RU95332U1 - COMPLETED BLOCK OF A CLOSED TYPE SEWAGE STATION - Google Patents

Abstract

A complete block of a closed-type sewage treatment plant, including tanks for biological wastewater treatment by communities of microorganisms attached to a fibrous ruff nozzle and as part of a free-floating activated sludge, devices for dewatering wastewater sludge, communication systems for supplying and removing wastewater, air supply, removal accumulating sediments, equipped with thin-layer silt separators, blowers, equipped with fans that remove moist air exhausted in bioreactors outside the block building through cleaning and disinfecting devices, characterized in that it is round in plan with the mutual arrangement of thin-layer silt separators inside nitrifiers close to the center of the denitrifiers , as well as equipment for dewatering sludge and supplying air above them, ensuring the minimum lengths of communications for supplying air, supplying and discharging wastewater, removing precipitated sludge for dehydration and complies with clause productivity is multiple or equal to the first stage of construction of a treatment plant and subsequent stages with a complete cycle of deep wastewater treatment and sludge dewatering.

Description

The utility model relates to devices for treating household and similar industrial wastewater in composition and can be used in utilities in villages and small cities, if necessary, to bring the quality of treated wastewater to standards for discharge into fishery bodies of water, or can be used for technical needs industrial enterprises.

It is known to use complete units of closed sewage treatment plants in the form of round reinforced concrete structures with a two-level arrangement of reactors for wastewater treatment and equipment, as well as auxiliary facilities of the treatment plant [1]. A disadvantage of the known design is the discrepancy between the quality parameters of the treated wastewater and the standards for their release into fishery reservoirs.

The closest set of components to the wastewater treatment and sludge treatment process is the complex-block modular treatment plant [2], which includes biological wastewater treatment tanks by microorganism communities attached to a fiber brush nozzle and consisting of free-floating activated sludge, and devices that dewater sewage sludge , communication systems for inlet and outlet of wastewater, air supply, removal of accumulated sediments, floor layout of tanks, equipment and premises for I have the work and stay of the treatment plant staff, it is equipped with sludge separators and sludge sealers, blowers located on the lower floor and connected with air intake ducts with a ventilation chamber passing from top to bottom through all floors of the treatment plant and equipped with floor ventilation ducts, equipped with fans that exhaust the humid air exhausted into bioreactors outside the block building through cleaning and disinfecting devices, equipped with biocomposters for processing into biocompost dewatering ennyh sewage sludge, maturing and drying them by utilizing the heat of the heated air blowers.

The utility model is based on the following tasks: reducing the length of communications and energy costs for pumping wastewater and sludge, reducing the material consumption of block structures; improvement of conditions for the construction of sewage treatment plants in turn due to the presence in the unit of a completed wastewater treatment cycle and treatment of the precipitation.

The tasks are solved by the fact that the complete unit of a closed sewage treatment plant, including biological wastewater treatment tanks by communities of microorganisms attached to a fiber brush nozzle and consisting of free-floating activated sludge, devices that dewater sewage sludge, communication systems for supplying and discharging sewage , air supply, removal of accumulated sediments, equipped with thin-layer desilters, blowers, equipped with fans, venting wet The air exhausted in the bioreactors outside the block building through the cleaning and disinfecting devices is circular in plan with the mutual arrangement of the individual stages of the bioreactors and equipment, ensuring the minimum lengths of communications for air supply, supply and discharge of wastewater, removal of precipitates for dehydration and corresponds to productivity multiple or equal to the first stage of the construction of a sewage treatment plant with a completed cycle of deep wastewater treatment and sludge dewatering.

The advantages that are achieved indicate that the tasks that are solved are performed at the inventive step, since they do not follow, obviously, from solutions known in the art and therefore meet the patentability criterion of "inventive step".

The proposed "complete unit sewage treatment plant closed type" is illustrated by drawings (Fig.1-4), where Fig.1 shows the technological scheme of wastewater treatment and rainfall treatment. Figure 2 - block plan at around 0.00; Figure 3 - blanc block at around 8.0; Figure 4 is a cross-sectional view of technological tanks.

The designations in the drawings are as follows:

1. The combined installation of filtering.

Garbage collection bin.

Sand receiving bin.

2. The distribution chamber.

Perforated distribution chamber agitation system.

Electroshiber damper.

3. Denitrifier.

Submersible propeller stirrer.

4. Aerotank.

Fine bubble aeration system.

5. Thin-layer desilter.

Submersible pump for recirculation and removal of excess activated sludge.

6. Ruff-anthracite filter (EAF).

EAF aeration system.

Ershov loading EAF.

EAF Anthracite Loading.

EAF drainage loading.

EAF electronic shutter damper.

7. The capacity for collecting filter wash water.

Rinse water pump.

Wastewater tank agitation system.

8. The filtrate discharge pump.

9. Installation of UV disinfection.

10. The reservoir of clean water (RFV).

Submersible filter flushing pump

Perforated Disturbance System (RFV).

11. Blowers of the main technological processes.

12. The fan of removal of the moist exhaust air in bioreactors.

13. Desilter.

Sludge evacuation pump.

14. The intermediate tank.

15. Screw pump for sludge dewatering.

16. The centrifuge.

Bunker.

17. A complex of preparation and dosing of a coagulant solution.

18. The complex of preparation and dosing of flocculant solution.

19. The complex of dosing a solution of sodium hypochlorite.

20. BOD measurement station5.

21. Turbidity measuring station.

22. Nitrogen measuring station.

23. Station measuring phosphorus.

24. A unit for cleaning and disinfecting air discharged outside the block building.

25. The cylindrical wall of the block.

K1N - Pipeline for the supply of wastewater for mechanical treatment.

K1.1. - Pipeline node mechanical wastewater treatment.

K1.2. - Pipeline for treated wastewater.

K1.3.N - Pipeline for treated and disinfected wastewater.

K1.4.H - Water supply pipe for flushing filters.

K5.1.N - Pipeline recirculation of activated sludge.

K5.2.N - Pipeline for excess activated sludge.

K5.3.N - Pipeline for supplying compacted activated sludge to the intermediate tank.

K18H - Pipeline for diverting superficial water to a receiving chamber.

K19N - Pipeline for supplying compacted activated sludge to a centrifuge.

K20 - Pipeline drainage centrate in the receiving chamber.

G1 - Air Duct.

P1 - Coagulant solution supply pipe.

P2 - Flocculant solution supply pipeline.

P3 - Sodium hypochlorite solution supply pipe.

B1 - Water supply.

The complete unit of a closed sewage treatment plant is located inside a cylindrical body with a protecting wall (25). Inside the block there is a mechanical cleaning unit with a combined installation (item 1) of filtering, including a hopper (1.1) for receiving garbage and a hopper (1.2) for receiving sand. Next, the wastewater flows into the distribution chamber (pos. 2), equipped with a perforated system (pos. 2.1) of water agitation and an electric shutter damper (2.2) and flows through pipelines (K1.1) to the biological treatment unit, which includes 4 pcs. denitrification tanks (item 3), 4 nitrification tank aeration tanks (item 4) with built-in thin-layer sludge separators (item 5). In denitrifiers (3), the mass transfer is carried out by submersible propeller mixers (pos. 3.1), and in aerotanks, a finely bubble aeration system (pos. 4.1) communicated by air ducts (pos. G1) with blowers (pos. 11). From thin-layer sludge separators (5), clarified wastewater through pipelines (K1.2) to raff-anthracite filters (pos. 6), equipped with an aeration system (pos. 6.1), ruff loading (pos. 6.2), anthracite loading (pos. 6.3), drainage charge (pos.6.4) and electro-shutter damper (pos.6.5), filter washing water collection capacity 7, pump (7.1) for washing water discharge, system for stirring the tank (7) for washing water, pump (item 8) for filter drainage through the pipeline (К1.2Н) for disinfection, the pipeline (pos. К1.4Н) of water supply from the clean water tank (pos. 10) is immersed pump (10.1) to flush the filters. In coarse filters (pos. 6), a coagulant solution is supplied through the pipeline (P1) from the complex (pos. 17) for preparing and dosing the coagulant solution.

From the thin-layer sludge separator (pos. 5), the submersible pump (pos. 5.1) provides for the return of activated sludge through the pipeline (pos. 5.1H) to the denitrifier (pos.17), and through the pipeline (K5.2H) excess activated sludge to the sludge collector (pos. .13). From the sludge compactor (pos. 13) by means of a pump (pos. 13.1), the sediment is pumped into the intermediate tank (pos. 14) through the pipeline (pos. K5.3N), and the pressurized water through the pipeline (pos. K18N) is returned to the receiving chamber of the mechanical unit sewage treatment. From the intermediate tank (pos. 14) through the pipeline (K19N), the activated sludge sealed with a screw pump (pos. 15) is sent to the centrifuge for dewatering (pos. 16). At the same time, a flocculant solution from the complex (pos. 18) for preparing and dosing the flocculant solution is provided through the pipeline (pos. P2) to the intermediate tank (pos. 14). From the centrifuge (pos. 16), the cake is discharged into the hopper (pos. 16.1), the centrate is discharged through the pipeline (pos. K20) into the receiving chamber for disinfection of purified water after the filters (pos. 6) is made at the UV disinfection unit (pos. 9) where the effluent enters through the pipeline (pos. K1.2N), and the cleaned and disinfected effluent is discharged through the pipeline (pos. K1.3N) into the reservoir (pos. 10) of clean water. Periodically, the sodium hypochlorite solution prepared in the complex (pos. 19) for the preparation and dosing of the sodium hypochlorite solution is dosed through the pipeline (P3) into the tank (item 10). The complete unit of the sewage treatment plant is equipped with a laboratory for water quality control, which provides for the supply of clean water through the water supply (B1). In addition, automatic monitoring of stations (pos. 20) for measuring BOD5, station (21) for measuring turbidity, station (22) for measuring the content of nitrogen in purified water, and station (23) for measuring the content of phosphorus in water is provided. In a complete unit of a closed sewage treatment plant, a unit (24) for cleaning and disinfecting the air discharged by fans (12) outside the block building is installed.

Figure 1 presents the technological scheme of wastewater treatment and sludge dewatering. Figure 2 shows the block plan at zero. Figure 3 shows the block plan at around 8.0. Figure 4 shows a section of the block on the wastewater treatment tanks.

The following technological processes are provided for in the cleaning technology.

Mechanical cleaning.

- Separation of coarse impurities.

- Separation of sand and pop-up substances.

Biological treatment.

- Denitrifier.

- Aerotank - nitrification.

- Thin-layer desilter.

Tertiary treatment.

- Ruff-anthracite filter.

Disinfection.

- Ultraviolet irradiation (basic).

- Chlorination (sodium hypochlorite - periodic)

Wastewater arrives at the complete unit of the treatment plant with a cylindrical enclosing wall 25 through the pressure collector K1H through the metering unit. Next, the water enters the combined device (item 1) of the RSK-B160-1500-F wastewater filter, consisting of a mechanical grill, aerated sand trap and grease trap. On the fine screen, solid mechanical particles are separated from the wastewater. In a screw washing press, the screenings are washed, dehydrated and pressed. The processed screenings are unloaded into the hopper (pos.1.1). Sand that did not linger on the grid settles in the sand trap. The sand trap is equipped with aeration system and grease trap. Sand is transported by a horizontal conveyor to the unloading conveyor, where the sand is dehydrated and unloaded into the sand bunker (item 1.2). The operation of the sand trap is regulated by timers.

Garbage and sand are transported to landfill sites by road.

After the combined device for filtering wastewater through the K1.1 pipeline, the wastewater purified from mechanical impurities and large wastes flows by gravity into the distribution chamber (item 2). To prevent sedimentation of suspended particles, the distribution chamber is equipped with a perforated agitation system (item 2.1). The winding is carried out periodically with the help of backup blowers (pos. 11). The distribution of wastewater into four parallel lines of technological tanks is carried out using electrified gate valves (pos.2.2) with weirs. Each line of technological tanks consists of the following structures:

- denitrifier (item 3);

- aeration tank - nitrification (item 4);

- thin-layer desilter (item 5);

- ruff-anthracite filter (pos.6);

- the capacity of pure water (item 7).

The following is a description of the operation of one cleaning line.

Sewage from the distribution chamber (item 2) is poured into the denitrifier (item 3). The denitrifier operates in the “mixer” mode, into which the return sludge from the secondary sump (pos. 5) is supplied using submersible recirculation pumps (pos. 5.1). To mix and maintain the sludge in suspension, the denitrifier is equipped with submersible propeller mixers (item 3.1).

Next, the sludge mixture enters the aeration tank - mixer (item 4), operating in the "nitrification" mode. Mixing and saturation of the sludge mixture with oxygen in the aeration tank - mixer is carried out using a system of tubular aerators (item 4.1). This type of aerator belongs to the fine-bubble aeration system. Air is supplied to the aeration tank-mixer aeration system through the air ducts (G1) by centrifugal blowers (item 11).

The sludge mixture from the nitrifying agent (aeration tank - mixer) enters the thin-layer sump (item 5), where the sludge is separated into return sludge through the K5.1N pipeline and clarified sewage through the K 1.2 pipeline. Wastewater is fed into the space between the two submersible baffles directing the flow of water down. The bottom of the sump is made in the form of four cones, each of which is connected to the silt chamber through pipelines. To remove settled sludge from sedimentation tanks and create a recirculation loop in the denitrifier-aeration tank (nitrificator) system, a submersible pump unit is provided in the sludge chamber (item 5.1).

Excess activated sludge (with a moisture content of 99.3-99.4%) is taken from the recirculation circuit of each cleaning line and fed through the K5.2H pipeline to the sludge compactor (item 13). The sludge compactor is designed to collect excess activated sludge from two parallel cleaning lines; there are two total compactors.

After the secondary sump, the clarified sewage flows through the trays into a pressureless ruff-anthracite filter (pos. 6), which is designed for biological treatment of wastewater, and the retention of activated sludge and suspended solids removed from the secondary sump. Filtration in a ruff-anthracite filter is carried out from top to bottom.

To improve the clarification process and to remove phosphorus-containing contaminants from the water, a coagulant solution is introduced into the filter through the P1 pipeline before the water inlet, which is prepared in a special installation (pos. 17) and supplied by metering pumps. Thanks to the aeration system (pos. 6.1), placed under the brush (pos. 6.2), and blowers (pos. 11), the reagent solution is mixed with waste water and additional organic matter is removed. Anthracite filter loading (pos. 6.3) provides deep wastewater treatment from suspended solids.

The collection of filtered water is carried out by a drainage system (pos.6.4) located in the lower filter layer. A group of pumps (pos. 8) is connected to the drainage system, which creates a vacuum in the filter. The pumps are equipped with a frequency converter to regulate performance. This technological solution allows you to maintain a high filtration rate and increase the duration of the filter cycle.

As the suspension of suspended solids increases the hydraulic resistance of the filter and it increases the water level. Upon reaching the maximum acceptable level, anthracite and ruffled filter loading is regenerated with the electric shutter damper 6.5 closed.

Regeneration is carried out periodically, during hours of minimal influx of wastewater (usually at night), by air-water flushing. The duration of regeneration is 15-20 minutes with an intensity of 10 l / s.m2 of water and 20 l / s.m2 of air. Water for flushing is supplied from the clean water tank (item 10) through the K1.4N pipeline using a submersible pump (item 10.1). Slurry water is discharged into the wash water tank (item 7). From the wash water tank using a submersible pump (pos. 7.1), regeneration water is pumped to the aeration tank head (pos. 4) with a uniform flow rate. At the bottom of the wash water tank, a perforated pipe winding system (pos. 7.2) is installed to prevent sedimentation of suspended solids.

After the ruff-anthracite filter, the treated wastewater is pumped (pos. 8) through the K1.2H pipeline to ultraviolet disinfection lamps (pos. 9), and then, through the K1.3H pipeline, under the residual pressure, it is discharged to the established discharge site. Part of the disinfected wastewater is supplied to the storage tank for treated wastewater (item 10), from which process water is taken for the internal needs of the treatment plant complex. Hypochlorite is periodically dosed into the treated wastewater reservoir through the P3 pipeline for disinfection using an automatic dosing unit (key 19). At the bottom of the treated wastewater tank, a perforated percussion system (pos. 10.2) is installed to prevent sedimentation of suspended solids.

Process air is supplied by blowers. A group of blowers is installed in the treatment station to provide basic technological needs (item 11). To reduce the noise level, the blowers are located in soundproof covers.

The strapping of technological equipment and facilities, trays, cassette case with ruff loading are made of stainless steel. To ensure uniform water collection, the drainage edges of the trays are equipped with triangular weirs.

Description of the technological scheme of sludge treatment.

Compressed to a moisture content of 99%, excess activated sludge from the sludge compactor (pos. 13) is periodically pumped through K5.3N pipelines by pumps (pos. 13.1) into an intermediate tank (pos. 14). From the intermediate tank, with the help of screw pumps (pos. 15), the sludge is fed through the K19N pipeline to the dewatering unit, which consists of a centrifuge (pos. 16) and a flocculant preparation plant (pos. 18). Flocculant is supplied through the P3 pipeline. The dose of flocculant is determined in the process of commissioning. Nadilovaya water through pipelines K18N returns to the receiving chamber.

Dehydrated sludge (humidity 75-80%) is sent to the hopper (pos. 16.1) and then transported for burning or disposal. The centrifugal discharge system K20 pipelines is discharged into the receiving chamber.

After cleaning and disinfection, the purified water passes through the measuring tank, in which the sensors of measuring devices for BOD5 (pos. 20), turbidity (pos. 21), nitrogen (pos. 22), phosphates (pos. 23) are placed. Automatic analyzers monitor the quality of purified water and record the main properties at pre-set intervals. The measurement results are transmitted to the central computer of the control system. The remaining required quality indicators of purified water are obtained by conducting laboratory physico-chemical analyzes of water samples performed by a laboratory equipped with a B1 water supply system.

The air that has passed the wastewater treatment bioreactors is collected by fans 12 and passed through the exhaust air treatment and disinfection unit 24.

After treatment, the wastewater indicators correspond to the parameters given in table 1.

Table 1. No. p / p Indicators unit of measurement Numerical value one 2 3 four one Medium reaction pH 6.5-8.5 2 Smell Points <2 3 BOD ₅ mgO ₂ / l 2.0 four COD mgO ₂ / l 15.0 5 Weighted Islands mg / l 3.0 6 Ammonia nitrogen mg / l 0.39 7 Nitrite Nitrogen mg / l 0.02 8 Nitrate Nitrate mg / l 9.1 9 Phosphates mg / l 0.46 10 Oil products mg / l 0.05 eleven SPAS mg / l 0.5

The execution of the enclosing wall of the complete unit of the sewage treatment plant in the form of a circle almost 2 times reduces its thickness, and, consequently, the material consumption of the structure, which significantly affects the cost and volume of investment in construction.

The mutual arrangement of thin-layer sludge separators inside nitrifiers close to the denitrifiers in the center of the circle, as well as the placement of equipment at the sewage treatment plant for dewatering and supplying air above them, allows reducing the communication lengths for water, air and sediment supply inside the complete unit by almost 3 times in comparison with the prototype , which also reduces the cost of pipelines and energy consumption.

Since each complete unit of a closed sewage treatment plant has completed cycles of wastewater treatment and decontamination, sludge dewatering and exhaust air treatment before being discharged into the environment, this creates the convenience of constructing a sewage treatment plant in turn by adding new units of the same design and completeness without performing a large amount of design work, and tying on the site additional blocks of a working structure.

Claims (1)

A complete unit of a closed sewage treatment plant, including biological wastewater treatment tanks by microorganism communities attached to a fiber brush nozzle and consisting of freely floating activated sludge, devices for dewatering sewage sludge, communication systems for wastewater inlet and outlet, air inlet, outlet accumulated precipitation, equipped with thin-layer sludge separators, blowers, equipped with fans, venting moist air, exhausted in bioreactors with the limits of the block building through cleaning and disinfecting devices, characterized in that it is round in plan with the mutual arrangement of thin-layer sludge separators inside the nitrifiers close to the denitrifiers in the center of the circle, as well as equipment for dewatering sediments and air supply above them, ensuring minimum communication lengths for air supply , the supply and disposal of wastewater, the disposal of precipitates for dehydration and corresponds to the performance of a multiple or equal to the first stage of construction station and subsequent lines with a completed cycle of deep wastewater treatment and sludge dewatering.