CN201614333U - Decentralized sewage treatment device - Google Patents

Abstract

The utility model discloses a decentralized sewage treatment device, which belongs to technical field of biological chemical sewage treatment and sewage resource utilization. The device overcomes the disadvantages of the conventional decentralized onsite sewage treatment recovery technique, such as huge investment, low nitrogen removal efficiency, complex operation and maintenance, high cost, and poor adaptability to the economic conditions of rural areas in China. The decentralized sewage treatment device consists of a first aerobic tank, a first anoxic tank, a second aerobic tank, a second anoxic tank, a third aerobic tank, a sedimentation tank, and an aeration system, and is also provided with a water inlet pipe, a water outlet pipe, a guide plate and a water distribution weir. The decentralized sewage treatment device has the advantages of reasonable design, low manufacture and operation costs, reliable operation, and can achieve popularization and application of the decentralized sewage treatment technique.

Description

A kind of decentralized wastewater treatment unit

Technical field

The utility model relates to the saprobia chemical treatment and sewage recycling utilizes technical field, is meant a kind of decentralized wastewater treatment unit especially, is applicable to the sewage on-the-spot disposal in scattered settlement district relatively such as rural area, sanatorium, travel resort.

Background technology

Relatively be subjected to extensive concern, and formed the municipal sewage treatment of industry, the sewage disposal in rural area still is a difficult problem of environmental improvement at present.Because the life in the countryside source of pollution disperse, be difficult for concentrating, add that economic level is backward relatively, account for the vast rural area of national total area nearly 90%, 96% village does not have discharge conduit and Sewage treatment systems.Undressed sanitary sewage is brought each pollutant into river by point source and non-point source discharging, and all kinds of water sources of severe contamination become the important source of pollution that influence the water body environment quality.

At municipal sewage treatment, build the municipal sewage plant, the general activated sludge process that adopts, in order to improve processing efficiency, reach the purpose of denitrogenation dephosphorizing, general sewage treatment process all is provided with mud and refluxes and the mixed-liquor return system, and not only construction investment height, and working cost, unit cost of sewage disposal also improve greatly.As seen, concentrated sewage disposal technology can not simply be applied to the rural decentralized wastewater processing.

Handle at rural decentralized wastewater, use more having at present: the purifying pond system, artificial wet land system, soil filtration system etc., purifying pond, artificial swamp and soil filtration system floor space are big, and artificial swamp and soil filtration system easily stop up and lose treatment effect, the purifying pond system needs the rural area to have just economically feasible of available pond, in recent years, there is the new membrane bio-reactor to be applied to the example that decentralized wastewater is handled abroad, though the membrane bioreactor floor space is little, involve great expense the running maintenance complexity, the expense height is not suitable for the economic situation in China rural area.

Summary of the invention

At the problems referred to above, the utility model is developed cover cost-effective decentralized wastewater treatment unit--a multistage composite A/O decentralized wastewater treatment unit, under the prerequisite that guarantees denitrification effect, saving mud refluxes and the mixed-liquor return system, reduce excess sludge production, reduce construction investment and working cost.

The utility model is realized by following technical solution:

A kind of multistage composite A/O decentralized wastewater treatment unit comprises pond body, filler and air-blast system composition.

Described pond body is made up of 3 grades of Aerobic Ponds, 2 grades of anoxic pond and settling tank,

Described filler is installed on Aerobic Pond and anoxic pond respectively.

Described air-blast system comprises gas blower, gas pipe line and aerating apparatus composition.

Described Aerobic Pond, anoxic pond and settling tank adopt integral type to arrange, do not need connecting pipe, save floor space and construction investment.

Described Aerobic Pond and anoxic pond are arranged at interval, form aerobic-anaerobic-aerobic-anaerobic-aerobic series, do not need to establish sludge reflux pump and mixed-liquor return pump, have therefore saved working cost;

Described Aerobic Pond, anoxic pond and settling tank inlet segment are equipped with flow deflector and overflow cloth mill weir.Flow deflector is a flat board, and it is equal that push up in its upper end and pond, the lower end apart from the pond at the bottom of certain distance, overflow cloth mill weir lower end links to each other with at the bottom of the pond, the upper end is the triangle effluent weir, and is equal with water level.

Described settling tank water exit end is provided with the V-notch weir outlet system.

Biofilm packing all is installed in described Aerobic Pond, the anoxic pond,, forms active sludge-microbial film recombining process, effectively improve the system biological amount for attached growth of microorganisms.

Described Aerobic Pond bottom is equipped with aerating apparatus, with to system's oxygen supply, keeps microbic activity;

Microbial film in the described Aerobic Pond can form aerobic-anoxic-anaerobic environment that goes forward one by one from outside to inside, for each quasi-microorganism of denitrogenation dephosphorizing provides suitable living environment;

Microbial film in the described oxygen-starved area can form anoxic-anaerobic environment that goes forward one by one from outside to inside, can provide suitable living environment for the microorganism of denitrogenation dephosphorizing equally.

In the utility model, sewage is successively through first Aerobic Pond-first anoxic pond-second Aerobic Pond-second anoxic pond-the 3rd Aerobic Pond and settling tank, do not need mud to reflux and mixed-liquor return, biofilm packing all is installed in Aerobic Pond and anoxic pond, make it form a microbial film-active sludge compound A/O system, the sewage that evenly enters from feed-water end contacts with the active sludge thorough mixing with microbial film in first Aerobic Pond and carries out biological respinse, make organic pollutant obtain degraded, nitrogen nitrogen takes place nitrated, form nitric nitrogen, the water that contains nitric nitrogen enters first anoxic pond, organism in the denitrifying bacteria utilization water inlet is nitrogen with nitrate-nitrogen reduction, water further enters second Aerobic Pond afterwards, further removes residual organic substances and ammonia nitrogen in the sewage, passes through anoxic pond again, make denitrogenation more thorough, through the 3rd Aerobic Pond, guarantee organism and ammonia nitrogen removal in the sewage at last, after the settling tank mud-water separation, reach emission standard.

The utility model adopts alternately aerobic/anoxic process, can overcome ordinary activated sludge process sludge expansible problem, makes the system can steady running, is easy to safeguard.

The utility model adopts microbial film-active sludge recombining process, can effectively reduce excess sludge production, and long-time running shows, can not establish the mud storage pool.

The utility model has been realized the combination of activated sludge process and biomembrane process, by two-stage A/O technology, when improving processing efficiency, has realized saving land, the energy-conservation and purpose that reduces discharging.

The utlity model has following advantage:

1, structure of reactor compactness of the present utility model, structure is succinct, and operation is simple with maintenance.

2, the utility model adopts integral structure to form independently anoxic pond, Aerobic Pond and settling tank, has effectively saved floor space.

3, reactor of the present utility model exists microbial film and active sludge simultaneously in anoxic pond and Aerobic Pond, thereby can improve biomass greatly, for nitrifier, denitrifying bacteria and dephosphorization bacterial provide suitable life condition, and then the raising sewerage dephosphorization and denitrification effect, reduce construction investment and working cost.

4, the utility model does not need mixed-liquor return and mud to reflux, and has saved power consumption;

5, the microorganism generation cycle of active sludge-microbial film recombining process long, sludge output is few, has saved sludge treatment equipment, helps energy-conservation and save land.

6, avoided because the effluent quality problem not up to standard that activated sludge bulking brings.

7, shock-resistant ability is strong, can not cause biofilm detachment owing to the unexpected fluctuation of water quality in the certain load scope.

8, by the circulation of anoxic, anaerobic and aerobic, can effectively improve sludge settling and dewatering.

In a word, a kind of decentralized wastewater treatment unit of the present utility model adopts integrated design, by adopting active sludge and microbial film recombining process, through multi-stage aerobic-anoxic process, not only can improve processing efficiency, and save initial cost and working cost effectively, be a kind of Sewage treatment systems with very high practical value.

Description of drawings

Fig. 1 is the synoptic diagram of a kind of decentralized wastewater treatment unit of the utility model;

Reference numeral

1. water inlet pipe 2. fillers 3. flow deflectors

4. flow deflector 5. flow deflectors 6. flow deflectors

7. flow deflector 8. flow deflectors 9. cloth mill weirs

10. cloth mill weir 11. cloth mill weirs 12. cloth mill weirs

13. effluent weir 14. effluent weirs 15. rising pipes

16. first Aerobic Pond, 17. first anoxic pond, 18. second Aerobic Ponds

19. second anoxic pond, 20. back Aerobic Pond 21. settling tanks

22. aerating apparatus 23. aerating apparatuss 24. gas blowers

25. gas pipe line 26. sludge pipes

Embodiment

A kind of decentralized wastewater treatment unit of the utility model, with reference to Fig. 1, this treatment unit comprises first Aerobic Pond 16, first anoxic pond 17, second Aerobic Pond 18, second anoxic pond 19, the 3rd Aerobic Pond 20, settling tank 21, aerating apparatus 22,23, gas blower 24 and gas pipe line 25 are formed, each pond body links to each other successively, can be made of one the formula skid-mounted device with aerating system.

Sewage is at first by water inlet pipe 1, enter first Aerobic Pond 16 through flow deflector 3, fully contact with active sludge microorganism with the microbial film in it, organic pollutant obtains degraded, ammonia nitrogen is oxidized to nitric nitrogen, mixed solution enters first anoxic pond 17 by flow deflector 4 and cloth mill weir 9, organism in the sewage that microbial film in it and active sludge microorganism utilization are entered by water inlet pipe 2, carry out denitrification, with nitrate-nitrogen reduction nitrogen in the mixed solution, mixed solution continues to enter second Aerobic Pond 18 through flow deflector 5 and cloth mill weir 10 afterwards, after remaining organism and ammonia nitrogen carried out oxygenolysis, enter second anoxic pond 19 through flow deflector 6 and cloth mill weir 11 again, microbial film and active sludge microorganism in it further utilize internal carbon source to carry out denitrification denitrogenation, mixed solution enters the 3rd Aerobic Pond 19 through flow deflector 7 and cloth mill weir 12 afterwards, up to standard to guarantee organism and ammonia nitrogen, after effluent weir 13 and flow deflector 8 enter settling tank 21, carry out mud-water separation, water outlet enters rising pipe 27, qualified discharge through effluent weir 14.In treating processes, the gas blower 24 in the aerating system supplies air by gas pipe line 25 and aerating apparatus 22,23 continuously to first Aerobic Pond 16, second Aerobic Pond 18 and the 3rd Aerobic Pond 20, to guarantee its inner microbic activity.

Through test, the outer draining after a kind of decentralized wastewater treatment unit described in the utility model is handled can be stablized and reached national GB18918-2002 " urban wastewater treatment firm pollutant emission standard " one-level B mark.For identical process object, treatment effect of the present utility model and efficient are a little more than prior art, and running cost can save 10%, and construction investment can be saved about 15%.

Claims (4)

1. decentralized wastewater treatment unit, comprise first Aerobic Pond (16), first anoxic pond (17), second Aerobic Pond (18), second anoxic pond (19), the 3rd Aerobic Pond (20), settling tank (21) and aerating system (22,23,24,25,25), form aerobic-anaerobic-aerobic-anoxic-aerobic again treating processes, do not need mud backflow and mixed-liquor return system can realize denitrogenation and dephosphorization.

2. a kind of decentralized wastewater treatment unit as claimed in claim 1, it is characterized in that: first Aerobic Pond (16), first anoxic pond (17), second Aerobic Pond (18), second anoxic pond (19), the 3rd Aerobic Pond all are equipped with the plaited curtain type soft-filler in (20), and the filler packing density is 10-30%.

3. a kind of decentralized wastewater treatment unit as claimed in claim 1, it is characterized in that: first Aerobic Pond (16), first anoxic pond (17), second Aerobic Pond (18), second anoxic pond (19), the 3rd Aerobic Pond (20) links to each other successively with settling tank (21), and respectively in first Aerobic Pond (16), first anoxic pond (17), second Aerobic Pond (18), second anoxic pond (19), the feed-water end of the 3rd Aerobic Pond (20) is provided with flow deflector and overflow cloth mill weir, flow deflector is a flat board, its upper end is equal with the top, pond, the lower end apart from the pond at the bottom of certain distance, overflow cloth mill weir lower end links to each other with at the bottom of the pond, the upper end is the triangle effluent weir, and is equal with water level.

4. a kind of decentralized wastewater treatment unit as claimed in claim 1 is characterized in that: first Aerobic Pond (16), first anoxic pond (17), second Aerobic Pond (18), second anoxic pond (19), the 3rd Aerobic Pond (20) and settling tank (21) can be made of one the formula skid-mounted device with aerating system.