Plant for biological purification of waste waters

 

(57) Abstract:

The invention relates to the field of biological purification of natural and waste waters. The installation consists of cameras biological treatment and installation of biological treatment, her body placed in it blocks the download attached to microorganisms in the form of a polymeric tubular device for the supply and disposal of water. The case is equipped with a system of dispersed distribution treated water on the area of its cross section, blocks downloads oriented front wall to the flow of water being treated, airlifting aerators placed in the center of blocks with loading, their upper ends elevated above these blocks, and the lower buried under them, the system tubular regeneration aerators placed under load, and the ratio of the areas of the cells of the tubular elements seteobraznyh patterns to areas of their surface area is from 0.2:1 to 0.7:1. You can use polymer load deposited on the surface of activated carbon; run polymeric tubular boot in the shape of a torus. Effect: increase the purity of the water and reduced energy consumption. 2 C.p. f-crystals, 1 Il., table 1. the used when solving problems of water supply and sanitation in remote areas of building cottages, cottage blocks, hotels, motels, filling stations, i.e. where there is no possibility of connection to the Sewerage system.

Known installation for the biological treatment of domestic wastewater, consisting of a settling tank propped up with the level of cleaning water and pumping station, biofilters with switchgears, mixing chamber with a chamber of the reactor and block the lamella clarifiers; the installation provides the contours of recirculation of clarified and biologically treated wastewater and sludge from the lamella clarifiers through lagoons mechanical cleaning and automatic control system (see patent Austria N 385498, class C 02 F 3/00 from 29.08.86,, publ. 11.04.88 year).

The disadvantage is the complexity of the design of the lamella clarifiers, the uneven distribution of water over the entire area of the biofilter and low degree of water purification.

Known modular plant for treatment of domestic wastewater, consisting of devices: pre-treatment, biological treatment, containing at least two rotating bioreactor with tubular loading, each of which contains one dive">

The disadvantage is the complexity of construction and the reduction in the reliability of operation due to the placement of equipment in direct contact with water to be treated.

Known installation for the biological treatment of wastewater, comprising pre-cleaning of septic tank for separating suspended and biofilm returned from the stage of purification of the clarifier, the device for biological treatment in aerated floating granular loading of the aeration tank attached to its surface by microorganisms, are equipped with a membrane aerators installed at the bottom of the aeration tank and providing circulation of air flow upward from the membrane through the layer of the boot and down along the side walls of the aeration tank for the formation of aerobic and anaerobic zones and device for supplying a pre-clarified water, buried in the aeration tank under layer download and device for purification of wastewater - secondary clarifier with airlift-type pump provided with the first septic tank - septic tank to drain it precipitate with excess biofilm (see brochure of the company DYWIDAG-AQUASCHUTZ, Germany "Compact sewage treatment plant for domestic sewage is olenna using granular load with a relatively small specific surface area, the lack of optimal processes biological treatment and post-treatment and low reliability.

Known plant for biological purification of wastewater that is closest to destination and technical nature of the claimed consisting of camera pre-treatment connected with her camera, biological treatment, equipped with a load in the form of a polymeric tubular elements of different cross-sectional shape mounted on a surface load of microorganisms, combined into blocks, placed in the body of the aerators, made in the form of diffusers installed at the lower edge of the block loading, and agitators, provides saturation of the water with air, mixing and creating circulating through the load water-air flow, and devices for supply and disposal of water; the installation is equipped with a clarifier to separate the remaining suspension and biofilms with recirculation of the latter into the chamber of biological treatment (see EN 2111177 C1, class C 02 F 3/06, from 20.05.98,

A disadvantage of the known installation is not a high purification degree of suspended solids up to 10-15 mg/l, organic pollution (BODfull)- the economic purpose and requires purification; high energy costs, due to the simultaneous use of aerators and agitators.

The technical result of the proposed facility is to increase the purity of the water and reduced energy consumption.

The technical result is achieved in that the apparatus for biological purification of wastewater, consisting of cameras biological treatment and installation of biological treatment, her body placed in it blocks the download attached to microorganisms in the form of a polymeric tubular elements, aerators, devices for supply and disposal of water, the body is equipped with a system of dispersed distribution treated water on the area of its cross section, blocks downloads oriented front wall to the flow of water being treated, airlifting aerators placed in the center of blocks with loading, their upper ends elevated above these blocks, and the lower buried under them, the system tubular regeneration aerators placed under load, and the ratio of the areas of the cells of the tubular elements seteobraznyh patterns to areas of their surface area is from 0.2:1 to 0.7:1.

Provides the opportunity to:

the use of polymeric zag form of the torus.

The drawing shows a plant for biological purification of waste waters.

The installation consists of cameras biological treatment 1 devices: for water inlet 2, the release of water 3, discharging sludge pumps 4 and device for the biological purification of water 5, consisting of a body 6, is equipped with:

system dispersed distribution of the water to be purified, made in the form of the distribution of the tray 7, the bypass Windows 8;

loading in the form of a polymeric tubular seteobraznyh structure with the ratio of the areas of tubular cells to the surface area of the elements from 0.2:1 to 0.7:1 and attached microorganisms 9 combined in block 10, oriented with its front wall 11 against the flow of water

placed in the center of the blocks 10 with the load 9 airlifting aerators 12, the upper ends of which 13 are lifted above the blocks 10 with the load, and the bottom 14 is buried under them;

system tubular regeneration aerators 15 placed under load 9;

device for the production of purified water 16 to bypass the Windows 17 and

a device for removing sludge 18.

Installation for biological and organic substances (BODfull) 250-350 mg/l of ammonium nitrogen 25-35 mg/l served in the camera pre-treatment 1 with zones of aeration and sedimentation via the input device 2. In the unsaturated zone occurs biochemical purification of water from organic contaminants using activated sludge microorganisms, where to create aerobic conditions and mixing of the supplied air. From the zone of aeration of the sludge mixture is supplied to the settling zone, where the separation of activated sludge from the treated water. Activated sludge deposited on the bottom in the zone settling and recycle to the aeration zone airlifting pumps 4.

Biologically treated water with solids content is 15-25 mg/l, organic substances (BODfull) - 15-25 mg/l of ammonium nitrogen, 5-10 mg/l, in a gravity mode through the device to release the water 3 is supplied to the device for biological purification of water 5, consisting of a body 6 are dispersed distribution of the water to be purified, made in the form of the distribution tray 7 with bypass Windows 8, placed in the upper part of the housing 6 of the device for biological purification of 5.

This system of dispersed water flow ensures its uniform distribution on the cross is s seteobraznyh structure with the ratio of the areas of tubular cells to the surface area of the elements from 0.2:1 to 0.7:1 and attached microorganisms 9, United in blocks of 10.

The tubular form of polymer loading seteobraznyh structure 9 with "highly developed" working surface and above the optimal ratio of the areas of member cells to areas of their surface defines:

effective mass transfer - water flow and oxygen to the entire working surface of the boot;

high filtration, sorption and retention of the boot and provides high concentrations of biofilm consisting of microorganisms adapted to the preparation of hard dirt and bacteria - nitrification, and, therefore, a high speed cleaning process and a high degree of water purification.

The possibility of using polymeric tubular boot deposited on the surface of activated carbon, significantly increase the degree of purification of water by increasing the sorption capacity of the boot, providing the removal of water specific difficultly oxidizable organic compounds.

The possibility of using polymeric tubular boot, made in the form of a torus, which significantly increases the degree of purification of water by increasing the area of working in blocks of 10 with a rigid frame, fitted with grid with cells that simplifies the installation and operation of the device and prevents the possibility of the load in airlifting the aerator 12.

The blocks 10 are oriented front wall 11 towards the flow of the treated water. This orientation of the blocks in relation to the flow of source water ensures optimum hydrodynamic regime of the process: a directed flow of the treated water passes through the outer layers of the load 9 from the front wall 11 of the block 10, at the same time to load 9 on top of airlifting aerator 12, placed in the center of the block 10, with the upper end 13, a raised on this block, and the bottom 14, buried under it - "pouring" water-air flow generated by supplying compressed air to the airlift-type aerator 12, lifting it up and saturation drain from under the load 9 and the lower end 14 of the aerator 12 water with oxygen. Distribute the air flow evenly flowing from the upper end of the reflector 13 of the aerator 12, passes down through the entire volume of the load 9 is connected with a part of the flow of water moving through the front wall 11 of the block 10 with the load 9.

System tubular regeneration aerators 15, placed under the blocks 10 with the load 9, Saparbek and is activated periodically for intense aeration, providing as clean boot 9 from excessive biofilm, reducing the degree of purification of water and prevent overgrowth of this download. Airlift-type aerators 12 can be installed and the end walls of the blocks 10 with the load 9.

Two Autonomous systems aeration: continuous - airlifting and periodic - through a system of tubular regeneration aerators 15, can increase the degree of purification of water as it eliminates the need for constant too intense aeration boot 9 and contribute to the maintenance of an optimal concentration of biofilms.

The degree of purification of the water is improved by maintaining the optimal amount of biomass and reduction of suspended matter.

Created by the repeated circulation of the air flow through the blocks 10 with a polymeric tubular download seteobraznyh patterns 9 provides a higher degree of water purification as by improving the mass transfer between water saturated with oxygen, and microorganisms attached to the developed surface of the polymeric tubular download seteobraznyh structure 9 with the ratio of the areas of the cells of the tubular elements seteobraznyh patterns to areas of their surface from 0.2:1 to 0.7:1, and sostoi download 9 with the above description.

When the ratio of the areas of the cells of the tubular elements seteobraznyh patterns to areas of their surfaces, a larger offer to 0.8:1 (cell size of more than 10 x 10 mm), reduced the working surface loading by reducing the number of fibers forming seteobraznyh the structure of the load 9, which leads to the reduction of the number of immobilized biofilms and, therefore, reduce the rate and degree of water purification.

When the ratio of the areas of the cells of the tubular elements seteobraznyh patterns to areas of their surface, a lower offer, and 0.1:1 (cell size less than 3x3 mm), the degree of purification is declining in the slow mass transfer processes due to the rapid obliteration of small load cells 9 seteobraznyh patterns.

Device to release the water made in the form of a modular tray 16 with a number of evenly spaced bypass Windows 17 and is located opposite to the water inlet side of the housing 6 of the device for deep biological treatment 5.

Purified water has the following parameters: suspended solids - 1-4 mg/l, organic pollution (BODfull- up to 3 mg/l, ammonia nitrogen up to 3 mg/l

Removal of sediment and discharge its poulnot proposed characteristics of the working surface of the boot, presented in the table.

The proposed installation in comparison with the known increase the purity of the water:

suspended substances from 10-15 mg/l to 1-4 mg/l;

for organic pollutants (BODfull) 6-10 mg/l to 3 mg/l;

for ammonium nitrogen from 5-8 mg/l to 3 mg/l due to:

create the optimum hydrodynamic regime of the cleaning process, which improves mass transfer, multiple circulation air flow upward from the upper ends of the diffusers 13, evenly distributed over the surface of the block 10 with the load 9, and downward (when passing through the entire volume of the boot with regard to the connection part of the stream of water passing through the front wall of the block 10);

to improve the efficiency of mass transfer processes contribute to the determinants of the uniform distribution of water throughout the volume of the load 9 - system dispersed distribution treated water, providing a uniform distribution across the width of the blocks 10 with the load 9, the frontal orientation of the above blocks to the flow of treated water, providing a uniform distribution along the height of the blocks 10 and, finally, the particular placement of airlifting aerators 9, and the bottom 14 buried under them, and providing uniform distribution of water along the upper surfaces of the blocks.

The efficiency of mass transfer processes increases and due to the use of polymer boot with "highly developed" working surface and the optimum ratio of the areas of the cells of the tubular mesh structure to the surface area of the elements from 0.2:1 to 0.7:1.

Only the combination of such signs, as a system of dispersed distribution of treated water, the frontal orientation of the blocks with the load, the particular placement of airlifting aerators, system of regeneration aerators and optimal characteristics of the working surface loading seteobraznyh structure provides deep cleaning of waste waters, increasing the purification efficiency for suspended solids 10 times, BODfull- about 3 times and ammonium nitrogen is more than 20 times.

The proposed installation also ensures reduced energy consumption by 1.2 times and improve reliability of operation due to:

use airlifting aerators that provide both aeration and stirring, if the "spout" of water from the aerator is complete the aeration of periodic action, unlike agitators in the known device, running continuously.

1. Plant for biological purification of wastewater, consisting of cameras biological treatment installation of biological treatment, her body placed in it blocks the download attached to microorganisms in the form of a polymeric tubular elements, aerators, devices for supply and disposal of water, characterized in that the housing is equipped with a system of dispersed distribution treated water on the area of its cross section, blocks downloads oriented front wall to the flow of water being treated, airlifting aerators placed in the center of the blocks with the load, while the upper ends of the diffusers are lifted above the blocks download and the lower buried under them, the system tubular regeneration aerators placed under load, and the ratio of the areas of the cells of the tubular elements seteobraznyh patterns to areas of their surface area is from 0.2 : 1 to 0.7 : 1.

2. Installation under item 1, characterized in that the polymer provided the load deposited on the surface of activated carbon.

3. Installation under item 1, characterized in that the polymeric tubular retrieve the

 

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FIELD: waste water treatment.

SUBSTANCE: method us intended for use in municipal economy, hydropower engineering, oil fields, and petroleum processing industry to reduce amounts of impurities discharged into fish-industry reservoirs. Method comprises creating, in open drainage channels, curtains with developed surfaces for immobilization of microorganisms, controlling amount of biomass secured on curtains in accordance with water-dissolved oxygen, establishing hydraulic-mode travel of water in open drainage channel ensuring optional utilization of the latter in the waste water treatment process. Biological treatment is accomplished by biocenosis attached to wire-brush curtains located in displaceable containers. Curtains are installed along the drainage channel with intervals allowing saturation of water with oxygen. Removal of excess biomass and deposits from wire brushes is accomplished by removing containers from the channel, placing them into water-filled tank, and regenerating were threads of brush by bubbling surrounding water, after which containers are reinstalled in the channel. Thickening of accumulated removed insoluble matters is achieved by circulation of polluted water from tanks through filter presses introducing intermediate flocculant treatment.

EFFECT: increased stability of post-treatment process and facilitated removal of accumulated deposits.

2 cl, 1 dwg

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