CN210001653U

CN210001653U - distributed domestic sewage treatment device with units

Info

Publication number: CN210001653U
Application number: CN201920651745.2U
Authority: CN
Inventors: 赵依恒; 黄宝成; 夏雯静; 范念斯; 金仁村
Original assignee: Hangzhou Normal University
Current assignee: Hangzhou Normal University
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-01-31
Anticipated expiration: 2029-05-08

Abstract

The utility model discloses an distributed domestic sewage treatment plant of , the power distribution box comprises a box body, the box top is equipped with the inlet tube, and top-down is equipped with good oxygen filler district, mud collecting region and MBBR denitrogenation district in proper order in the box, be equipped with in the good oxygen filler district and hang the filler, be equipped with the gas pocket on the box lateral wall that corresponds good oxygen filler district, be equipped with the overflow weir in the mud collecting region, the overflow weir is located and hangs the filler below, be equipped with the suspension filler in the MBBR denitrogenation district, be equipped with the outlet pipe on the box lateral wall that corresponds MBBR denitrogenation district, the utility model discloses an good oxygen filler district utilizes sewage gravity to fall the process and realizes oxygenating, need not aeration equipment, reduces the working.

Description

distributed domestic sewage treatment device with units

Technical Field

The utility model relates to a water treatment technical field, concretely relates to kinds of scattered domestic sewage treatment plant.

Background

With the development of social economy and the continuous improvement of the living standard of people, the accompanying environmental problems are increasingly highlighted. Particularly, the water environment problem is serious, the quantity of waste water discharged into a water body is increased continuously while water resources are continuously consumed by people, and the water pollution situation is very severe.

Untreated domestic sewage is discharged randomly, so that the water quality is blackened and smelled, mosquitoes are bred, great threats are directly formed to human health and the environment on which human beings live, drinking water source pollution and eutrophication of lakes and reservoirs can be caused, and the great problem facing human beings is caused by how to treat domestic sewage efficiently.

In recent years, distributed sewage treatment devices are rapidly developed, the process form is also optimized, and the distributed sewage treatment devices are developed into mature wastewater treatment processes.

the distributed sewage treatment process can not only optimize according to the local wastewater yield and water quality characteristics, save land area, facilitate management and operation maintenance, have low technical requirements on operators, and relatively low investment and operation cost, and can realize sustainable development in the aspect of environmental ecology.

The conventional distributed domestic sewage treatment devices are all integrated devices in the horizontal direction, aeration devices are required in aerobic areas, the oxygenation effect in the sewage gravity falling process is not fully utilized, the energy consumption is not reduced, the reaction stages are excessive, the process is complex, the size of the device is relatively large, and integration is difficult to realize in a limited space, so that the simplification, the simplicity and the like of the device are to be optimized .

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the field, the utility model provides an distributed domestic sewage treatment devices, which utilizes the oxygenation effect of the sewage falling process by gravity to realize the oxygen enrichment of the water body, saves aeration equipment, realizes the synchronous carbon and nitrogen removal in reactors and does not need a sludge reflux system.

distributed domestic sewage treatment devices adopting bodies comprise a box body, wherein a water inlet pipe is arranged at the top of the box body, an aerobic filler area, a sludge collection area and an MBBR denitrification area are sequentially arranged in the box body from top to bottom, suspended fillers are arranged in the aerobic filler area, air holes are formed in the side wall of the box body corresponding to the aerobic filler area, an overflow weir is arranged in the sludge collection area and located below the suspended fillers, suspended fillers are arranged in the MBBR denitrification area, and a water outlet pipe is arranged on the side wall of the box body corresponding to the MBBR denitrification area.

Use the distributed domestic sewage treatment plant of ization handles domestic sewage, pending sewage gets into from the inlet tube at box top, the in-process that falls relies on gravity realizes oxygenating, carry out COD's getting rid of and short distance nitration on the suspension filler in aerobic filler district, sewage and the mud that hangs on the filler fall into the overflow weir in the mud collecting region of below, mud deposit is in the overflow weir, sewage overflows and falls into in the MBBR denitrogenation district of below, the growth has anaerobic ammonia oxidation denitrogenation microorganism in the MBBR denitrogenation district, sewage flows out from the outlet pipe after anaerobic ammonia oxidation realizes denitrogenation, go out water COD, ammonia nitrogen and Total Nitrogen (TN) and all reach level A emission standard of national regulation.

Preferably, the top of the box body is provided with a spraying water distributor communicated with the water inlet pipe, so that the sewage is uniformly dispersed.

preferably, the spray water distributor is located above the hanging filler and corresponds to the hanging filler , which is beneficial to evenly spraying domestic sewage on the hanging filler.

Preferably, the filling volume ratio of the suspended filler in the aerobic filler zone is 50-70%. Under the filling rate, the COD removal rate of the domestic sewage is higher.

Preferably, the suspended filler is a biofilm filler, the biofilm growing on the suspended filler can effectively remove COD, partial short-cut nitrification is realized, and partial NH is removed₄ ^-Conversion of-N to NO₂ ^--N。

Preferably, the overflow weir adopts a drawer type design, aged sludge naturally falling off from the suspended filler is collected behind the overflow weir, and the sludge is periodically removed by portable pulling.

Preferably, the volume filling degree of the suspended filler in the MBBR denitrification area is 30-70%. Under the condition, the denitrification effect is optimal.

Preferably, the suspended filler is a particle filler, so that the sludge attachment amount can be remarkably increased, and the treatment effect can be improved.

For the pollutant that takes place the short current in preventing the MBBR denitrogenation district and lead to denitrogenation microorganism can't carry out effective contact with in the waste water, as preferred, be equipped with the fender of infundibulate in the MBBR denitrogenation district and flow the board, keep off and flow the board and be located the overflow weir under, the outlet pipe is fixed and is kept off on the board.

Preferably, the water outlet pipe is connected with an internal circulating pump, and the water outlet of the internal circulating pump is communicated with the water inlet pipe to realize sewage backflow.

Preferably, the ratio of the circulating water quantity of the internal circulating pump to the domestic sewage water inflow is 0.3-1: 1, and the oxygenation effect of the aerobic filler area is improved, so that the system treatment effect is enhanced.

Preferably, the water inlet pipe and the water outlet pipe are both provided with grids for filtering.

Preferably, the bottom of the box body is provided with a sludge discharge port for discharging sludge.

Compared with the prior art, the utility model, main advantage includes:

(1) the aerobic filler zone realizes oxygenation by utilizing the sewage gravity falling process, does not need an aeration device and reduces the operating cost.

(2) The aerobic zone has no sludge backflow, and the energy consumption is reduced.

(3) The adopted activated sludge is mature and high in activity, can be quickly started after short-term domestication, and is put into use.

(4) The reaction process is simplified, and the two-stage reaction realizes synchronous carbon and nitrogen removal.

Drawings

FIG. 1 is a schematic structural view of an integrated distributed domestic sewage treatment apparatus according to embodiment 1;

in the figure: a water inlet tank 1; a lift pump 2; a water inlet pipe 3; a spray water distributor 4; an aerobic filling area 5; a sludge collection area 6; an overflow weir 7; air holes 8; a flow baffle 9; a water outlet pipe 10; an internal circulation pump 11; a sludge discharge port 12; an MBBR denitrification zone 13; an internal recycle stream 14; hanging soft filler 15; suspended particulate filler 16.

Detailed Description

The invention will now be described in further with reference to the accompanying drawings and specific examples, it being understood that the examples of the invention are for the purpose of illustration only and are not intended to limit the scope of the invention.

Example 1

The integrated distributed domestic sewage treatment device of the embodiment is shown in fig. 1, and comprises a water inlet component, a box body and an internal circulating pump 11.

The water intake assembly includes a water intake tank 1 and a lift pump 2.

The top of the box body is provided with a water inlet pipe 3 with a grid and a spraying water distributor 4. The water inlet tank 1, the lift pump 2, the water inlet pipe 3 and the spray water distributor 4 are connected in sequence. The spraying water distributor 4 can realize the uniform dispersion of sewage.

An aerobic filling area 5, a sludge collecting area 6 and an MBBR denitrification area 13 are sequentially arranged in the box body from top to bottom.

The aerobic filler zone 5 is internally provided with a suspended soft filler 15, and the suspended soft filler 15 is positioned below the spray water distributor 4, so that domestic sewage can be uniformly sprayed on the suspended soft filler 15.

The filling volume ratio of the suspended soft filler 15 in the aerobic filler zone 5 is 60 percent. Can obtain higher COD removal rate.

The hanging soft filler 15 is a biofilm filler. The biological film growing on the suspended soft filler 15 can effectively remove COD, realize partial short-cut nitrification of sewage and remove partial NH₄ ^-Conversion of-N to NO₂ ^--N。

The side wall of the box body corresponding to the aerobic filler area 5 is provided with air holes 8 which are uniformly distributed, so that the oxygenation effect of the system can be improved.

An overflow weir 7 is arranged in the sludge collecting area 6, and the overflow weir 7 is positioned under the suspended soft filler 15. The overflow weir 7 is made of plastic and is designed in a drawer type, and aged biological membranes naturally falling off from the suspended soft filler 15 are collected behind the overflow weir 7 and are pulled in a portable mode to realize the periodic removal of sludge.

Anaerobic ammonia oxidation denitrification microorganisms grow in the MBBR denitrification area 13, suspended particle fillers 16 made of PVC materials are arranged, sludge attachment can be remarkably improved, and the treatment effect is improved.

A sludge discharge port 12 and a water outlet pipe 10 with a grid are arranged on the side wall of the box body corresponding to the MBBR denitrification area 13. The water outlet pipe 10 is positioned above the sludge outlet 12.

The volume filling degree of the suspended particle filler 16 in the MBBR denitrification area 13 is 50 percent, and the best denitrification effect can be obtained.

In order to prevent the short flow in the MBBR denitrification area 13 from causing the denitrification microorganisms to be unable to effectively contact with the pollutants in the wastewater, a funnel-shaped flow baffle plate 9 is arranged in the MBBR denitrification area 13, and the flow baffle plate 9 is positioned under the overflow weir 7. The section size of the upper edge of the flow baffle plate 9 is smaller than the bottom surface of the overflow weir 7, so that the overflowing sewage can not directly enter the inner space enclosed by the flow baffle plate 9.

The water outlet pipe 10 extends into the MBBR denitrification area 13 and is fixed on the flow baffle plate 9.

The water outlet pipe 10 is provided with a branch, an internal circulating pump 11 is connected to the branch, and the water outlet of the internal circulating pump 11 is communicated with the water inlet pipe 3 to form an internal circulating flow 14 of sewage.

The ratio of the circulating water quantity of the internal circulating pump 11 to the domestic sewage water inflow quantity of the lifting pump 2 is controllable and is 0.3-1: 1, and the oxygenation effect of the aerobic filler area 5 is improved, so that the system treatment effect is enhanced.

The -integrated distributed domestic sewage treatment device of the embodiment is used for treating domestic sewage, the domestic sewage subjected to primary sedimentation pretreatment enters from the water inlet pipe 3 at the top of the box body through the water inlet tank 1 and the lifting pump 2, oxygenation is realized in the process of falling by gravity, COD (chemical oxygen demand) removal and short-cut nitrification reaction are carried out on the suspended soft filler 15 of the aerobic filler area 5, sewage and a biofilm suspended on the suspended soft filler 15 fall into the overflow weir 7 in the sludge collection area 6 below, an aged biofilm is deposited in the overflow weir 7, the sewage overflows and falls into the MBBR denitrification area 13 below, anaerobic ammonia oxidation denitrification microorganisms grow in the MBBR denitrification area 13, the sewage flows out from the water outlet pipe 10 after denitrification is realized by anaerobic ammonia oxidation reaction, and part of the treated sewage flows back to the aerobic filler area 5 through the internal circulating pump 11 to enter for strengthening treatment.

Application example 1

The integrated and distributed domestic sewage treatment device in the embodiment 1 is adopted to treat domestic sewage, and the basic conditions of the quality of the domestic sewage are 36.87mg/L ammonia nitrogen and 350.24mg/L COD.

After the integrated distributed domestic sewage treatment device stably operates, the concentration of ammonia nitrogen in the effluent is less than 5mg/L, the COD is less than 50mg/L, the effluent meets the level A standard of pollutant discharge Standard of urban sewage treatment plants (GB118918-2002), and the effluent can be directly discharged or reclaimed.

Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the above description of the present invention, and such equivalents also fall within the scope of the appended claims.

Claims

1, distributed domestic sewage treatment units of , including the container body, characterized by that, the top of said container body has water inlet pipes, there are aerobic filler areas, mud collection area and MBBR denitrogenation area sequentially from top to bottom in the container body;

the aerobic filler zone is internally provided with suspended fillers, and the side wall of the box body corresponding to the aerobic filler zone is provided with air holes;

an overflow weir is arranged in the sludge collecting region and is positioned below the suspended filler;

the MBBR denitrification area is internally provided with a suspended filler, and a water outlet pipe is arranged on the side wall of the box body corresponding to the MBBR denitrification area.

2. The decentralized domestic sewage treatment plant according to claim 1, wherein the top of the tank is provided with a spray distributor in communication with a water inlet pipe.

3. The distributed domestic sewage treatment plant according to claim 1, wherein the packing volume ratio of the suspended packing in the aerobic packing zone is 50-70%.

4. The decentralized domestic sewage treatment plant according to claim 1 or 3, wherein the suspended filler is a biofilm filler.

5. The decentralized domestic sewage treatment plant according to claim 1, wherein the overflow weir is of drawer design.

6. The distributed domestic sewage treatment apparatus according to claim 1, wherein the volume ratio of the suspended filler in the MBBR denitrification zone is 30-70%.

7. The decentralized domestic sewage treatment plant according to claim 1 or 6, characterized in that the suspended filler is a particulate filler.

8. The distributed sewage treatment apparatus of claim, wherein a funnel-shaped baffle plate is disposed in the MBBR denitrification region, the baffle plate is located under the overflow weir, and the outlet pipe is fixed on the baffle plate.

9. The decentralized domestic sewage treatment plant according to claim 1, wherein the outlet pipe is connected to internal circulation pump, the outlet of which is connected to the inlet pipe.

10. The distributed domestic sewage treatment apparatus as claimed in claim 9, wherein the ratio of the circulating water volume of the internal circulating pump to the domestic sewage inflow volume is 0.3-1: 1.