CN206886895U - A kind of domestic sewage in rural areas integrated equipment for wastewater treatment - Google Patents

Abstract

The utility model discloses a kind of domestic sewage in rural areas integrated equipment for wastewater treatment.The equipment includes anaerobic pond successively（1）, anoxic pond（2）, Aerobic Pond and sedimentation basin（4）；The anaerobic pond（1）, anoxic pond（2）, Aerobic Pond and sedimentation basin（4）In same housing, and each pond is separated by dividing plate.Domestic sewage in rural areas integrated processing technique based on the equipment comprises the following steps：（1）Anaerobic pond releases phosphorus；（2）Anoxic pond denitrification denitrogenation；（3）Aerobic Pond nitrifies；（4）Sedimentation basin precipitates；（5）Overflow drainage.The utility model device construction is succinct, and easily operated, floor space is small, and operating cost is low, improves the efficiency of denitrogenation dephosphorizing, suitable for the processing of domestic sewage in rural areas.

Description

A kind of domestic sewage in rural areas integrated equipment for wastewater treatment

Technical field

The utility model belongs to urban sewage treatment technology field, and in particular to a kind of domestic sewage in rural areas integrated treatment Equipment.

Background technology

China western part is vast in territory, and land area is 5,590,000 square kilometres, accounts for the 59% of the national soil gross area；But people Mouth is more sparse, is shown according to the 5th census data, 6 provinces such as black, sweet, illiteracy, new, blue or green, Tibetan（Area）, population 1.13 hundred million People, the 9% of country's total population are only accounted for, average every square kilometre of 20 people, the density of population average well below the whole nation.These areas It is located in borderland and inland, more high mountains, plateau and desert, natural conditions are poor, and exploitation history is slower, has inconvenient traffic, economic base is thin It is weak, it is sparsely populated.Rural area is different from city, and western countryside distribution is scattered, and its sewage discharge is wide and scattered, rural area casual household life Sewage can not focus on a large scale, if its sanitary sewage is focused on more difficult.The still more uses in China rural area at present fall The methods of rear methane-generating pit, handles sewage, and treatment technology effluent quality is poor, is unable to reach《Urban wastewater treatment firm pollutant is arranged Put standard》One-level A standards.

The technical know-how of Denitrifying Phosphate Accumulating Organisms is using nitrate nitrogen or nitrite nitrogen as electronics using Denitrifying Phosphate Accumulating Organisms Acceptor, synchronize denitrogenation dephosphorizing.Kuba(1996)^[1]Et al. shown by stoichiometry, based on denitrification dephosphorization principle The double sludge systems of A2/NSBR, COD and O needed for it₂Consumption reduces by 50% and 30% respectively than traditional denitrification dephosphorization system, Sludge yield accordingly reduces 50%（K Hamada,T Kuba,V Torrico,et al.2006.Comparison of nutrient removal efficiency between pre- and post-denitrification wastewater treatments[J].Water science and technology,53(9):169~175.）.Liu Gang (2013) etc.^[2]Grind The person of studying carefully controls aerobic phosphorus absorption by adding acetic acid to AOA-SBR technique aerobic sections, and denitrification dephosphorization is successfully realized in anoxic zone （Liu Gang, Chen Jianyu, Huang Rongxin, wait the low C/N of the new rear-mounted denitrification PROCESS FOR TREATMENTs of .2013.（C/P）Than sewage denitrification and dephosphorization property [J] ACTA Scientiae Circumstantiaes, 33 (11) can be studied:2979-2986.）.Wang Xiaolian etc. (2005)^[3]Confirmed by experiment in A2/ In O techniques, denitrification dephosphorization phenomenon be present, and the effect of preferable synchronous denitrification dephosphorizing can be obtained（Wang Xiaolian, Wang Shuying, horse Bravely, influence [J] the Journal of Chemical Industry and Engineering of denitrification dephosphorization and excess aeration to biological phosphate-eliminating, 56 (8) in .2005. A2O techniques are waited: 1565-1570.）.

Anaerobism, anoxic alternate run environment in, be easier enrichment with denitrification dephosphorization effect facultative micro- life Thing.In order to preferably solve the problems, such as rural area casual household's Sewage Pollution environment, the utility model is by increasing anoxic mixed liquor The problem of backflow, overcomes in A2/O, and Denitrifying Phosphate Accumulating Organisms can not access effective enrichment, alleviates life to a certain extent Thing denitrogenation and the direct contradiction of biological phosphate-eliminating.

The utility model has floor space small, and concise in technology, operating cost is low, safeguards simple, stable effluent quality etc. Advantage, have broad application prospects.

Utility model content

The utility model purpose is in view of the shortcomings of the prior art, anti-not increasing using denitrification dephosphorization principle as guidance Answer on the premise of body accumulates, it is small to design and develop out floor space, concise in technology, can make full use of carbon source, and Nitrogen/Phosphorus Removal is excellent A kind of different domestic sewage in rural areas integrated equipment for wastewater treatment.

The utility model purpose is achieved through the following technical solutions.

A kind of domestic sewage in rural areas integrated equipment for wastewater treatment, including anaerobic pond, anoxic pond, Aerobic Pond and sedimentation basin；It is described Anaerobic pond, anoxic pond, Aerobic Pond and sedimentation basin are in same housing, and each pond is separated by dividing plate；

The Aerobic Pond is divided into the first Aerobic Pond and the second Aerobic Pond；

The anaerobic pond is separated with anoxic pond by dividing plate, and the dividing plate bottom for separating anaerobic pond and anoxic pond is provided with the One crosses water ravine, and the sewage in sewage disposal process crosses water ravine by first and flows into anoxic pond from anaerobic pond；

The anoxic pond is separated with the first Aerobic Pond by dividing plate, in the dividing plate for separating anoxic pond and the first Aerobic Pond Portion is provided with second and crosses water ravine, and the sewage in sewage disposal process crosses water ravine by second and flows into the first Aerobic Pond from anoxic pond； Separate anoxic pond and the dividing plate of the first Aerobic Pond is fixed by zigzag neck, and zigzag neck is arranged in metal guide rail, Position of the zigzag neck in metal guide rail can be freely adjusted as needed, realize the first Aerobic Pond volume-tunable；

The dividing plate for separating the first Aerobic Pond and the second Aerobic Pond is provided with the 3rd and crosses water ravine, the sewage in sewage disposal process Water ravine, which is crossed, by the 3rd flows into the second Aerobic Pond from the first Aerobic Pond；

The sedimentation basin is separated with the second Aerobic Pond by dividing plate, is separated in the dividing plate of sedimentation basin and the second Aerobic Pond Portion is provided with 3 water distributors, and 3 water distributors are uniformly distributed on same plane, and the sewage in sewage disposal process passes through cloth Water pipe is intake vertically downward from the second Aerobic Pond to sedimentation basin, ensures the deposition efficiency of sedimentation basin；

The bottom of the anaerobic pond is provided with the first mechanical stirring device；The bottom of the anoxic pond is provided with the first aeration Head and the second mechanical stirring device；The anoxic pond is additionally provided with evacuation port；The anoxic pond also by the first reflux line and First reflux pump is connected with anaerobic pond；

The bottom of first Aerobic Pond and the second Aerobic Pond is provided with the second aeration head uniformly arranged, often row's aeration Head passes through independent Air Valve Control aeration quantity；Second Aerobic Pond also passes through the second reflux line and the second reflux pump and anoxic Pond connects；

The sedimentation basin is rectangular sedimentation tank；The sedimentation basin bottom is provided with 3 sludge hoppers；The sludge hopper is parallel In water (flow) direction, and a discharge pipeline is respectively inserted inside each sludge hopper；The discharge pipeline is perpendicular to water (flow) direction；3 spoil disposals The bottom of sedimentation basin is stretched out in pipe one end, and external part is connected after merging into one outlet by threeway, a passage of threeway with Blowoff chamber is connected, and another article of passage of threeway is connected by the 3rd return duct and the 3rd reflux pump with anaerobic pond；

Three discharge pipelines close three and not only improve uniform spoil disposal for one, and convenient operation, avoids sludge in three sludge hoppers again Middle uneven distribution and cause aqueous suspension raise；

The water inlet of equipment is arranged on anaerobic pond front end, and the delivery port of equipment is arranged on the rear end of sedimentation basin, close to equipment Water outlet is provided with effluent weir, and baffle plate is provided with before effluent weir to retain water surface scum silica frost.

Further, the sludge hopper is chamfered edge mesa-shaped, and upper bottom is 2 with the perimeter length ratio gone to the bottom:1；The shape of chamfered edge platform Shape can effectively concentrate sludge, avoid producing spoil disposal dead angle, so as to cause to cause second pond denitrification because pond body sludge remains So that Mud up-floating, the stable water outlet of technique is influenceed.

Further, the effluent weir is shaped as zigzag.

Further, in the Aerobic Pond the second aeration head distribution than in anoxic pond the first aeration head it is densely distributed.

Further, the dissolved oxygen in the second Aerobic Pond outlet water at tail end is between 1.0 mg/L-1.5 mg/L.

Further, the partial isometry of the discharge pipeline insertion sludge hopper, which leaves, is uniformly provided with aperture, is advantageous to sludge hopper In sludge uniformly flow into discharge pipeline, sludge residual, accumulation will not be formed caused by spoil disposal is uneven.

Further, Denitrifying Phosphate Accumulating Organisms are contained by anoxic-anaerobism backflow enrichment in the anaerobic pond；The anoxic pond It is interior to contain denitrifying bacteria and Denitrifying Phosphate Accumulating Organisms；Contain nitrifier and Denitrifying Phosphate Accumulating Organisms in the Aerobic Pond.

A kind of domestic sewage in rural areas integrated processing technique based on the said equipment, comprises the following steps：

（1）Anaerobic pond releases phosphorus：Domestic sewage in rural areas enters anaerobic pond by water inlet, is gathered in anaerobic pond by denitrification Phosphorus bacterium completes to release phosphorus；

（2）Anoxic pond denitrification denitrogenation：Anaerobic pond, which releases the sewage after phosphorus and crosses water ravine by first, enters anoxic pond, anoxic pond In denitrifying bacteria using the COD in sewage as carbon source to nitrate carry out denitrification, realize denitrogenation；

（3）Aerobic Pond nitrification inhales phosphorus：Sewage in anoxic pond after denitrogenation by reflux ratio 150% by the first reflux line and First reflux pump is back to anaerobic pond, and remaining sewage crosses water ravine by second and enters Aerobic Pond, the nitrobacteria in Aerobic Pond Nitrification under, mineralized nitrogen is the nitrogen of nitrate state, and completes aerobic phosphorus absorption；

（4）Sedimentation basin precipitates：Sewage after Aerobic Pond nitrification passes through the second reflux line and the by reflux ratio 200% Two reflux pumps are back to anoxic pond from the second Aerobic Pond, and remaining sewage is flowed into sedimentation basin by water distributor, and sewage is precipitating Advection in pond, and because sludge self gravitation completes sludge settling；

（5）Overflow drainage：After the sludge precipitated in sedimentation basin is collected by sludge hopper, sludge presses reflux ratio 70%-80% Anaerobic pond is back to by the 3rd return duct and the 3rd reflux pump, remaining sludge is discharged into blowoff chamber；Processing after mud-water separation Water is discharged by effluent weir overflow and from delivery port.

Further, step（1）In, the flow velocity that sewage enters anaerobic pond is the m3/h of 1.2 m3/h ~ 2.

Further, sewage is the h of 8 h ~ 10 in the hydraulic detention time of whole integration apparatus.

Compared with prior art, the utility model has the following advantages that and beneficial effect：

（1）The utility model device construction is succinct, and easily operated, floor space is small；Each pond is completed in same housing, It is easy to manage；And sedimentation basin carries out efficiently separating for muddy water using gravity and is not required to increase operation power consumption, reduces operating cost；

（2）The utility model adds residence time of the Denitrifying Phosphate Accumulating Organisms in anaerobic pond, and reduces nitrate and exist Anaerobic pond releases Denitrifying Phosphate Accumulating Organisms the influence of phosphorus；

（3）The utility model is directed to the characteristics of domestic sewage in rural areas low-carbon-source, makes full use of the COD in sewage, and alleviate The competitive relation of polyP bacteria and denitrifying bacteria, improve the efficiency of denitrogenation dephosphorizing；

（4）Preferable to COD, TP and TN treatment effect based on the water treatment technology of the utility model device, water outlet COD can Reach 20 below mg/L, below the mg/L of total phosphorus water outlet 0.5, below the mg/L of water outlet ammonia nitrogen 1.0, every effluent quality index is equal Reach and be higher than《Urban wastewater treatment firm pollutant emission standard》One-level A standards.

Brief description of the drawings

Fig. 1 is a kind of structural representation of domestic sewage in rural areas integrated equipment for wastewater treatment of the utility model；

Fig. 2 is that removal effect figure of the actual sewage to ammonia nitrogen is handled in embodiment 1；

Fig. 3 is that removal effect figure of the actual sewage to total nitrogen is handled in embodiment 1；

Fig. 4 is that removal effect figure of the actual sewage to COD is handled in embodiment 1；

Fig. 5 is that removal effect figure of the actual sewage to total phosphorus is handled in embodiment 1.

Embodiment

Below in conjunction with drawings and examples, the utility model is described in further detail, but the utility model is claimed Scope is not limited to the scope described in specific embodiment.

A kind of structural representation of domestic sewage in rural areas integrated equipment for wastewater treatment of the utility model as shown in figure 1, wrap successively Include anaerobic pond 1, anoxic pond 2, Aerobic Pond and sedimentation basin 4；Anaerobic pond 1, anoxic pond 2, Aerobic Pond and sedimentation basin 4 are in same housing It is interior, and each pond is separated by dividing plate；Aerobic Pond is divided into the first Aerobic Pond 3-1 and the second Aerobic Pond 3-2；Anaerobic pond 1 includes There are Denitrifying Phosphate Accumulating Organisms；In anoxic pond 2 phosphorus bacterium is released containing denitrifying bacteria and denitrification；Contain nitrifier and anti-nitre in Aerobic Pond Change polyP bacteria；

Anaerobic pond 1 is separated with anoxic pond 2 by dividing plate, and the dividing plate bottom for separating anaerobic pond 1 and anoxic pond 2 is provided with the One crosses water ravine 5, and the sewage in sewage disposal process crosses water ravine 5 by first and flows into anoxic pond 2 from anaerobic pond 1；

Anoxic pond 2 and the first Aerobic Pond 3-1 is separated by dividing plate, separates the Aerobic Pond 3-1 of anoxic pond 2 and first dividing plate Middle part be provided with second and cross water ravine 6, the sewage in sewage disposal process crosses water ravine 6 by second and flows into first from anoxic pond 2 Aerobic Pond 3-1；Separate anoxic pond 2 and the first Aerobic Pond 3-1 dividing plate is fixed by zigzag neck 21, and zigzag neck 21 In metal guide rail 22, position of the zigzag neck 21 in metal guide rail 22 can be freely adjusted as needed, realize One Aerobic Pond 3-1 volume-tunables；

The dividing plate for separating the first Aerobic Pond 3-1 and the second Aerobic Pond 3-2 is provided with the 3rd mistake water ravine 7, sewage disposal process In sewage cross water ravine 7 by the 3rd and flow into the second Aerobic Pond 3-2 from the first Aerobic Pond 3-1；

Sedimentation basin 4 and the second Aerobic Pond 3-2 is separated by dividing plate, separates the Aerobic Pond 3-2 of sedimentation basin 4 and second dividing plate Middle and upper part is provided with 3 water distributors 25, and 3 water distributors 25 are uniformly distributed on same plane, the dirt in sewage disposal process Water is intake vertically downward by water distributor 25 from the second Aerobic Pond 3-2 to sedimentation basin 4；

The bottom of anaerobic pond 1 is provided with the first mechanical stirring device 8；The bottom of anoxic pond 2 is provided with the first aeration head 27 And second mechanical stirring device 9；Anoxic pond 2 is additionally provided with evacuation port 26；Anoxic pond 2 also passes through the first reflux line 10 and One reflux pump 11 is connected with anaerobic pond 1；

First Aerobic Pond 3-1 and the second Aerobic Pond 3-2 bottom are provided with the second aeration head 12 uniformly arranged, and often arrange Aeration head passes through independent Air Valve Control aeration quantity；The distribution of the second aeration head 12 is than the first aeration head of anoxic pond 27 in Aerobic Pond It is densely distributed；Second Aerobic Pond 3-2 is also connected by the second reflux line 13 and the second reflux pump 14 with anoxic pond 2；

Sedimentation basin 4 is rectangular sedimentation tank；The bottom of sedimentation basin 4 is provided with 3 sludge hoppers；Sludge hopper is chamfered edge mesa-shaped, on The perimeter length ratio of bottom and bottom is 2:1；Sludge hopper respectively inserts a spoil disposal parallel to water (flow) direction inside each sludge hopper Pipe；The partial isometry of discharge pipeline insertion sludge hopper, which leaves, is uniformly provided with aperture；Discharge pipeline 15 is perpendicular to water (flow) direction；3 spoil disposals The bottom of sedimentation basin 4 is stretched out in pipe one end, and external part is connected after merging into one outlet by threeway, a passage of threeway with Blowoff chamber 16 is connected, and another article of passage of threeway is connected by the 3rd return duct 17 and the 3rd reflux pump 18 with anaerobic pond 1；

The water inlet 19 of equipment is arranged on the front end of anaerobic pond 1, and the delivery port 20 of equipment is arranged on the rear end of sedimentation basin 4, leaned on Nearly equipment water outlet is provided with effluent weir 23, and effluent weir 23 is shaped as zigzag, be provided with before effluent weir 23 baffle plate 24 with Retain water surface scum silica frost.

Embodiment 1

The processing of domestic sewage in rural areas is carried out using a kind of above-mentioned domestic sewage in rural areas integrated treatment, equipment is overall practical Steel plate quality, device internal partition use 4 mm steel plates, and external station plate uses 6 mm steel plates, and bottom plate uses 8 mm steel plates, device Weld seam uses welding by both sides, removes burr, ne-leakage.

Equipment design treatment water 1.2-2.5 m3/h, whole processing pond volume are 37.5 m3, overall length 6 m, a width of 2.5 m。

Handling process comprises the following steps：

（1）Domestic sewage in rural areas enters anaerobic pond 1 by water inlet 19, completes to release phosphorus by releasing phosphorus bacterium in anaerobic pond 1； The flow velocity that sewage enters anaerobic pond is the m3/h of 1.2 m3/h ~ 2；

（2）Anaerobic pond 1, which releases the sewage after phosphorus and crosses water ravine 5 by first, enters anoxic pond 2, and the denitrification in anoxic pond 2 is thin Bacterium carries out denitrification as carbon source using the COD in sewage to nitrate, realizes denitrogenation；

（3）Sewage after the denitrogenation of anoxic pond 2 is returned by reflux ratio 150% by the first reflux line 11 and the first reflux pump 12 Anaerobic pond is flow to, remaining sewage crosses water ravine 6 by second and enters Aerobic Pond, and under the nitrification of nitrobacteria, ammonia nitrogen turns The nitrogen of nitrate state is turned to, and completes aerobic phosphorus absorption；

（4）Sewage after Aerobic Pond nitrification passes through the second reflux line 14 and the second reflux pump 15 by reflux ratio 200% Anoxic pond is back to from the second Aerobic Pond 3-2, remaining sewage is flowed into sedimentation basin 4 by water distributor, and sewage is in sedimentation basin 4 Advection simultaneously completes sludge settling；

（5）After the sludge precipitated in sedimentation basin 4 is collected by sludge hopper, sludge passes through the 3rd by reflux ratio 70%-80% The reflux pump 18 of return duct 17 and the 3rd is back to anaerobic pond 1, and remaining sludge is discharged into blowoff chamber；Processing water after mud-water separation leads to Cross the overflow of effluent weir 24 and discharged from delivery port 20.

The average influent ammonium concentration of domestic sewage in rural areas is 26.19 mg/L, and total nitrogen concentration of averagely intaking is 31.24 Mg/L, total phosphorus concentration of averagely intaking is 3.83 mg/L, and average inlet COD concentration is 216.90 mg/L；Sewage is in whole one The hydraulic detention time for changing equipment is the h of 8 h ~ 10.

Device is investigated under different operating modes respectively for ammonia nitrogen, total nitrogen, total phosphorus, COD removal effect, each operating mode probation It is as follows for 10d, experiment of single factor result：

（1）When treating capacity is 48t/d, service condition is：Anoxic pond return current ratio of the mixed liquid R=150%, Aerobic Pond mixed liquor Reflux ratio R₁=200%, return sludge ratio R₂=80%, the flow velocity that sewage enters anaerobic pond is 2 m3/h, and sewage is in whole integration The hydraulic detention time of equipment is 8 h；After stable, the average removal rate of ammonia nitrogen is 94.21%, the average removal rate of total nitrogen For 57.79%, the average removal rate that the average removal rate of total phosphorus is 85.69%, COD is 90.88%.

（2）When treating capacity is 36t/d, service condition is：Anoxic pond return current ratio of the mixed liquid R=150%, Aerobic Pond mixed liquor Reflux ratio R₁=200%, return sludge ratio R₂=80%, the flow velocity that sewage enters anaerobic pond is 1.5 m3/h, and sewage is in whole one The hydraulic detention time for changing equipment is 9 h；After stable, the average removal rate of ammonia nitrogen is 97.01%, the average removal of total nitrogen Rate is 76.63%, and the average removal rate that the average removal rate of total phosphorus is 90.87%, COD is 94.30%.

（3）When treating capacity is 28t/d, service condition is：Anoxic pond return current ratio of the mixed liquid R=150%, Aerobic Pond mixed liquor Reflux ratio R₁=200%, return sludge ratio R₂=80%, the flow velocity that sewage enters anaerobic pond is 1.2 m3/h, and sewage is in whole one The hydraulic detention time for changing equipment is 10 h；After stable, the average removal rate of ammonia nitrogen is 95.60%, and total nitrogen is averaged Except rate is 67.21%, the average removal rate that the average removal rate of total phosphorus is 88.27%, COD is 92.59%.

Implementation result

The result of domestic sewage in rural areas integrated equipment for wastewater treatment is investigated according to above experiment of single factor, when treating capacity is 36t/d, anoxic pond return current ratio of the mixed liquid R=150%, Aerobic Pond return current ratio of the mixed liquid R₁=200%, return sludge ratio R₂=80%, The flow velocity that sewage enters anaerobic pond is 1.5 m3/h, and sewage is 9h in the hydraulic detention time of whole integration apparatus, investigates agriculture The treatment effect of village's sanitary sewage integrated equipment for wastewater treatment processing sewage, the investigation time is 30d.

1st, the removal effect of ammonia nitrogen and total nitrogen

The removal effect of ammonia nitrogen such as Fig. 2, as shown in Figure 2, into device sewage total nitrogen based on ammonia nitrogen, wherein intaking Highest ammonia nitrogen concentration is 35.82 mg/L, and minimum ammonia nitrogen concentration of intaking is 16.98 mg/L, and average influent ammonium concentration is 25.41 mg/L；After the nitrification of nitrobacteria in Aerobic Pond activated sludge, its water outlet ammonia nitrogen maximum concentration is 3.01 mg/L, Minimum ammonia nitrogen concentration is 0.18 mg/L, and average water outlet ammonia nitrogen concentration is 1.14 mg/L, and average ammonia nitrogen removal frank is 95.74%, It is much better than《Urban wastewater treatment firm pollutant emission standard》One-level A standards.

The removal effect of total nitrogen is as shown in figure 3, from the figure 3, it may be seen that water inlet highest total nitrogen concentration is 45.87 mg/L, and water inlet is most Low total nitrogen concentration is 18.18 mg/L, and total nitrogen concentration of averagely intaking is 30.17 mg/L, by the denitrification denitrogenation mistake of microorganism Cheng Hou, its water outlet total nitrogen maximum concentration are 12.53 mg/L, and minimum total nitrogen concentration is 6.39 mg/L, average water outlet total nitrogen concentration For 9.42 mg/L, average nitrogen removal rate is 66.54%, is better than《Urban wastewater treatment firm pollutant emission standard》One-level A is marked It is accurate.

It can be seen that the utility model has a nitration denitrification effect of efficient stable, nitrogen removal performance is excellent.

2nd, COD removal effect

COD removal effect is as shown in figure 4, as shown in Figure 4, COD concentration is relatively low into the sewage of device, wherein intaking Highest COD concentration is 345 mg/L, and water inlet lowest COD concentration is 109 mg/L, and average inlet COD concentration is 208.9 mg/L； And water outlet COD maximum concentrations are 27.7 mg/L, lowest COD concentration is 9.9 mg/L, and average effluent COD concentration is 16.45 mg/ L, average removal rate 91.79%, is much better than《Urban wastewater treatment firm pollutant emission standard》One-level A standards.

COD is the carbon source that microorganism grows in sewage treatment process, when carrying out the denitrification dephosphorization function of sewage, denitrification Denitrifier belongs to heterotroph facultative anaerobic bacteria, and in anoxia condition, denitrification is carried out by electron donor and nutrient source of organic carbon Reaction；And realize the second that the polyP bacteria of dephosphorization function needs active absorption to be turned into by anaerobic fermentation and acid production bacterium conversion Organic substance in water Sour glycosides, this can also consume carbon source.

Technique based on the utility model domestic sewage in rural areas integrated equipment for wastewater treatment has extraordinary removal for COD Effect, carbon source therein are efficiently utilized.

3rd, the removal effect of total phosphorus

The removal effect of total phosphorus as shown in figure 5, as shown in Figure 5, total phosphorus concentration fluctuation is larger into the sewage of device, its Middle water inlet highest total phosphorus concentration is 5.18 mg/L, and minimum total phosphorus concentration of intaking is 2.61 mg/L, and total phosphorus concentration of averagely intaking is 3.91 mg/L；And water outlet total phosphorus maximum concentration is 0.47 mg/L, minimum total phosphorus concentration is 0.27 mg/L, average water outlet total phosphorus Concentration is 0.37 mg/L, average removal rate 89.88%, is reached《Urban wastewater treatment firm pollutant emission standard》One-level A is marked It is accurate.

Technique based on the utility model domestic sewage in rural areas integrated equipment for wastewater treatment has extraordinary go for total phosphorus Except effect.

The utility model domestic sewage in rural areas integrated equipment for wastewater treatment and technique is to target contaminant COD in summary, Total nitrogen, total phosphorus have good removal effect, wherein averagely effluent COD concentration is 16.45 mg/L, average water outlet total nitrogen concentration is 9.42 mg/L, average water outlet total phosphorus concentration is 0.37 mg/L, and every water outlet reaches and is better than《Urban wastewater treatment firm pollutant Discharge standard》One-level A standards.

Claims (6)

1. a kind of domestic sewage in rural areas integrated equipment for wastewater treatment, it is characterised in that include anaerobic pond successively by sewage flow direction（1）、 Anoxic pond（2）, Aerobic Pond and sedimentation basin（4）；The anaerobic pond（1）, anoxic pond（2）, Aerobic Pond and sedimentation basin（4）In same In housing, and each pond is separated by dividing plate；

The Aerobic Pond is divided into the first Aerobic Pond（3-1）With the second Aerobic Pond（3-2）；

The anaerobic pond（1）With anoxic pond（2）Separated by dividing plate, separate anaerobic pond（1）With anoxic pond（2）Dividing plate bottom It is provided with first and crosses water ravine（5）, the sewage in sewage disposal process passes through first and crosses water ravine（5）From anaerobic pond（1）Flow into anoxic Pond（2）；

The anoxic pond（2）With the first Aerobic Pond（3-1）Separated by dividing plate, separate anoxic pond（2）With the first Aerobic Pond（3- 1）Dividing plate in the middle part of be provided with second and cross water ravine（6）, the sewage in sewage disposal process passes through second and crosses water ravine（6）From anoxic Pond（2）Flow into the first Aerobic Pond（3-1）；Separate anoxic pond（2）With the first Aerobic Pond（3-1）Dividing plate pass through zigzag neck （21）It is fixed, and zigzag neck（21）Installed in metal guide rail（22）On, zigzag neck can be freely adjusted as needed （21）In metal guide rail（22）On position, realize the first Aerobic Pond（3-1）Volume-tunable；

Separate the first Aerobic Pond（3-1）With the second Aerobic Pond（3-2）Dividing plate be provided with the 3rd and cross water ravine（7）, sewage disposal Sewage in journey crosses water ravine by the 3rd（7）From the first Aerobic Pond（3-1）Flow into the second Aerobic Pond（3-2）；

The sedimentation basin（4）With the second Aerobic Pond（3-2）Separated by dividing plate, separate sedimentation basin（4）With the second Aerobic Pond（3- 2）Dividing plate middle and upper part be provided with some water distributors（25）, and water distributor（25）It is uniformly distributed on same plane, sewage disposal During sewage pass through water distributor（25）From the second Aerobic Pond（3-2）To sedimentation basin（4）Intake vertically downward.

A kind of 2. domestic sewage in rural areas integrated equipment for wastewater treatment according to claim 1, it is characterised in that the anaerobic pond （1）Bottom be provided with the first mechanical stirring device（8）；The anoxic pond（2）Bottom be provided with the first aeration head（27）With Second mechanical stirring device（9）；The anoxic pond（2）It is additionally provided with evacuation port（26）；The anoxic pond（2）Also pass through first time Flow tube road（10）With the first reflux pump（11）With anaerobic pond（1）Connection；

First Aerobic Pond（3-1）With the second Aerobic Pond（3-2）Bottom be provided with the second aeration head uniformly arranged （12）, often arrange aeration head and pass through independent Air Valve Control aeration quantity；Second Aerobic Pond（3-2）Also pass through the second reflux line （13）With the second reflux pump（14）With anoxic pond（2）Connection；

The sedimentation basin（4）For rectangular sedimentation tank；The sedimentation basin（4）Bottom is provided with 3 sludge hoppers；The sludge hopper is put down Row respectively inserts a discharge pipeline in water (flow) direction inside each sludge hopper（15）；The discharge pipeline（15）Perpendicular to current side To；3 discharge pipelines（15）Sedimentation basin is stretched out in one end（4）Bottom, external part connected after merging into one outlet by threeway, A passage and blowoff chamber for threeway（16）Connection, another article of passage of threeway pass through the 3rd return duct（17）With the 3rd reflux pump （18）With anaerobic pond（1）Connection；

The water inlet of equipment（19）It is arranged on anaerobic pond（1）Front end, the delivery port of equipment（20）It is arranged on sedimentation basin（4）After End, close to equipment delivery port（20）Place is provided with effluent weir（23）, effluent weir（23）Before be provided with baffle plate（24）To retain the water surface Scum silica frost.

A kind of 3. domestic sewage in rural areas integrated equipment for wastewater treatment according to claim 2, it is characterised in that the sludge hopper For chamfered edge mesa-shaped, the girth ratio of upper bottom and bottom is 2:1；The effluent weir（23）Be shaped as zigzag.

A kind of 4. domestic sewage in rural areas integrated equipment for wastewater treatment according to claim 1, it is characterised in that the Aerobic Pond In the second aeration head（12）Distribution compare anoxic pond（2）In the first aeration head it is densely distributed.

A kind of 5. domestic sewage in rural areas integrated equipment for wastewater treatment according to claim 2, it is characterised in that

The partial isometry of discharge pipeline insertion sludge hopper is from being uniformly provided with aperture.

A kind of 6. domestic sewage in rural areas integrated equipment for wastewater treatment according to claim 1, it is characterised in that the anaerobic pond （1）It is interior that Denitrifying Phosphate Accumulating Organisms are contained by anoxic-anaerobism backflow enrichment；The anoxic pond（2）It is interior containing denitrifying bacteria and anti- Nitrify polyP bacteria；Contain nitrobacteria and Denitrifying Phosphate Accumulating Organisms in the Aerobic Pond.