SU1549928A1 - Installation for cleaning waste water and processing sediments - Google Patents

Abstract

The invention relates to wastewater treatment and can be used when discharging water into a reservoir in order to prevent its pollution. The purpose of the invention is to increase the degree of wastewater treatment from organic compounds, suspended solids, reduce the amount of precipitation, improve the environment. The installation comprises a receiving chamber 2, a multi-chamber with rotating biofilters 4, a compressed air supply pipe 9, a settling tank 12, an aerobic sludge treatment tank 16, and pipelines 14 and 19 for discharging purified water and sludge. Sewage water enters the tank with biofilters 4, passes chamber 7, undergoes biological treatment and is sent to sump 12. Partially stabilized sediment from the sump is fed through conduit 11 to receptacle 16. Stabilized sediment is discharged through conduit 19, and purified water is transported through conduit 14 The invention provides an increase in the degree of wastewater treatment, a reduction in biomass growth, a reduction in the treatment time of wastewater and a reduction in capital costs due to the exclusion of the primary sedimentation tank from the installation . 4 il.

Description

The invention relates to wastewater treatment and can be used when discharging water into a reservoir in order to prevent its contamination.

The purpose of the invention is to increase the degree of purification of wastewater from organic compounds, suspended solids, reducing the amount of precipitation, improving the environmental situation.

FIG. 1 shows the installation, a longitudinal section; in fig. 2 shows section A-A in FIG. one; FIG. 3 shows the construction of disks, a general view; FIG. 4 - the same, side view.

The installation contains a sewage water inlet pipe 1, a receiving chamber 2, a sieve-grid 3, a multi-chamber tank with semi-submersible rotating biofilters 4 with a longitudinal axis of rotation, equipped in the chambers 5 with a nozzle from planar loading in the form of corrugated discs 6. The number of chambers 5 should be within 1-3. In subsequent chambers 7, the nozzle is made of a fibrous load 8 in the form of ruffs. The chambers 7 are equipped with a compressed air supply line 9, and the last chamber is equipped with a sludge collection tray 10 and a sludge discharge line 11. Ostyoyik 12 contains thin-layer modules 13 and pipelines 14, 15 removal of treated wastewater and sediment. The capacity of 16 aerobic treatment of sediment with filler 17 of fibrous loading in the form of ruffs is equipped with an airlift 18 connected to pipelines 11, 15 of sludge removal from the pallet

last chamber and sump as well

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pipeline 19 unloading the treated sludge.

Each disk 6 of the chambers 5 is divided into sectors 20, bounded by the lath 21 on the sides. The adjacent disks closely adjoin each other with an offset of the guide corrugations at an angle so that the side projection of the disk pack has a honeycomb structure: 4

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5 30

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to create favorable conditions for the even supply of nutrients and oxygen to the entire surface of the biodisk by organizing the radial circulation of the fluid being cleaned. The ratio between nutrient concentrations and dissolved oxygen in the peripheral and central areas of the disk is determined by the distance between the inner edge of the plates and the axis of the disk.

A disk assembled from sectors along the periphery due to additional liquid turbulization prevents the deposition of excess biofilm and contributes to the creation of conditions for its uniform transportation across the bottom of the installation, which eliminates the possibility of biofilm depositing, creating anaerobic conditions in the installation and the subsequent floating of dead biofilm, which allows increase the degree of wastewater treatment.

The implementation of the nozzle biofilters in the form of corrugated discs in the chambers in the amount of 1-3 is determined by the range of use of the treatment plant. Municipal wastewater has a concentration of contaminants by suspended matter and a MIC floor in the range of 100 mg / l with a drainage rate of 400-500 l / hl / day to 600 mg / l at a drainage rate of 100 l / hl-day. At the same time, if the chambers are of the same size and specific microenoses of microorganisms are created by chambers, for example, at trophic levels, then, taking into account the oxidation rates of dissolved organic impurities and the salinity of the growing biomass and suspended solids, it is necessary to provide a different number of chambers as at 45 microbial stages cleaning (operation of microorganisms of the first trophic level), where it is advisable to use non-alloying corrugated discs, and at the stages of cleaning and

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manual. Due to this arrangement of 5Q aftertreatment of sewage of hydrobiontsectors between adjacent disks, a system of channels of variable cross section is formed, which makes it possible to mix wastewater and air under optimal conditions, contact them with biofilm, and also remove excess biomass.

The presence of a strip bounding a sector of a disk from the side allows

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mi second and third trophic levels.

The bio drums with a ruff nozzle of the first chambers adsorb suspension, silt up very quickly and require frequent regeneration, which complicates operation. To unload the first steps and bring together the possibilities of the oxidizing power of biomass at

tertiary treatment of sewage hydrobiont

mi second and third trophic levels.

The bio drums with a ruff nozzle in the first chambers, adsorbing the suspension, are silted up very quickly and require frequent regeneration, which complicates operation. In order to relieve the first steps and bring together the possibilities of the oxidizing power of the biomass of the attached microorganisms and the oxidizing ability of the aeration system (oxygenation) of the waste liquid, the first 1-3 chambers of the biofilters from the corrugated discs are performed. In this case, if BOD, and suspended solids in the effluent are at a level of 100 mg / l, then only one chamber is made with a nozzle of corrugated discs, and if the quantities of BPCPOL and suspended solids reach 500-600 mg / l, then such chambers make 3. At intermediate values of wastewater contamination, 2 chambers with a nozzle of corrugated discs are made.

The situation is similar with cameras with a nozzle in the form of drums with ruffs. However, the number of cameras with a nozzle in the form of ruffs must be performed at least one more than the number of cameras with a nozzle of corrugated discs. This is because the chambers with a bio drum reel with ruffs perform the following functions during cleaning. In the first chamber with ruffs there is a retention of suspensions of sewage and in clots on ruffs there are transformations of organic impurities, the dissolution of hydrolyzed compounds in water. Continued microbial water purification is observed. In the subsequent chamber the processes of mineralization of the growing biomass of microorganisms of the previous stages of purification proceed. If the drains are low-concentrated, then this chamber will be final, and if it is highly concentrated, then with the same dimensions of their chambers, an additional number will be required (with a total number of chambers with ruffs up to 4).

The installation works as follows.

The urgent water is introduced through conduit 1 into the receiving chamber 2, where it passes through the screen-sieve 3. Next, the waste water enters the multi-chamber tank with semi-submersible rotating biofilters 4 with a longitudinal axis of rotation. Next, the waste water passes the subsequent chambers 7 with a nozzle from a fibrous load 8 in the form of ruffs. With the passage of waste water through a multi-chamber tank, a biofilm is formed on the surface of slowly rotating disks and brushes, which adsorbs during immersion.

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discs and ruffs into the water containing organic contaminants, which are used by microorganisms. films as food, with some of them going into the substance of the biofilm, contributing to its growth. Part of the disks and ruffs coming out of the water absorbs oxygen from the air into the biofilm. Planar and fibrous loading from ruffs have a sufficiently developed surface for attaching microorganisms of various compositions, which provides high quality wastewater treatment, and have high corrosive properties, sufficient strength, high soil capacity, and low hydraulic resistance. In addition, fiber loading from ruffs has the strength of cell adhesion to its surface, which is sufficient to prevent spontaneous leaching of adherent microorganisms.

The loading of the ruffs also partially stabilizes the excess biofilm formed during the wastewater treatment process. As the biofilm grows and its thickness increases on lamellar disks, the biofilm dies out and slips periodically. Spent biofilm, falling into the treated wastewater, is also involved in the cleaning process as suspended biomass. On loading from ruffs there is no spontaneous slipping of excess biomass. In order to remove it, air is periodically regenerated.

The waste water leaving the multi-chamber tank, containing the products of complete and partial oxidation of organic substances and partially stabilized excess biomass, flows by gravity into the sump 12 with thin-layer modules 13, where it settles for 1.5 hours.

Purified wastewater having

0 to 5-8 mg / l of MIC and suspended solids up to 10 mg / l, and 14 purified water is discharged through the pipeline. Partially stabilized sludge having an ash content of 40% from pan 10 of the last chamber

g and from the settling tank 12 through the pipeline 11 is fed by an airlift 18 into the tank 16 of the aerobic treatment of sediment with H nCui: nf- teleme 17 from a fibrous load in the form of ruffs. Stabilization of sediment

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comes under the influence of aerobic microorganisms and hydrobionts developing on the European loading. As a result of stabilization, the precipitate has a moisture content of the order of 95%, the degree of decomposition of organic matter is 60%. The stabilized sediment is discharged from the tanks 16 via conduit 19.

The invention provides an increase in the Q degree of wastewater treatment, a reduction in biomass growth, a reduction in the treatment time of wastewater, and a reduction in capital costs due to the exclusion of primary settlers from the plant.

Claims (1)

Invention Formula A sewage treatment and sludge treatment unit, including a receiving chamber, a sieve, a multi-chamber with semi-submersible rotating biofilters with a nozzle,. secondary sedimentation tank with sludge discharge pipeline, aerobic sludge treatment capacity, inlet pipelines 15499288 waste water and removal of purified water, about the fact that, in order to increase the degree of purification from organic pollution, suspended solids, reduce the amount of precipitation, improve the ecological situation, no more than three biofilters of the chambers are made in the form of corrugated discs. with c-planks with the formation of sectors and adjacent to each other with the displacement of the guide corrugations, the nozzle of the biofilters of the subsequent chambers in an amount one unit higher than the previous one, is made in the form of ruffs made of fibrous loading the chamber with loading a ruff provided with conduits supplying compressed 20 air, sludge collection tray with sludge discharge pipe, secondary settling tank equipped with thin-layer modules, aerobic treatment tank equipped with ruffs 25 and an airlift connected to the pipelines draining sludge from the sump and pan. ten, IMhHMhHH-lh- HHH4t-H Aa eleven FIG. 2  //////////////////////// LF 20 21 figs