CN104925948A - Immersed circulating biofilter reactor and sewage treatment method - Google Patents
Immersed circulating biofilter reactor and sewage treatment method Download PDFInfo
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- CN104925948A CN104925948A CN201510385451.6A CN201510385451A CN104925948A CN 104925948 A CN104925948 A CN 104925948A CN 201510385451 A CN201510385451 A CN 201510385451A CN 104925948 A CN104925948 A CN 104925948A
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Abstract
The invention discloses an immersed circulating biofilter reactor and a sewage treatment method. The immersed circulating biofilter reactor is arranged in a sewage tank and comprises a tank body, a material lifting pipe, a material washer, a material distributor an aerating pipe and a backwashing gas inlet pipe, wherein the tank body is filled with a filter material, a water outlet is formed in the tank body above the sewage level in the sewage tank, and a water inlet is formed in the tank body below the sewage level; the material lifting pipe is arranged in the tank body; the material washer is arranged at the upper end of the material lifting pipe; the material distributor is arranged on the lower part of the tank body and the material lifting pipe passes through the material distributor; the aerating section of the aerating pipe is located in the lower part in the tank body; the backwashing gas inlet pipe extends into the tank body and the gas outlet of the backwashing gas inlet pipe is formed in the lower part of the material lifting pipe. According to the immersed circulating biofilter reactor and the sewage treatment method disclosed by the invention, the occupied area for sewage treatment is reduced.
Description
Technical field
The present invention relates to technical field of sewage, specifically a kind of immersion circulating biological filter tank reactor and sewage water treatment method.
Background technology
BAF is called for short BAF, is a kind of New biological membrane method sewage water treatment method grown up America and Europe the end of the eighties, and the method has the effect of removing SS, COD, BOD, nitrated, denitrogenation, dephosphorization, removal AOX (objectionable impurities).Its advantage is as follows: 1. one-time investment is lower than traditional method by 1/4; 2. area occupied is 1/10 ~ 1/5 of common process, and running cost is low by 1/5; 3. inflow requirement suspended substance 50 ~ 60mg/L, preferably combines with primary reinforcement process, as adopted hydrolysis acidification pool; 4. filtrate many employings haydite, diameter 5mm, floor height 1.5 ~ 4m; 5. water down, gas reverse flow up can not establish second pond.
BAF is compared with conventional activated sludge process, have that organic loading is high, floor space is little (being 1/3 of conventional activated sludge process), less investment (saving 30%), the advantages such as sludge bulking, oxygen transmission efficiency is high, effluent quality is good can not be produced, but it requires comparatively tight (general requirement SS≤100mg/L to water inlet SS, best SS≤60mg/L), therefore need to carry out pre-treatment to water inlet.Meanwhile, its back flushing water yield, head loss are all larger.
In addition, BAF is as integrating bio-oxidation and the novel process retaining suspended solids, save post precipitation pond (second pond), there is volumetric loading, hydraulic load is large, hydraulic detention time is short, required initial cost is few, and effluent quality is good: operation energy consumption is low, the feature that working cost is few.
But existing BAF needs to arrange separately, adds floor space.Bring certain difficulty to existing Transformation of Sewage Treatment simultaneously, be difficult to carry out reasonable reformation on existing layout basis.
Summary of the invention
In view of this, a kind of immersion circulating biological filter tank reactor and sewage water treatment method is embodiments provided.Main purpose saves floor occupying area.
For achieving the above object, the present invention mainly provides following technical scheme:
On the one hand, embodiments provide a kind of immersion circulating biological filter tank reactor, immersion circulating biological filter tank reactor, is characterized in that, described circulating biological filter tank reactor is arranged in sewage lagoon, and described circulating biological filter tank reactor comprises:
Tank body, is filled with filtrate in tank body, and tank body is provided with water outlet and water-in, and water outlet is higher than wastewater level in sewage lagoon, and water-in is positioned at filtrate district, and water-in is lower than wastewater level in sewage lagoon;
Extraction pipe, is located in tank body, and upper end is filtrate outlet, and lower end is filtrate entrance;
Diffuser, is located at the upper end of extraction pipe;
Distributor, is located at the bottom of extraction pipe, and described extraction pipe is through described distributor;
Aeration tube, the aeration section of described aeration tube is positioned at the bottom of tank body;
Backwash inlet pipe, the air outlet of described backwash inlet pipe is positioned at the below of the filtrate entrance of extraction pipe.
As preferably, the cloth conical surface of described distributor is evenly equipped with solarization air cap, and described aeration tube aeration section is positioned at distributor bottom.
As preferably, the diameter of described solarization air cap is 3mm.
As preferably, the aeration section of described aeration tube is horizontally disposed annular.
As preferably, the aeration section of described aeration tube comprises stainless steel supporting pipeline and is coated on the film of stainless steel supporting pipeline outer wall, and described film evenly gathers aerating pore.
As preferably, be provided with inner sleeve in described tank body, form annular space between described inner sleeve and tank body, described distributor is positioned at inner sleeve, the annular space portion that described water-in is formed between inner sleeve and tank body.
As preferably, be provided with water inlet pipe in described tank body, water inlet pipe is connected with water-in, water inlet pipe go out mouth down.
As preferably, described water outlet is the crest of weir being positioned at tank body upper end, and described crest of weir is Height Adjustable crest of weir.
As preferably, the material of described tank body is stainless steel.
On the other hand, embodiments provide a kind of sewage water treatment method, adopt above-mentioned arbitrary described immersion circulating biological filter tank reactor, described biological filter reactor is placed in sewage lagoon, and described sewage water treatment method comprises the steps:
Scavenging process: under aeration tube aeration oxygen supply condition, the air-flow that aeration produces makes water level in tank body obtain lifting, higher than the water level of the outer sewage lagoon of tank, the water of tank body internal upper part overflows tank body by the water outlet on tank body top, flows into sewage lagoon, and the sewage simultaneously in sewage lagoon fills in tank body by water-in, and through above filtrate to tank body, then overflow tank body, enter sewage lagoon, form inner-outer circulation; When being provided with inner sleeve, while sewage carries out inner-outer circulation, the air-flow that aeration produces will concentrate on inner sleeve interior region and rise, sewage outside in inner sleeve in tank body is driven to form internal recycle, formation anaerobic zone, annular space portion between inner sleeve and tank body, form aerobic zone in inner sleeve inside, sewage is constantly circulated to anaerobic zone by aerobic zone;
Backwash process: pass into backwash pressurized gas by backwash inlet pipe in tank body, the current that backwash pressurized gas drives carry filtrate and sweep along base sludge from the upwards extracting of extraction pipe lower end, and enter diffuser by extraction pipe upper end, now the microbial film on ceramic grain filter surface is thoroughly separated with filtrate under air water strong disturbance with the mud of sweeping along, mud after separation is under aeration state, be suspended in reactor tank body top water, tank body is overflowed from water outlet with current, enter sewage lagoon outside tank body, in sewage lagoon, sewage is in quiet heavy state, in the sludge hopper of sludge settling bottom sewage lagoon, and filtrate is evenly scattered under gravity and by distributor cloth.
Compared with prior art, beneficial effect of the present invention is:
The immersion circulating biological filter tank reactor of the embodiment of the present invention is arranged in sewage lagoon, sewage in sewage lagoon directly enters from the water-in tank body, without the need to additionally arranging sewage water equipment, and the extra land occupation in the biological filter of the embodiment of the present invention, decrease floor space, be beneficial to and existing dirt process place is transformed.And cost is low, change Recycle design, effective.
Accompanying drawing explanation
Fig. 1 is the structural representation of the immersion circulating biological filter tank reactor of inventive embodiments.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but not as a limitation of the invention.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
Fig. 1 is the structural representation of the immersion circulating biological filter tank reactor of inventive embodiments.As shown in Figure 1, immersion circulating biological filter tank reactor, this circulating biological filter tank reactor is arranged in sewage lagoon 15, and this circulating biological filter tank reactor comprises:
Tank body 1, is filled with filtrate 2 in tank body 1, tank body 1 is provided with water outlet 101 and water-in 102, and water outlet 101 is higher than wastewater level 16 in sewage lagoon 15, and water-in 102 is positioned at filtrate district, and water-in 102 is lower than wastewater level 16 in sewage lagoon 15;
Extraction pipe 6, is located in tank body 1, and upper end is filtrate outlet, and lower end is filtrate entrance;
Diffuser 9, is located at the upper end of extraction pipe 6;
Distributor 5, is located at the bottom of extraction pipe 6, and extraction pipe 6 is through distributor 5;
Aeration tube 11, the aeration section of aeration tube 11 is positioned at the bottom of tank body 1;
Backwash inlet pipe 3, stretches in tank body 1, and the air outlet of backwash inlet pipe 3 is positioned at the below of the filtrate entrance of extraction pipe 6.
The immersion circulating biological filter tank reactor of the embodiment of the present invention is arranged in sewage lagoon, sewage in sewage lagoon directly enters from the water-in tank body, without the need to additionally arranging sewage water equipment, and the extra land occupation in the biological filter of the embodiment of the present invention, decrease floor space, be beneficial to and existing dirt process place is transformed.The circulating biological filter tank of the embodiment of the present invention is immersed in sewage lagoon, and change water intake mode, biomass is higher, improves treatment effect.
Preferred as above-described embodiment, the cloth conical surface of distributor 5 is evenly equipped with solarization air cap, and the aeration section of aeration tube 11 is positioned at distributor 5 bottom.The diameter of solarization air cap is 3mm.Arranged by this kind, distributor 5 possesses the function of uniform distribution and aeration simultaneously.During aeration, gas enters the bottom of distributor 5 by aeration tube, and gas fully contacts with the water of distributor 5 bottom, and the mixing wastewater with air time is long, improves the oxygen level in water, and reach capacity dissolved oxygen.Carry out aeration by solarization air cap uniform on the cloth conical surface of distributor 5, make aeration more even.Avoid when adopting aeration tube, gas is discharged from the less weakness of biomass, and cause all not aerations, aeration is uneven.The aeration section of aeration tube is horizontally disposed annular.The aeration section of aeration tube comprises stainless steel supporting pipeline and is coated on the film of stainless steel supporting pipeline outer wall, and film evenly gathers aerating pore.Distributor 5 arranges solarization air cap, and the bottom aeration section of aeration tube 11 is located in distributor 5, now aeration process is as follows: aeration section carries out aeration, air fully contacts with the water of bottom in distributor 5 and forms strong mixing wastewater with air stirring action, improve the oxygen level in water, form gas liquid mixture, unnecessary air overflows water body, upper space in distributor 5 forms a underwater air room, then be spread in along the solarization air cap uniform secondary on the cloth conical surface of distributor in the filter material layer in outside, fully contact with the water body between filtrate and filter material layer; In distributor, the gas liquid mixture (containing saturated dissolved oxygen in water after aeration diffusion) of lower space is also spread in the filter material layer outside distributor along solarization air cap under the effect of pressure of blast simultaneously, at this moment, between the inside of distributor and outside filtrate, form a liquid circulation process, and this process will be conducive to influent quality uniformly distributing and distribution.This distributor 5 can realize filtrate (Gu) uniform, liquid (liquid) water quality of uniform, air (gas) and aeration effect distributes three comprehensive functions such as uniform, is the important inner monomer members guaranteeing that circulating biological filter tank reactor uses.
Preferred as above-described embodiment, be provided with inner sleeve 4 in tank body 1, form annular space between inner sleeve 4 and tank body 1, distributor 5 is positioned at inner sleeve 4, the annular space portion that water-in 102 is formed between inner sleeve 4 and tank body 1.The present embodiment makes pending water at the inside and outside formation partial circulating of inner sleeve 4 by arranging inner sleeve 4, and distribution and water distribution are regulated, A/O function is completely realized in tank body, namely the formation anaerobic zone, annular space portion (A section) formed between inner sleeve 4 and tank body 1, forms aerobic zone (O section) in inner sleeve 4.Embodiment improves wastewater treatment efficiency.
Preferred as above-described embodiment, be provided with water inlet pipe 7 in tank body 1, water inlet pipe 7 is connected with water-in 102, water inlet pipe 7 go out mouth down.The present embodiment, by setting out the water inlet pipe 7 of mouth down, first flows downward after making sewage enter tank body 1, and then is upward through filtrate 2, makes sewage fully and the biological that filtrate 2 grows.In addition, after the water inlet pipe 7 of the present embodiment combines with inner sleeve 4, facilitate the partial circulating of sewage in tank body 1, contribute to realizing A/O function completely in tank body 1.
Preferred as above-described embodiment, water outlet 101 is for being positioned at the crest of weir of tank body 1 upper end.The clear water on top can directly be discharged in sewage lagoon 15, realizes the effluent cycle process in sewage lagoon.Wherein, crest of weir adopts Height Adjustable crest of weir.By regulating the height of crest of weir to realize control to aquifer yield, and then the water level 8 controlled in tank body 1 and effluent cycle processing speed.
Preferred as above-described embodiment, the material of tank body 1 is stainless steel.Adopt the circulating biological filter tank of the previously prepared good embodiment of the present invention of stainless steel materials, be then directly installed in sewage lagoon.Certain employing concrete placement also can realize pre-manufactured, and rear installation is convenient and swift.
Water-in 102 is generally four, and the sidewall of tank body 1 is uniformly distributed.Certainly, except being arranged on the water-in 102 on the sidewall of tank body 1, water-in can also be set in the bottom of tank body 1.
In the embodiment of the present invention, diffuser 9 adopts folded plate type diffuser, and folded plate type diffuser upper end is connected with tank body 1 is airtight.Certainly, diffuser 9 can adopt arbitrary applicable diffuser in prior art.
Tank body 1 inwall is provided with strut member 12, for supports cloth glassware.Strut member 12 can be in step-like, so that support inner sleeve 4 simultaneously.Strut member can be vertically disposed back up pad.
Filtrate 2 is spherical haydite or column type active carbon particles or other spherical filtrate be applicable to and granule filter material.
Backwash inlet pipe 3 in the embodiment of the present invention can stretch in tank body 1 from any position, as long as the air outlet of backwash inlet pipe 3 is positioned at the below of the filtrate entrance of extraction pipe 6.In embodiment shown in figure, be provided with pipe core 10 in tank body, backwash inlet pipe 3 and extraction pipe 6 are all located in pipe core 10, to protect backwash feed-pipe 3 and extraction pipe 6.
In the present embodiment, tank body 1 is fixed by anchor 13 and sewage lagoon 15.The horizontal upper end at sewage lagoon 15 of anchor 13, tank body 1 top and anchor 13 are fixed.
The bottom of sewage lagoon 15 is provided with shore pipe 14.Regularly the mud deposited to bottom sewage lagoon 15 can be discharged.
Multiple sewage lagoon 15 arranging the circulating biological filter tank reactor of the embodiment of the present invention is used in conjunction, and can realize the multiple-stage treatment to sewage.
On the other hand, embodiments provide a kind of sewage water treatment method, the method of the present embodiment adopts the immersion circulating biological filter tank reactor described in above-mentioned any embodiment, and biological filter reactor is placed in sewage lagoon, and the sewage water treatment method of the present embodiment comprises the steps:
Scavenging process: under aeration tube aeration oxygen supply condition, the air-flow that aeration produces makes water level in tank body obtain lifting, higher than the water level of the outer sewage lagoon of tank, the water of tank body internal upper part overflows tank body by the water outlet on tank body top, flows into sewage lagoon, and the sewage simultaneously in sewage lagoon fills in tank body by water-in, and through above filtrate to tank body, then overflow tank body, enter sewage lagoon, form inner-outer circulation; When being provided with inner sleeve, while sewage carries out inner-outer circulation, the air-flow that aeration produces will concentrate on inner sleeve interior region and rise, sewage outside in inner sleeve in tank body is driven to form internal recycle, formation anaerobic zone, annular space portion between inner sleeve and tank body, form aerobic zone in inner sleeve inside, sewage is constantly circulated to anaerobic zone by aerobic zone;
Backwash process: pass into backwash pressurized gas by backwash inlet pipe in tank body, the current that backwash pressurized gas drives carry filtrate and sweep along base sludge from the upwards extracting of extraction pipe lower end, and enter diffuser by extraction pipe upper end, now the microbial film on ceramic grain filter surface is thoroughly separated with filtrate under air water strong disturbance with the mud of sweeping along, mud after separation is under aeration state, be suspended in reactor tank body top water, tank body is overflowed from water outlet with current, enter sewage lagoon outside tank body, in sewage lagoon, sewage is in quiet heavy state, in the sludge hopper of sludge settling bottom sewage lagoon, and filtrate is evenly scattered under gravity and by distributor cloth.
The biological filter reactor of the embodiment of the present invention in use has following working cycle.
First working cycle: sewage and the interior inner-outer circulation processing rear sewage of circulating biological filter tank reactor tank body in sewage lagoon;
The submergence of reactor tank body is positioned in sewage pool body, and under aeration oxygen supply condition, in tank body, water level will obtain lifting, higher than the water level of the outer sewage lagoon of tank body, by the height adjustable water outlet crest of weir on tank body top, after the top process in tank body, sewage quantitatively will overflow tank body, flow into sewage lagoon top; Because tank body lower part arranges water-in, (general circumference evenly arranges 4, bottom arranges 1) communicate with sewage lagoon, under the effect of similar air lift principle, sewage bottom sewage lagoon enters reactor tank interior by supplementing, above filtrate to tank body, then overflow tank body, enter sewage lagoon, form inner-outer circulation.
According to this working cycle, can adopt plural serial stage treatment process, each single-stage sewage lagoon is provided with connected entrance, until the water outlet of end sewage lagoon, does not substantially have head loss; And multiple reactor also can be installed, such layout in single-stage sewage lagoon, the water outlet processing more high-quality can be obtained, successfully solve multiple tank body and arrange and big yield modular combination application problem.
Second working cycle: the repeats itself (internal recycle) of sewage in the reactor tank body of circulating biological filter tank;
By arranging inner sleeve in reactor tank body, by bottom aeration in tank body, air-flow will concentrate on inner sleeve interior region and rise, and drive sewage outside in inner sleeve in tank body to form circulation, prerequisite is the Control strain water yield, and the quantity of circulating water that inner sleeve air-flow is driven is greater than the spilling water yield.
Based on this working cycle, distinguished by outside aeration and non-aeration in inner sleeve, aerobic zone and anaerobic zone is formed in filtrate in whole process tank body, sewage is constantly circulated to anaerobic zone by aerobic zone, if sewage is after aerobic zone realizes nitration reaction process, the nitrate ion in sewage will enter anaerobic zone with current, then contain the anaerobic zone of sewage in tank body of enriching carbon source with sewage lagoon and mix, to anti-nitration reaction be there is, reach the treatment effect removing total nitrogen.
3rd working cycle: under backwash state, the upper and lower circulation of filtrate in filter material layer in tank body;
Sewage lagoon is not intake, now enter the backwash state of system, the pressurized air entered by backwash inlet pipe drives current, current drive filtrate upwards to be flowed by tank base in extraction pipe, base sludge swept along by filtrate, after diffuser by tank body top, filtrate evenly becomes scattered about the top of filter bed under gravity; In this process, the microbial film of filter material surface is thoroughly separated with filtrate under air water strong disturbance with the mud of sweeping along, mud after separation is under aeration state, be suspended in reactor tank body top water, reactor tank body is overflowed with current, enter sewage lagoon outside tank body, in sewage lagoon, sewage is in quiet heavy state, and in the sludge hopper of sludge settling bottom sewage lagoon, regularly suction enters sludge treating system.
After backwash operation certain hour (about 1-2 hour), system can enter normal processing in running status, regains the process water outlet of high-quality.
Above embodiment is only exemplary embodiment of the present invention, and be not used in restriction the present invention, protection scope of the present invention is defined by the claims.Those skilled in the art can in essence of the present invention and protection domain, and make various amendment or equivalent replacement to the present invention, this amendment or equivalent replacement also should be considered as dropping in protection scope of the present invention.
Claims (10)
1. immersion circulating biological filter tank reactor, is characterized in that, described circulating biological filter tank reactor is arranged in sewage lagoon, and described circulating biological filter tank reactor comprises:
Tank body, is filled with filtrate in tank body, and tank body is provided with water outlet and water-in, and water outlet is higher than wastewater level in sewage lagoon, and water-in is positioned at filtrate district, and water-in is lower than wastewater level in sewage lagoon;
Extraction pipe, is located in tank body, and upper end is filtrate outlet, and lower end is filtrate entrance;
Diffuser, is located at the upper end of extraction pipe;
Distributor, is located at the bottom of extraction pipe, and described extraction pipe is through described distributor;
Aeration tube, the aeration section of described aeration tube is positioned at the bottom of tank body;
Backwash inlet pipe, the air outlet of described backwash inlet pipe is positioned at the below of the filtrate entrance of extraction pipe.
2. immersion circulating biological filter tank according to claim 1 reactor, it is characterized in that, the cloth conical surface of described distributor is evenly equipped with solarization air cap, and described aeration tube aeration section is positioned at distributor bottom.
3. immersion circulating biological filter tank according to claim 2 reactor, is characterized in that, the diameter of described solarization air cap is 3mm.
4. immersion circulating biological filter tank according to claim 1, is characterized in that, the aeration section of described aeration tube is horizontally disposed annular.
5. immersion circulating biological filter tank according to claim 1 reactor, is characterized in that, the aeration section of described aeration tube comprises stainless steel supporting pipeline and is coated on the film of stainless steel supporting pipeline outer wall, and described film evenly gathers aerating pore.
6. immersion circulating biological filter tank according to claim 1 reactor, it is characterized in that, in described tank body, be provided with inner sleeve, between described inner sleeve and tank body, form annular space, described distributor is positioned at inner sleeve, the annular space portion that described water-in is formed between inner sleeve and tank body.
7. immersion circulating biological filter tank according to claim 1 reactor, it is characterized in that, be provided with water inlet pipe in described tank body, water inlet pipe is connected with water-in, water inlet pipe go out mouth down.
8. immersion circulating biological filter tank according to claim 1 reactor, it is characterized in that, described water outlet is the crest of weir being positioned at tank body upper end, and described crest of weir is Height Adjustable crest of weir.
9. immersion circulating biological filter tank according to claim 1 reactor, is characterized in that, the material of described tank body is stainless steel.
10. sewage water treatment method, adopt the immersion circulating biological filter tank reactor described in any one of claim 1-9, described biological filter reactor is placed in sewage lagoon, and described sewage water treatment method comprises the steps:
Scavenging process: under aeration tube aeration oxygen supply condition, the air-flow that aeration produces makes water level in tank body obtain lifting, higher than the water level of the outer sewage lagoon of tank, the water of tank body internal upper part overflows tank body by the water outlet on tank body top, flows into sewage lagoon, and the sewage simultaneously in sewage lagoon fills in tank body by water-in, and through above filtrate to tank body, then overflow tank body, enter sewage lagoon, form inner-outer circulation; When being provided with inner sleeve, while sewage carries out inner-outer circulation, the air-flow that aeration produces will concentrate on inner sleeve interior region and rise, sewage outside in inner sleeve in tank body is driven to form internal recycle, formation anaerobic zone, annular space portion between inner sleeve and tank body, form aerobic zone in inner sleeve inside, sewage is constantly circulated to anaerobic zone by aerobic zone;
Backwash process: pass into backwash pressurized gas by backwash inlet pipe in tank body, the current that backwash pressurized gas drives carry filtrate and sweep along base sludge from the upwards extracting of extraction pipe lower end, and enter diffuser by extraction pipe upper end, now the microbial film on ceramic grain filter surface is thoroughly separated with filtrate under air water strong disturbance with the mud of sweeping along, mud after separation is under aeration state, be suspended in reactor tank body top water, tank body is overflowed from water outlet with current, enter sewage lagoon outside tank body, in sewage lagoon, sewage is in quiet heavy state, in the sludge hopper of sludge settling bottom sewage lagoon, and filtrate is evenly scattered under gravity and by distributor cloth.
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|---|---|---|---|---|
| US5609753A (en) * | 1995-06-08 | 1997-03-11 | Prazmowski; B. Donald | Biofilter |
| CN1709810A (en) * | 2005-05-27 | 2005-12-21 | 湖北大学 | Domestic sewage denitrifying-dephosphorizing method and apparatus |
| CN201046930Y (en) * | 2006-09-21 | 2008-04-16 | 江苏博大环保股份有限公司 | Reentrant flow inner loop aeration biological filter tank |
| CN102849848A (en) * | 2012-09-26 | 2013-01-02 | 北京市环境保护科学研究院 | Inner circulation bio-filter reactor and sewage treatment method |
| CN204981335U (en) * | 2015-06-30 | 2016-01-20 | 重庆云图工程技术有限公司 | Submergence formula circulation biological filter reactor |
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2015
- 2015-06-30 CN CN201510385451.6A patent/CN104925948B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5609753A (en) * | 1995-06-08 | 1997-03-11 | Prazmowski; B. Donald | Biofilter |
| CN1709810A (en) * | 2005-05-27 | 2005-12-21 | 湖北大学 | Domestic sewage denitrifying-dephosphorizing method and apparatus |
| CN201046930Y (en) * | 2006-09-21 | 2008-04-16 | 江苏博大环保股份有限公司 | Reentrant flow inner loop aeration biological filter tank |
| CN102849848A (en) * | 2012-09-26 | 2013-01-02 | 北京市环境保护科学研究院 | Inner circulation bio-filter reactor and sewage treatment method |
| CN204981335U (en) * | 2015-06-30 | 2016-01-20 | 重庆云图工程技术有限公司 | Submergence formula circulation biological filter reactor |
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