CN205258127U - Circulatory flow loop type multistage sludge -biofilm intergrowth combined type bioreactor - Google Patents

Circulatory flow loop type multistage sludge -biofilm intergrowth combined type bioreactor Download PDF

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CN205258127U
CN205258127U CN201520821479.5U CN201520821479U CN205258127U CN 205258127 U CN205258127 U CN 205258127U CN 201520821479 U CN201520821479 U CN 201520821479U CN 205258127 U CN205258127 U CN 205258127U
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anoxic
aerobic
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anaerobic
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桂新安
盛倩
陈清杰
李晖
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Guotou xinkaishui Environmental Investment Co.,Ltd.
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Shanghai CITIC Water Industry Co Ltd
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Abstract

The utility model relates to a circulatory flow loop type multistage sludge -biofilm intergrowth combined type bioreactor, the reactor includes the anaerobism district, the supporting district of the good oxygen of oxygen deficiency, settling zone more than the two -stage, the supporting district of the good oxygen of oxygen deficiency is including the anoxic zone of establishhing the in proper order oxygen district that becomes reconciled, be equipped with suspension filler district in the good oxygen district, the anaerobism district is provided with sewage filling opening and mud filling opening, the anoxic zone is provided with the sewage filling opening, the settling zone is provided with sewage egress opening and mud discharge port, the mud discharge port passes through the return sludge pipe connection the mud filling opening in anaerobism district. Circulatory flow loop type multistage sludge -biofilm intergrowth combined type bioreactor passes through the optimum organization of reactor, can realize effectively that high -efficient nitrogen and phosphorus removal, control pond hold, reduce area, reduce engineering cost and reduce the working costs.

Description

A kind of circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor
Technical field
The utility model relates to a kind of circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor, belongs to sewage treatment area.
Background technology
" the water prevention and cure of pollution action plan " of up-to-date issue in April, 2015 clearly proposes, and existing town sewage treatment facility will suit measures to local conditions to transform, and reaches corresponding discharge standard or regeneration requirement before at the bottom of the year two thousand twenty. Sensitizing range (emphasis lake, emphasis reservoir, immediate offshore area watershed) town sewage treatment facility should reach one-level A discharge standard before the end of the year 2017 comprehensively, built-up areas water quality does not reach the city of surface water IV class standard, and newly-built town sewage treatment facility will be carried out one-level A discharge standard; To the year two thousand thirty, strive that National Water Environmental quality totally improves, aquatic ecosystem function is tentatively recovered. To the middle of this century, eco-environmental quality is improved comprehensively, and the ecosystem is realized benign cycle. Hence one can see that, and coming few decades energy-saving reduction of discharging requires can be more and more higher.
On the one hand, be still according to the present situation of pollutant emission standard one-level B standard design and operation for current numerous sewage treatment plants, along with deeply carrying out of national energy-saving emission reduction work, the upgrading of sewage treatment plant is imperative with optimization operation. in sewage disposal upgrading, expand pond perhaps increase advanced treatment unit be the most conventional be also the most reliable scheme, but a lot of sewage treatment plants do not have the newly-built sewage treatment unit in sufficient factory site, and the strict Arable-land Protection Policies of China does not allow again the random enlarged-area of sewage treatment plant, therefore little in the urgent need to seeking a floor space, the upgrading scheme that disposal ability is high, the current BAF that mainly contains, contact oxidation method, membrane bioreactor, but these techniques also exist investment high, the problems such as energy consumption and operating cost height, therefore, it is very necessary that mark upgrading technology is put forward in the sewage disposal of research and development efficient low-consume low cost.
On the other hand, the fast development in city makes to be originally progressively incorporated to urban district away from the sewage treatment plant in urban district, in transformation or newly-built process, can utilize land limited, therefore seeks a kind of reduced investment, can effectively to control the technology that pond holds day by day urgent.
What this technology was intended to key breakthrough transformation or newly-built sewage treatment plant carries mark renovation technique, completes the discharge of waste water stably reaching standard.
Multistage AO: biological reaction pool is designed to front end anaerobic zone/aerobic+multi-stage anaerobic/aerobic zone by multistage AO technique, adopt multiple spot water distribution technology, divide multistage to allocate respectively the front end of He Ge anoxic zone, anaerobic zone in sewage, and returned sludge is all back to anaerobic zone front end, create the environment that is more suitable for polyP bacteria, nitrifier and denitrifying bacterium growth and breeding, greatly strengthened dephosphorization denitrogenation ability.
IFAS:IFAS technique is a kind of technique (principle is as shown below) that the biomembrance process of apposition growth is combined with the activated sludge process of suspension growth, specifically be and in activated sludge process, drop into floating stuffing, activated sludge by the biomembrane on floating stuffing and suspension is removed the pollutant in water jointly, and due to the dissection of floating stuffing to bubble, can improve water oxygen transfer efficiency, strengthen treatment effect.
In addition, IFAS technique is by modes such as aeration disturbance, liquid backflows, filler is suspended in reactor, do not increase the mixed liquid concentration of activated sludge owing to being fixed on biomass on filler, and biomembranous growth can reduce system SVI, therefore the performance of downstream sedimentation basin not only can not be subject to the negative effect that in activated sludge reactor, solid loading increases, and its performance can be able to raising to a certain degree.
The utility model is fully in conjunction with multistage AO and two kinds of reactor advantages of IFAS advantages such as () IFAS floor space are little, improve active sludge intermixture concentration, mud decrement and can improve sludge settling property, do not increase second pond load, buffer capacity is strong and multistage AO sludge concentration is high, utilization of carbon source is abundant, nitric efficiency is high, capacity of resisting impact load is strong, operating cost is few, construction investment is low, the sewage of sewage treatment plant is carried out to biochemical treatment, to reach preferably effluent quality.
Utility model content
The purpose of this utility model is to overcome the shortcoming of prior art, a kind of circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor is provided, by the optimum organization of reactor, can effectively realize high-efficient denitrification and dephosphorization, control pond appearance, reduce floor space, reduce construction costs and reduce operating cost.
The utility model is achieved through the following technical solutions:
A kind of circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor, comprise the anaerobic zone of setting up successively, the supporting district of the above Anoxic/Aerobic of two-stage, settling zone, the supporting district of described Anoxic/Aerobic comprises anoxic zone and the aerobic zone of setting up successively, between adjacent twoth district, be provided with partition wall, one end of described partition wall is provided with water hole, in described aerobic zone, be provided with floating stuffing district, described anaerobic zone is provided with sewage inlet and mud inlet, described anoxic zone is provided with sewage inlet, described settling zone is provided with sewage outfall and mud outlet, described mud outlet connects the mud inlet of described anaerobic zone by returned sludge channel.
Preferably, described anaerobic zone is provided with water conservancy diversion partition wall, by described water conservancy diversion partition wall, anaerobic zone is divided into anaerobic zone A and anaerobic zone B; The two ends of described water conservancy diversion partition wall are provided with two pod apertures.
Preferably, described anoxic zone is provided with water conservancy diversion partition wall, by described water conservancy diversion partition wall, described anoxic zone is divided into anoxic zone A and anoxic zone B; The two ends of described water conservancy diversion partition wall are provided with two pod apertures.
Preferably, described aerobic zone is provided with water conservancy diversion partition wall, by described water conservancy diversion partition wall, aerobic zone is divided into aerobic zone A and aerobic zone B; The two ends of described water conservancy diversion partition wall are provided with two pod apertures.
Preferably, described floating stuffing district comprises floating stuffing and floating stuffing device for trapping.
Preferably, described anaerobic zone and described anoxic zone are provided with submersible agitator. Preferred, the submersible agitator of anaerobic zone is agitating type; The submersible agitator of anoxic zone is push flowing.
Preferably, described aerobic zone is provided with submersible agitator, and depending on aeration intensity, low or mixing sludge, filler fluidized state arrange when poor. More excellent, the submersible agitator of aerobic zone is push flowing.
Preferably, described anoxic zone and described aerobic zone are provided with aerating system. Preferred, the aerating system of described anoxic zone and aerobic zone is made up of plate-type aerator, diameter D260 (200~300), and single maximal ventilatory volume is 4m3/ h (2.3~5.9); Described aerator comprises support, material ABS, subsidiary bilateral buckle.
Circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor of the present utility model, has following beneficial effect:
(1) method of operation is flexible, and denitrogenation dephosphorizing efficiency is high. Multipoint water feeding mode can make the multistage distribution of pollutant, and each reaction zone can form obvious sludge concentration gradient according to pollutant characteristic, and the method for operation is flexible; Create the environment of each quasi-microorganism suitable growth in suitable activated sludge by the segmentation of reaction zone, realize high-efficient denitrification and dephosphorization; The next stage anoxic zone of next-door neighbour aerobic zone arranges air system, can be reduced into conventional A according to water quality2O process operation;
(2) hydraulic flow state is " subregion circulation mixing, overall plug-flow ", and hybrid reaction is satisfactory for result. Each district reactor adopts the fluidised form of circular flow, possesses the anti impulsion load ability of complete mixing reactor and the substrate degradation motive force of plug flow reactor simultaneously; Each district reactor adopts circular flow mode, and water inlet current are evenly distributed, and is difficult for producing torrent, eddy current, short stream, stagnant water and deposition phenomenon in reactor, and the loss of flood peak is less, and the degree of mixing well of micromixing is high, hybrid reaction is satisfactory for result;
(3) strong shock resistance. First, can carry out reasonable distribution to pollution sources by multipoint water feeding mode, ensure the sludge loading that each reaction zone is comparatively suitable; Secondly, aging the coming off while entering mixed liquor of biomembrane on floating stuffing, can play inoculation effect to activated sludge, and the capacity of resisting impact load of reaction tank is improved; Finally, various hybrid modes are organically combined, also can raising system process the applicable ability to different sewage water quality;
(4) sludge settling property strengthens, and excess sludge production reduces. Floating stuffing can effectively improve reaction tank sludge concentration, and the microbial biomass of raising, owing to being fixed on filling carrier, not only can not increasing the mixed liquid concentration of activated sludge and the solid loading of downstream sedimentation basin, and can reduce SVI, improves sludge settling property; Because floating stuffing sludge concentration is high, mud mud increases age simultaneously, and corresponding excess sludge production can reduce;
(5) construction investment is low. The biomass of floating stuffing layer makes pollutant biochemical treatment be able to complete in less space, and the pond that significantly reduces reaction tank holds (approximately 45%), construction investment low (approximately 15%);
(6) operation energy consumption is low. First, utilize multipoint water feeding, the aerobic nitration denitrification that carries out of multi-stage anaerobic, the distribution of optimization carbon source and strengthened denitrification are cancelled the nitrification liquid backflow facility of conventional art simultaneously, and operation energy consumption is minimized; Secondly, adopt micro-pore aeration equipment, power consumption is far below conventional perforation or mesopore aerating system, and in conjunction with circular flow waterpower form, can solve the contradiction between oxygenation and stirring, be conducive to reaction tank end dissolved oxygen to be recycled, capacity usage ratio is high; The 3rd, in conjunction with plug-flow, the bioflocculation in reactor adopts lower motive force, can save energy consumption;
(7) pipe-line system is few, and Maintenance and Repair amount is little. By inner channel laminated construction design, save water inlet, returned sludge pipeline system, Maintenance and Repair amount is little.
Brief description of the drawings
Fig. 1 is a kind of circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor sewage treatment process figure;
Fig. 2 is the circulation flow ring-shaped multistage mud of a kind of square film symbiosis composite type bioreactor plan structure schematic diagram.
Brief description of the drawings:
1-anaerobic zone; 1a-anaerobic zone A; 1b-anaerobic zone B;
2-first order anoxic zone; 2a-first order anoxic zone A; 2b-first order anoxic zone B;
3-first order aerobic zone; 3a-first order aerobic zone A; 3b-first order aerobic zone B; (containing floating stuffing district);
Anoxic zone, the 4-second level; 4a-second level anoxic zone A; 4b-second level anoxic zone B;
Aerobic zone, the 5-second level; 5a-second level aerobic zone A; 5b-second level aerobic zone B; (containing floating stuffing district);
6-settling zone; 6a-settling zone sewage outfall; 6b-settling zone mud outlet;
7-sewage inlet; 7a-anaerobic zone sewage inlet; 7b-first order anoxic zone sewage inlet; Anoxic zone, 7c-second level sewage inlet;
8-returned sludge channel; The mud inlet of 8a-anaerobic zone;
Water conservancy diversion partition wall between 9-anaerobic zone A and anaerobic zone B; Partition wall between 10-anaerobic zone and first order anoxic zone; Water conservancy diversion partition wall between 11-first order anoxic zone A and first order anoxic zone B; Partition wall between 12-first order anoxic zone and first order aerobic zone; Water conservancy diversion partition wall between 13-first order aerobic zone A and first order aerobic zone B; Partition wall between 14-first order aerobic zone and anoxic zone, the second level; Water conservancy diversion partition wall between 15-second level anoxic zone A and anoxic zone, second level B; Partition wall between anoxic zone, the 16-second level and aerobic zone, the second level; Water conservancy diversion partition wall between 17-second level aerobic zone A and aerobic zone, second level B; Partition wall between aerobic zone, the 18-second level and settling zone;
The pod apertures of 19&20-anaerobic zone; 21-anaerobic zone is to the water hole of first order anoxic zone; The pod apertures of 22&23-first order anoxic zone; The water hole of 24-first order anoxic zone to first order aerobic zone; The pod apertures of 25&26-first order aerobic zone; The water hole of 27-first order aerobic zone to anoxic zone, the second level; The pod apertures of anoxic zone, the 28&29-second level; The water hole of anoxic zone, the 30-second level to aerobic zone, the second level; The pod apertures of aerobic zone, the 31&32-second level; The pod apertures of aerobic zone, the 33-second level to settling zone;
34-floating stuffing; 35-floating stuffing device for trapping; 36-diving mixer (underwater scooter).
Detailed description of the invention
The sewage treatment process figure of circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor of the present utility model as shown in Figure 1, in conjunction with multistage AO and two kinds of process advantages of IFAS, the sewage of sewage treatment plant is carried out to biochemical treatment, to reach preferably effluent quality.
Utilize the circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor sewage treatment process shown in Fig. 2, comprise the following steps:
(A) sewage enters described reactor by two parts, and Part I enters anaerobic zone by the sewage inlet of anaerobic zone, and Part II enters respectively anoxic zones at different levels by the sewage inlet of anoxic zones at different levels;
(B) mix from the sewage of the sewage inlet of anaerobic zone with from the returned sludge of settling zone,, polyP bacteria is released phosphorus under anaerobic environment the anaerobic zone in, transforms the organic pollution of easily degrading simultaneously, and part itrogenous organic substance is carried out to ammonification;
(C) then enter the supporting district of the above Anoxic/Aerobic of two-stage, in anoxic zones at different levels, carry out denitrification denitrogenation, the partial organic substances removal of degrading under the effect of denitrifying bacterium; In aerobic zones at different levels, be provided with floating stuffing district, carry out the absorption of the nitrated and phosphorus of the ammonification of organic further degraded and organic nitrogen;
(D) water outlet of afterbody aerobic zone drains into settling zone, and by the mud-water separation discharge of purifying waste water, a thickened sludge part is back to anaerobic zone, and another part drains into sludge concentration and dewatering system.
Described anaerobic zone comprises anaerobic zone A and anaerobic zone B; First sewage enter anaerobic zone A, and the stirring impetus current downflow of the submersible agitator arranging in the A of anaerobic zone, then enters in the B of anaerobic zone, the stirring impetus current downflow of the submersible agitator arranging in the B of anaerobic zone; Then a part is circulated in the A of anaerobic zone, and a part enters first order anoxic zone.
Anoxic zones at different levels comprise anoxic zone A and anoxic zone B; The stirring impetus current downflow of the submersible agitator that sewage arranges in the A of anoxic zone, then enter anoxic zone B, the stirring impetus current downflow of the submersible agitator arranging in the B of anoxic zone, then a part is circulated in the A of anoxic zone, and a part enters aerobic zone.
Aerobic zones at different levels comprise aerobic zone A and aerobic zone B; Aerobic zone A and aerobic zone B are provided with floating stuffing district; First sewage enter aerobic zone A, then enters aerobic zone B, and a part is circulated in the A of aerobic zone, and a part enters anoxic zone or settling zone.
Below by specific instantiation explanation the technical solution of the utility model. Should be understood that one or more method steps that the utility model is mentioned do not repel between the step that also has additive method step or clearly mention at these before and after described combination step can also insert additive method step; Should also be understood that these embodiment are only not used in restriction scope of the present utility model for the utility model is described. And, except as otherwise noted, the numbering of various method steps is only for differentiating the convenient tool of various method steps, but not for limiting the ordering of various method steps or limiting the enforceable scope of the utility model, the change of its relativeness or adjustment, in the situation that changing technology contents without essence, when being also considered as the enforceable category of the utility model.
Below in conjunction with accompanying drawing and concrete case study on implementation, the utility model is further described.
Embodiment 1
As shown in Figure 2, a kind of circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor (CCMAO-IFAS) (square), comprise anaerobic zone 1, first order anoxic zone 2, first order aerobic zone 3, anoxic zone, the second level 4, aerobic zone, the second level 5 and settling zone 6, anaerobic zone is provided with sewage inlet 7a and mud inlet 8a, first order anoxic zone 2 is provided with first order anoxic zone sewage inlet 7b, anoxic zone, the second level 4 is provided with anoxic zone, second level sewage inlet 7c, settling zone 6 is provided with settling zone sewage outfall 6a and settling zone mud outlet 6b, settling zone mud outlet 6b connects the mud inlet 8a of anaerobic zone by returned sludge channel 8, reactor is square, influent weir and regulating gate are set respectively on 7 inlet channels sewage is dispensed to anaerobic zone 1, first order anoxic zone 2 and anoxic zone, the second level 4, anaerobic zone 1 comprises anaerobic zone A1a and anaerobic zone B1b, and anaerobic zone A1a and anaerobic zone B1b separate by water conservancy diversion partition wall 9, and the two ends of water conservancy diversion partition wall 9 are provided with pod apertures 19&20, and current are communicated with by pod apertures 19&20, and inside arranges submersible agitator 36 and stirs promotion, separate by partition wall 10 anaerobic zone 1 and first order anoxic zone 2, and one end of partition wall 10 is provided with water hole 21, and anaerobic zone 1 sewage is communicated with first order anoxic zone 2 by water hole 21, first order anoxic zone 2 comprises first order anoxic zone A2a and first order anoxic zone B2b, first order anoxic zone A2a and first order anoxic zone B2b separate by water conservancy diversion partition wall 11, the two ends of water conservancy diversion partition wall 11 are provided with pod apertures 22&23, current are communicated with by pod apertures 22&23, and inside arranges submersible agitator 36 and stirs promotion and micro-pore aeration equipment, separate by partition wall 12 first order anoxic zone 2 and first order aerobic zone 3, and one end of partition wall 12 is provided with water hole 24, and first order anoxic zone 2 is communicated with first order aerobic zone 3 by water hole 24, first order aerobic zone 3 comprises first order aerobic zone A3a and first order aerobic zone B3b, first order aerobic zone A3a and first order aerobic zone B3b separate by water conservancy diversion partition wall 13, the two ends of water conservancy diversion partition wall 13 are provided with pod apertures 25&26, current are communicated with by pod apertures 25&26, circulate around water conservancy diversion partition wall 13 simultaneously, in first order aerobic zone 3, be provided with floating stuffing district and micro-pore aeration equipment, floating stuffing district comprises floating stuffing 34 and floating stuffing device for trapping 35, and floating stuffing 34 is fixed on appointed area by floating stuffing device for trapping 35, separate by partition wall 14 first order aerobic zone 3 and anoxic zone, the second level 4, and one end of partition wall 14 is provided with water hole 27, and first order aerobic zone 3 sewage are communicated with anoxic zone, the second level 4 by water hole 27, anoxic zone, the second level 4 comprises anoxic zone, second level A4a and anoxic zone, second level B4b, anoxic zone, second level A4a and anoxic zone, second level B4b separate by water conservancy diversion partition wall 15, the two ends of water conservancy diversion partition wall 15 are provided with pod apertures 28&29, current are communicated with by pod apertures 28&29, and inside arranges submersible agitator 36 and stirs promotion and micro-pore aeration equipment, separate by partition wall 16 anoxic zone, the second level 4 and aerobic zone, the second level 5, and one end of partition wall 16 is provided with water hole 30, and anoxic zone, the second level 4 sewage are communicated with aerobic zone, the second level 5 by water hole 30, aerobic zone, the second level 5 comprises aerobic zone, second level A5a and aerobic zone, second level B5b, aerobic zone, second level A5a and aerobic zone, second level B5b separate by water conservancy diversion partition wall 17, the two ends of water conservancy diversion partition wall 17 are provided with pod apertures 31&32, current are communicated with by pod apertures 31&32, circulate around water conservancy diversion partition wall 17 simultaneously, in aerobic zone, the second level 5, be provided with floating stuffing district and micro-pore aeration equipment, floating stuffing district comprises floating stuffing 34 and floating stuffing device for trapping 35, and floating stuffing 34 is fixed on appointed area by floating stuffing device for trapping 35, aerobic zone, the second level 5 and settling zone 6 are separated by partition wall 18, and one end of partition wall 18 is provided with water hole 33, and aerobic zone, the second level 5 sewage are communicated with settling zone 6 by water hole 33, settling zone 6 thickened sludges are back to anaerobic zone 1,8 returned sludge channel by returned sludge channel 8 regulating gate are set.
Adopt circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor (CCMAO-IFAS) (square) the processing 40000m as Fig. 13/ d town sewage, treatment process comprises the following steps:
(1) sewage enters reactor by two parts, Part I enters anaerobic zone 1 by the sewage inlet 7a of anaerobic zone, and Part II enters respectively first order anoxic zone 2 and anoxic zone, the second level 4 by first order anoxic zone sewage inlet 7b and anoxic zone, second level sewage inlet 7c in proportion; Entering first order anoxic zone is 2:3 with the discharge ratio that enters anoxic zone, the second level.
(2) mix from the sewage of anaerobic zone sewage inlet 7a with from the returned sludge of settling zone, first enter anaerobic zone A1a, the stirring impetus current downflow of the submersible agitator arranging in the A1a of anaerobic zone, then enter in the B of anaerobic zone the stirring impetus current downflow of the submersible agitator arranging in the B of anaerobic zone; Then a part is circulated in the A of anaerobic zone, and a part enters polyP bacteria in anaerobic zone, first order anoxic zone and release phosphorus under anaerobic environment, transforms the easily organic pollution of degraded simultaneously, and part itrogenous organic substance is carried out to ammonification;
(3) then enter the supporting district of two-stage Anoxic/Aerobic, every grade of supporting district of Anoxic/Aerobic comprises anoxic zone and aerobic zone, and anoxic zones at different levels comprise anoxic zone A and anoxic zone B; The stirring impetus current downflow of the submersible agitator that sewage arranges in the A of anoxic zone, then enter anoxic zone B, the stirring impetus current downflow of the submersible agitator arranging in the B of anoxic zone, then a part is circulated in the A of anoxic zone, and a part enters aerobic zone. Aerobic zones at different levels comprise aerobic zone A and aerobic zone B; Aerobic zone A and/or aerobic zone B are provided with floating stuffing district; First sewage enter aerobic zone A, then enters aerobic zone B, and a part is circulated in the A of aerobic zone, and a part enters anoxic zone or settling zone, carries out denitrification denitrogenation in anoxic zones at different levels, the partial organic substances removal of degrading under the effect of denitrifying bacterium; In aerobic zones at different levels, be provided with floating stuffing district, carry out the absorption of the nitrated and phosphorus of the ammonification of organic further degraded and organic nitrogen;
(4) water outlet of afterbody aerobic zone drains into settling zone, and by the mud-water separation discharge of purifying waste water, a thickened sludge part is back to anaerobic zone, and another part drains into sludge concentration and dewatering system.
34 floating stuffing packing ratios are 35%; 14 floating stuffing materials are polyethylene, particle diameter 25mm, bulk specific weight 0.96 ± 2g/cm3, specific area > 500m2/m3; 35 floating stuffing device for trapping are held back net by stainless steel porous and are formed, and hold back net Circularhole diameter 8mm, and center of circular hole, apart from being 10mm, is held back the each thick bubble diffuser of a row of installing of net both sides base portion. Anaerobic zone submersible agitator is agitating type; Anoxic zone and aerobic zone submersible agitator are push flowing. Anoxic zone and aerobic zone aerating system are made up of plate-type aerator, diameter D250, and single maximal ventilatory volume is 4m3/ h; Aerator comprises support, material ABS, subsidiary bilateral buckle.
Reaction zone return sludge ratio 100% (actual motion 50~100%); The average sludge concentration 8360mg/L of reaction zone (actual 7000~12000mg/L); Anaerobic zone stirring intensity 5W/m3, configure 4 mixers, separate unit power 2.2kW; Anoxic zone stirring intensity 2.5W/m3, configure 8 mixers, separate unit power 1.1kW; Aerobic zone aeration intensity 8~10m3/m2.h, arrange 2500 of microporous aeration discs, reserved 10~20% aerobic zone aerators in anoxic zone 2 (are reduced into conventional A2This district of O state of the art is by aerobic operation).
Anaerobic zone hydraulic detention time is 1h; Anoxic zone hydraulic detention time is 2.3h; Aerobic zone hydraulic detention time is 3.8h. The denitrification load span of anoxic zone is 0.03kgNO3-N/kgMLSS.d (actual motion 0.03~0.05kgNO3-N/kgMLSS.d); Sludge loading value is 0.108kgBOD5/ (kgMLSS.d) (actual motion 0.05~0.15kgBOD5/(kgMLSS.d))。
Structure of reactor size (except settling zone): L × B × H=50 × 40 × 7m (available depth 6m) (totally 1, point two groups of operations).
Implementation result:
Design influent quality:
CODCr:330mg/L;BOD5:150mg/L;TN:40mg/L;NH3-N:35mg/L;SS:300mg/L;TP:5mg/L;
After the circulation flow ring-shaped multistage mud of the utility model film symbiosis composite type bioreactor is processed, main effluent quality all can reach that (GB18918-2002) one-level A is below the mark to " urban wastewater treatment firm pollutant emission standard ".
Operation energy consumption: 0.19~0.21kW.h/m3
Should point out, all those skilled in the art, in the situation that not departing from spirit and scope of the present utility model, a little change of making when utilizing disclosed above technology contents, the equivalent variations of modifying and developing, be equivalent embodiment of the present utility model; Meanwhile, the change of any equivalent variations that all foundations essence technology of the present utility model is done above-described embodiment, modification and differentiation, all still belong in the scope of the technical solution of the utility model.

Claims (8)

1. a circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor, it is characterized in that, comprise the anaerobic zone of setting up successively, the supporting district of the above Anoxic/Aerobic of two-stage, settling zone, the supporting district of described Anoxic/Aerobic comprises anoxic zone and the aerobic zone of setting up successively, between adjacent twoth district, be provided with partition wall, one end of described partition wall is provided with water hole, in described aerobic zone, be provided with floating stuffing district, described anaerobic zone is provided with sewage inlet and mud inlet, described anoxic zone is provided with sewage inlet, described settling zone is provided with sewage outfall and mud outlet, described mud outlet connects the mud inlet of described anaerobic zone by returned sludge channel.
2. circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor as claimed in claim 1, is characterized in that, described anaerobic zone is provided with water conservancy diversion partition wall, by described water conservancy diversion partition wall, anaerobic zone is divided into anaerobic zone A and anaerobic zone B; The two ends of described water conservancy diversion partition wall are provided with two pod apertures.
3. circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor as claimed in claim 1, is characterized in that, described anoxic zone is provided with water conservancy diversion partition wall, by described water conservancy diversion partition wall, described anoxic zone is divided into anoxic zone A and anoxic zone B; The two ends of described water conservancy diversion partition wall are provided with two pod apertures.
4. circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor as claimed in claim 1, is characterized in that, described aerobic zone is provided with water conservancy diversion partition wall, by described water conservancy diversion partition wall, aerobic zone is divided into aerobic zone A and aerobic zone B; The two ends of described water conservancy diversion partition wall are provided with two pod apertures.
5. circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor as claimed in claim 1, is characterized in that, described floating stuffing district comprises floating stuffing and floating stuffing device for trapping.
6. circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor as claimed in claim 1, is characterized in that, described anaerobic zone and described anoxic zone are provided with submersible agitator.
7. circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor as claimed in claim 6, is characterized in that, the submersible agitator of anaerobic zone is agitating type; The submersible agitator of anoxic zone is push flowing.
8. circulation flow ring-shaped multistage mud film symbiosis composite type bioreactor as claimed in claim 1, is characterized in that, described anoxic zone and described aerobic zone are provided with aerating system.
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CN105254008A (en) * 2015-10-22 2016-01-20 上海中信水务产业有限公司 Circulation flow ring-shaped multi-section soil film symbiotic combined type bio-reactor and sewage treatment process thereof

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CN108128890B (en) * 2017-12-29 2021-01-05 陕西科技大学 Three-ditch water flow counter-flow Orbal oxidation ditch flow state adjusting structure and method

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* Cited by examiner, † Cited by third party
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CN105254008A (en) * 2015-10-22 2016-01-20 上海中信水务产业有限公司 Circulation flow ring-shaped multi-section soil film symbiotic combined type bio-reactor and sewage treatment process thereof
CN105254008B (en) * 2015-10-22 2018-04-17 上海中信水务产业有限公司 A kind of circulation flow ring-shaped multistage Activated sludge-biofilm composite type bioreactor and its sewage treatment process

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