Composition and method for soil restoration from formation fluid contaminants

FIELD: soil restoration from formation fluid contaminants in oil recovery and transportation regions.

SUBSTANCE: claimed composition contains (mass %): chemical ameliorant 3.5-5.7; organic fertilizer 15.7-29.0; adsorbent 67.5-78.6. Method for sectioning soil treatment includes application of composition onto soil layer with 30 cm of depth. Then treated layer is shifted out of spot boundary. Opened surface is covered with composition of present invention. Then mole drainage of 60-65 cm in depth is made in soil by using mole plow or chisel plow, followed by plowing of 58-51 cm in depth and returning of sheared soil into spot.

EFFECT: effective soil restoration from formation fluid contaminants.

5 cl, 2 dwg, 1 tbl

 

The invention relates to compositions for cleaning and methods of cleaning soil from contamination of the reservoir fluid, and can be used for cleanup of contaminated soil reservoir fluid in the places of production and transmission pipelines.

In modern agricultural practice, there are various methods of purification and remediation of land contaminated by petroleum and reservoir fluid. Known, for example, the method of purification and remediation of contaminated soil, including the impact on the ground by the explosion of the use of explosive substances, placed in made in the soil of the hole (patent RF №2103076 on CL In 09 With 1/00, 1/06, And 01 In 79/02, priority from 11.04.96,, publ. 27.01.98,, bull. No. 3). This method provides for cleanup of contaminated soil with oil products due to the pulsed temperature rise in the explosion, which destroys the volatile components of petroleum products, however, the task of cleaning soil contaminated formation fluid, this method does not solve.

There is also known a method of cleaning surfaces from contamination by oil and oil products, including the application of contaminated surface peat, milled and heat-treated to the bulk density of 0.09 to 0.13 g/CC, containing humic acid in the amount of 20-30 wt.%, and after application of peat additionally applied aqueous suspension of carbohydrate is roadgraders bacteria of the genus Rhodococcus, containing salts of nitrogen, phosphorus and potassium, the consumption of peat is 0.3-0.7 kg per 1 kg of pollution and consumption of water suspension is 8-12 kg per square meter of surface (patent RF №2104103 on CL In 09 With 1/10, 02 F 3/34, With 12 N 1/20, with priority from 22.05.96,, publ. 10.02.98,, bull. No. 4). This cleaning method, however, does not provide for cleanup of soils contaminated formation fluid.

Also known a method of reclamation reclamation of saline soils (Burlaka, VA, Milutin VA “Study and implementation in the Samara region technologies reclamation reclamation of saline soils”, abstracts of the 44-th scientific conference of the faculty of the BSAA, SAMARA, 1997, s), including chemical, agro and agro-technical treatment of saline soils. Chemical treatment comprises applying to the soil chemical improver, for example gypsum, agrobiological treatment includes deep drainage tillage and agronomic processing includes milling and disking top nadsolevoe horizon at a depth of 8-10 cm with subsequent or simultaneous loosening of sodic and podsolennogo horizons to a depth of 30-35 cm and more. However, the known method is inefficient when cleaning up soil contaminated by the spill reservoir fluid.

Closest to the technical nature of the claimed invention are the becoming for cleaning soil from oil spills and the method of cleaning soil from oil pollution by RF patent No. 2175580 on CL In 09 With 1/10, priority from 27.12.99,, publ. 10.11.2001,, bull. No. 31. In a known composition for cleaning soil from oil spills containing meteorologie microorganisms, fertilizer and adsorbent, as oil-oxidizing microorganisms using activated sludge from sewage treatment facilities, refineries, selected from the distribution chamber of the secondary clarifiers through 0-8 hours after the conclusion of the system on regeneration, and as fertilizer - manure in the following ratio, wt.%: activated sludge 1-2, manure 25-35, adsorbent 63-74. A known method of cleaning soil from oil pollution includes processing composition containing meteorologie microorganisms, fertilizer and adsorbent, the composition as fertilizer use manure as oxidizing microorganisms activated sludge from sewage treatment facilities, refineries, selected from the distribution chamber of the secondary clarifiers through 0-8 hours after the conclusion of the system on regeneration, in the following ratio, wt. %: activated sludge 1-2, manure 25-35, adsorbent 63-74, once a month additionally produce loosening of contaminated soils to a depth of 50-55 cm, when soil moisture is less than 50% produce watering, and the optimal volume proportion contaminated soil is a/the adsorbent is determined according to the calculation formula, the optimum ratio of components is chosen according to the schedule, and the optimal dose of activated sludge is chosen by the calculation formula and graphics.

Known composition for cleaning soil from oil spills and the method of cleaning soil from oil spills provide effective cleaning of soil from oil pollution, but do not provide complete cleaning and remediation of soil contaminated formation fluid.

The objective of the invention is to provide a composition for cleaning soil contaminated formation fluid, and method of cleaning soil from contamination of the reservoir fluid, providing maximum cleaning and remediation of contaminated sites within 3-4 years.

The problem is solved by the proposed group of inventions, including the composition for cleaning soil from contamination of the reservoir fluid, and a method of cleaning soil from the specified pollution. Composition for cleaning of contaminated soil reservoir fluid includes hemmelgarn, adsorbent, organic fertilizer, as homelegance used, for example, gypsum, as an adsorbent, for example, straw of cereals or of peat, manure cattle manure, in the following ratio, wt.%: hemmelgarn 3,5-5,7, organic fertilizer 15,7-29,0, the adsorbent 67,5-78,6. This ratio of components was set ek the pilot. The method of cleaning soil from contamination of the reservoir fluid includes processing the specified composition, and applying the composition to the contaminated soil is layers, layers with a thickness up to 30 cm, 30-60 cm and so on, pinch the top of the treated layer outside spots, and for drainage of aqueous solutions of the products of chemical processes perform horizontal drainage molehills, and then produce the plowing, ensure mixing of the composition with a layer of treated soil, and then return shifted the ground in the spot.

The essence of the proposed group of inventions is that by using the proposed composition for cleaning soil from contamination of the reservoir fluid, and method specified cleaning is ensured by improving water and air permeability of the soil and the creation of a mulch of loose top soil layer to prevent surface evaporation, which provides efficient and cost-effective cleanup of the soil and its high environmental performance and allows you to restore the fertility of the soil, the contaminated formation fluid, for 3-4 years.

The invention is illustrated in the drawings, in which figure 1 is given a section of profile spots of contaminated soil, figure 2 shows the arrangement of the working bodies and the principle of operation of sodic plow, for example, type Fri-3-40A.

Damage to soil is to cover areas of the spill reservoir fluid and the reservoir fluid mixed with oil, compared with pure oil spill. Contaminated only with petroleum stations oil adsorbed in the soil layer thickness of 0-20 cm, while in places the spill reservoir fluid soil degrades at a depth of 1-2 meters. The nature of pollution is characterized by a continuous placement of salts in the soil horizon, the decrease in the concentration of salts from top to bottom, the location of the spots on the folds. Figure 1 shows the profile spots when brining the reservoir fluid to a depth of 1.2 m (most common case). Cleanup of contaminated site soils using the proposed composition for cleaning and method of cleaning soil is as follows.

First, a disc harrow is loosening the top layer of contaminated soil to a depth of 10-12 cm Then the soil surface is leveled. Then aligned on the surface of the applied composition for cleaning soil from pollution of the reservoir fluid. The composition includes hemmelgarn, for example gypsum, up to 18 tons (which is in the range of 3.5 to 5.7 wt.%), 250-350 tons of adsorbents, for example the remains of maize plants from silage pits and mounds, peat, chopped straw, shavings, etc. (equivalent to 67.5 and 78.6 wt.%), and 50-150 tons of organic fertilizers (i.e. 15,7-29,0 wt.%), for example, cattle manure. The optimal aspect] is a solution of the components is selected based on the nature of the contamination is site-specific. Then make a double disking and plowing final ploughs (Fig.1, a, b, 2, a) at a depth of 30 cm After the bulldozer to move the loosened soil outside spots (Fig 1, b). Then make the resulting surface stains composition with the calculated quantity of plaster, adsorbents and organic fertilizers (layer 30-60 cm) evenly over the surface of the spots. Then without bringing raw soil-crotonates or chisel cultivator to a depth of 60-65 cm in the profile plot are cut molehills, followed by conventional tillage or alkaline plow, such as plow Fri-3-40A, 3-tier version with removed dumps buildings of the first layer, to a depth of 48 to 51 cm (figure 1, and figure 2, b), which provides mixing of the composition with a layer of treated soil. Then the bulldozer return shifted the ground in the spot and smooth the surface (Fig 1, d). For the speedy recovery of soil fertility, it is advisable to parkovanie, and in winter and spring - retention with subsequent seeding of phyto-reclamation of culture.

Field work must be performed in a short time, avoiding excessive drying of the soil. Work on making the proposed composition on the surface of the spots, contaminated formation fluid, followed by double disking and plowing her sortowanie outside spots allows you to more accurately what zvesti mixing of the composition with the soil and to avoid overstocking soil after returning the soil in the spot. Pinch the top layer of the soil is necessary because it provides better mixing of the composition with the contaminated soil, the possibility of a deeper cutting of molehills to drain outside the spot solutions of soluble salts, soda and other products resulting from the ameliorative effect. Made in the treated layer of soil organic helps, first of all, aeration of soil, the more rapid filtration of moisture, as well as deeper penetration of the root systems of plants and provide them with nutrients. Ingredients are delivered to the contaminated sites separately, from different places of shipment, but in the aligned spot on the plot are normalized and blend. Given the large volume of the composition, the mixing is done by tractors bulldozers type T-170 and bucket front loaders type-18, SO-28. Then the composition is distributed over the surface of the contaminated soil and subsequent technological operations thoroughly mixed with a prescribed amount of contaminated soil. At the time of completion spasenoski soil is 18-22 see Volume weight of the soil decreases from 1.4 g/CC to 1.1-0.9 g/CC, the total porosity increases from 44 to 62-68%. The current environment in the soil layer of thickness up to 80-90 cm is sufficiently loose that prevents rising damp from either eliasi horizons. In order to obtain high ameliorative effect this spot it is advisable to propanoate, effectively using the amount of precipitation. Care for the ferry is hoeing the soil surface, the destruction of the formed cover to conserve moisture in the soil. It is better to make Zubov harrows in 1-2 track or Creases.

In the spring before sowing phyto-reclamation of culture and after seeding is the consolidation of the soil. In addition, before sowing or at the same time you need to make 60-80 kg/ha of nitrogen fertilizers, such as ammonium nitrate, acidic, in order intensive development of plants in the initial period. Planting it is advisable to narrow or widespread method and inflated with 1.5-1.6 times the seeding rate, providing a fast closure of the surface of the field plantlets. As phyto-reclamation of culture, it is advisable to sow perennial grasses or annual crops with deep penetrating root system. First of all it is alfalfa, goat's Rue, sainfoin, clover is a biennial or annual or their mixture, sorrel forage, fodder beet, rye winter. After cleaning phyto-reclamation of culture all residues, including straw rye and beet leaves, you must take out the spots, because their composition contains a large amount of salts. After 3-4 let this spot must be meleanie-chromowanie or deep Kiselevka for loosening and formation of molehills and improve filtration of moisture. The main ameliorative effect is achieved in the first 2-3 years after completion of the work: during paravane and the first year of growth phyto-reclamation of culture.

The results of four studies showed that in the absence of the composition to restore soils contaminated formation fluid, one of the components at various combinations of doses of other cleaning soil contaminated formation fluid does not occur, indicating the presence of a synergistic effect. The influence of the ratio of the components on the restoration of lands contaminated formation fluid, and on the productivity of phyto-reclamation of culture, such as sweet clover is an annual, shown in the table.

td align="center"> 78,4
no versionName of the componentFraction, wt.%The average yield of green mass in the flowering phase for 1999-2002,, t/ha
1Hemmelgarn2,8 
 The adsorbentof 83.460,0
 Organic fertilizer13,8 
2Hemmelgarn2,0 
 The adsorbent140,0
 Organic fertilizer19,6 
3Hemmelgarn4,4 
The adsorbent69,5270,0
 Organic fertilizer26,1 
5Hemmelgarn5,6 
 The adsorbent66,6200,0
 Organic fertilizer27,7 
5Hemmelgarn8,3 
 The adsorbent62,5110,0
 Organic fertilizer29,2 

As the table shows, the ratio of the components on the 1st and 5th options does not ensure the formation of a full crop phyto-reclamation of culture (annual clover). The ratio of the components in the 1st variant is not sufficient to create a favorable physical properties of the soil primarily due to the lack of adsorbents and organic matter, providing water-air regime of soil and food plants the population in the contaminated environment. In the 5th embodiment, only the first stage conditions for the growth and development of plants is favorable, and in the dearth in the first half of the summer total soil porosity twice the optimal value, not allowing the ingress of moisture from the underlying horizons, which leads to the cessation of growth and wilting of plants. Small soil pores becoming clogged with plaster, and the plaster and contaminated soil from the upper horizons are moved to the layer 27-30 cm, the processes of land reclamation difficult and slow. The most effective is the composition according to option 3. This is confirmed by the yield, and the General condition of the plants. In years with high summer precipitation, as well as in more humid areas justified the use of option 4. In the arid steppe areas and in dry years is equivalent to the effect of option 2 (in the first year of planting). In subsequent years, these sites are the differences in the quality and quantity of the yield of agricultural crops grow not in favor of option 2. To maintain and enhance the physical properties of the soil will need to be part of the same dosage and in the following year, which would lead to unreasonable costs to perform a full cycle of works (about 70% of total costs).

In 2001, the lands LLC “Golden Niva” Kinel-Cherkassy district of the Samara region, on ordinary Chernozem soil, zagrjaznen the m repeated spills of the reservoir fluid with a concentration of water-soluble toxic salts up to 460 mg per 1 kg of soil, after the survey for the clean-up has made a composition consisting of (a hectare average) 18 tonnes of limestone flour, 300 tons of adsorbents in the form of residues of maize plants from silage pits (220 g) and finely ground wheat straw (80 t), in order to enhance soil biota and provide nutrients readily available to plants, made of organic fertilizer - 100 t paperarello of cattle manure in the soil layers up to 30 cm and 30-60 see In 2002 was seeded and grown barley. The grain yield of barley on the restored site was not lower than that in the background, and plants in color and width of lamina favorably differed from plants on the background areas.

In 2002, on the lands of JSC “Plowman” Volzhsky district, Samara region in the area of 4.2 ha when the content of toxic water-soluble salts to 420 mg/kg of soil and the depth of the contamination layer is more than 50 cm was made in two layers: up to 30 cm and 30-60 cm composition of the following components: screening of plaster of 20 tons, peat and shredded straw - 220 t, prepararsi manure from cattle 140 tons In 2003 on a plot with the restored soil fertility grain yield was above background uchastki more than 3 t/ha or 12%and grain quality was not inferior to the latter.

The invention allows for efficient cleaning of areas of soil contaminated reservoir is incostly, recover within 3-4 years the fertility of the soil, to ensure environmental safety obtained on treated plots of agricultural products.

1. Composition for cleaning of contaminated soil reservoir fluid, comprising hemmelgarn, adsorbent and organic fertilizer, characterized in that the specified components are taken in the following ratio, wt. %:

Hemmelgarn 3,5-5,7

Organic fertilizer 15,7-29,0

The adsorbent 67,5-78,6

2. Composition for cleaning soil according to claim 1, characterized in that as homelegance used, for example, gypsum.

3. Composition for cleaning soil according to claim 1, characterized in that the adsorbent is used, for example, straw of cereals or peat.

4. Composition for cleaning soil according to claim 1, characterized in that as an organic fertilizer is used, for example, cattle manure.

5. The method of cleaning soil from contamination of the reservoir fluid, comprising a processing composition containing an organic fertilizer and the adsorbent, characterized in that the composition additionally introduced hemmelgarn in the following ratio, wt. %: hemmelgarn - 3,5-5,7; organic fertilizer - 15,7-29,0; adsorbent - 67,5-78,6, handling contaminated surfaces specified composition is produced in layers, and the composition is applied to the soil layer thick is up to 30 cm, then a layer of treated soil to move beyond the spot, and on the resulting surface, apply the components of the composition, after that without bringing raw soil-crotonates or chisel cultivator cut in the soil molehills to a depth of 60-65 cm, and then produce plowing to a depth of 48 to 51 cm, providing mixing of the composition with a layer of treated soil, and then return shifted the ground in the spot.



 

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FIELD: soil restoration from formation fluid contaminants in oil recovery and transportation regions.

SUBSTANCE: claimed composition contains (mass %): chemical ameliorant 3.5-5.7; organic fertilizer 15.7-29.0; adsorbent 67.5-78.6. Method for sectioning soil treatment includes application of composition onto soil layer with 30 cm of depth. Then treated layer is shifted out of spot boundary. Opened surface is covered with composition of present invention. Then mole drainage of 60-65 cm in depth is made in soil by using mole plow or chisel plow, followed by plowing of 58-51 cm in depth and returning of sheared soil into spot.

EFFECT: effective soil restoration from formation fluid contaminants.

5 cl, 2 dwg, 1 tbl

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