in hydrolysis of organic material. Lime is composed of Ca(OH)3 and/or CaO and being added to trap evolving ammonia and to disinfect organic material it also precipitates dissolved orthophosphate.

EFFECT: reduced amount of viable microorganisms.

125 cl, 6 dwg, 1 tbl

FIELD: ecology, chemical technology.

SUBSTANCE: invention proposes a method for preparing a reagent used in detoxification of deposits in cleansing constructions. Method involves an aqueous-thermal treatment of waste comprising animal proteins in the presence of alkali. Waste, water and alkali are taken in the ratio = 1:(1.8-2.0):(0.38-0.46), respectively, and treatment is carried out at temperature 160-180°C for 25-30 min to obtain the end product consisting of an alkali solution and mixture of sodium or potassium hydrate salts of amino acids. For treatment of cleansing sewage water deposits the measurement of the necessary amount of reagent is carried out with taking account the concentration of each heavy metal as a component of the deposit. Method provides preparing the effective agent for detoxifying the cleansing construction deposits and reducing the consumption of reagent in carrying out the detoxification of deposits of cleansing constructions.

EFFECT: improved preparing method, enhanced effectiveness of detoxification.

3 cl, 4 ex

FIELD: chemical detoxification methods.

SUBSTANCE: invention relates to methods for chemical detoxification of stored for long time (at least two years) galvanic production effluent sediments and can be used in mechanical and instrumentation engineering as well as in electronic industry. In the beginning of process, galvanic sludges are activated with sulfuric acid solution, pH 3.8-4.0, for 15-20 min, after which, ferritized galvanic sludge, ferrous sulfate, and alkali to pH 9-10 are added at stirring and heating. Ferritizing process is performed for 25-30 min while maintaining temperature of reaction mixture heating to 50-60°C.

EFFECT: enabled detoxification of long-term galvanic sludges and reduced detoxification expenses.

1 dwg, 3 tbl

FIELD: production of inorganic compounds.

SUBSTANCE: process of invention can be used for conversion of calcium nitrate formed during polythermal crystallization of nitric acid extract of apatite or another phosphate raw material to produce calcium carbonate and ammonium nitrate. Process comprises treating calcium nitrate in continuous mode at stirring and temperature 50-80°C with ammonium carbonate solution by way of simultaneously supplying into conversion reactor calcium nitrate and ammonium carbonate solutions using 0.05-0.50% excess of ammonium carbonate (taking into account free carbon dioxide); separating calcium carbonate by filtration; washing and drying. Mass portion of calcium nitrate in solution is controlled in the range 10-13% by adding ammonium nitrate solution to acidic melt of calcium nitrate tetrahydrate. Filter residue is washed with process condensate at solid-to-liquid ratio (1÷3):1 in one step or in two steps using second-step filtrate in first-step washing. Calcium carbonate production process according to invention is compatible with existing production, provides desired degree of washing ammonium compounds out of precipitate, and improves quality of calcium carbonate owing to reduced mass portion of water-soluble ammonium nitrogen in product to 0.005-0.03%.

EFFECT: enhanced process efficiency and improved quality of product.

2 cl, 2 tbl, 2 ex

FIELD: inorganic compounds technology.

SUBSTANCE: invention relates to methods of preventing or alleviating problems associated with precipitation of metal sulfides in industrial water systems and can be, in particular, used in petroleum and paper industries. Method of treating precipitates of metal sulfides in water system containing or contacting metal sulfide deposit comprises (i) adding, separately or jointly, sufficient amount of phosphorus compound selected from tris(hydroxymethyl)phosphine compounds or salts thereof and sufficient amount of aminocarboxylate or aminophosphonate chelating agent to produce solution containing 0.1 to 50% tris(hydroxymethyl)phosphine or its salt and 0.1 to 50% chelating agent and (ii) bringing thus obtained solution into contact with deposit so that at least part of metal sulfide deposit dissolves and is withdrawn from the system.

EFFECT: enabled inhibition, diminishing, dissolution, or dispertion of metal sulfide precipitates in water systems.

46 cl, 1 tbl

FIELD: minerals recovery methods.

SUBSTANCE: elementary phosphorus is isolated from aqueous slime containing from about 1 to about 15% dispersed phosphorus. Slime is first supplemented by from about 1 to about 20% (based on the weight of phosphorus present in the slime) phosphate salt having general formula: wherein R represents alkali metal or ammonium and n ranges from 0 to 30, in particular, sodium tripolyphosphate, tetrasodium pyrophosphate, or sodium hexamethaphosphate. Phosphorus in slime is melted and solid components of slime are separated from liquid phosphorus and water. Recovered phosphorus has purity above 99% and degree of its recovery from slime is high.

EFFECT: enhanced phosphorus recovery efficiency.

20 cl, 1 tbl

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