CN102344198B - Real-time control apparatus for floated aerobic biofilm A<2>O system for treating low C/N sewage, and method thereof - Google Patents
Real-time control apparatus for floated aerobic biofilm A<2>O system for treating low C/N sewage, and method thereof Download PDFInfo
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- CN102344198B CN102344198B CN201110029757.XA CN201110029757A CN102344198B CN 102344198 B CN102344198 B CN 102344198B CN 201110029757 A CN201110029757 A CN 201110029757A CN 102344198 B CN102344198 B CN 102344198B
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Abstract
The present invention discloses a real-time control apparatus for a floated aerobic biofilm A<2>O system for treating low C/N sewage, and a method thereof. The real-time control apparatus for the floated aerobic biofilm A<2>O system comprises a raw water tank (1), an aerobic biofilm A<2>O reactor (2), a secondary settling tank (3), a DO meter (5), a on-line tester (6), a computer (7) and a process controller (8). The real-time control method comprises: online collecting ammonia nitrogen concentration in a effluent tank, wherein the real-time control system is adopted to adjust the aeration rate of an air pump; online collecting nitrate nitrogen concentration in the effluent tank, wherein the real-time control system is adopted to adjust the reflux ratio of the nitrified liquid of a peristaltic pump; online collecting the PO4<3->-P concentration in the effluent tank, wherein the real-time control system is adopted to adjust a bypass flow ratio of the peristaltic pump; online collecting the TOC concentration in the effluent tank, wherein the real-time control system is adopted to adjust the aeration rate of the air pump. The method provided by the present invention is one of the most effective methods for treating the low C/N sewage and synchronously denitriding and removing phosphorus. The effluent quality through the apparatus and the method provided by the present invention stably achieve the national one-level (A) standard.
Description
Technical field
The invention belongs to sewage treatment area, C/N sewage aerobic microbial film A is hanged down in a kind of processing of specific design
2the real-time control apparatus of O technique and method.
Background technology
The excessive emissions of the nutritive elements such as nitrogen phosphorus is the major reason that causes water body " eutrophication ", and it has formed serious threat to industrial and agricultural production and people's lives.A
2o is as the simplest synchronous denitrogen dephosphorus technology, has simple structure, HRT is short, the design and operation experience ripe, control the series of advantages such as the little and difficult generation sludge bulking of complicacy, is the main process of China's municipal wastewater treatment plant.Yet, A
2nitrifier in O, denitrifying bacteria and the polyP bacteria contradiction on organic loading, mud age and carbon source demand is difficult to obtain in single biochemical system the good result of denitrogenation dephosphorizing simultaneously, hampers the application of Biological Nitrogen Removal Processe.Carbon source is to affect one of important factor of sewage disposal, and China's the most obvious feature of municipal effluent is exactly low C/N, and this just requires the sanitary sewage of low C/N is carried out the denitrogenation dephosphorizing of the degree of depth.Nearly all synchronous denitrogen dephosphorus technology is all that single sludge system is that the different physiological habit microorganisms such as nitrobacteria, denitrifying bacterium and polyP bacteria live in same microbial environment.The microorganism not identical to environmental requirement is living together, and can't guarantee that they can grow up under optimum environment separately, and this must affect treatment effect.Be apparent that most that polyP bacteria and nitrobacteria require to make denitrogenation and dephosphorization to form the contradiction of opposition to the difference of sludge age, often become the major cause that efficiency is unstable, compliance rate is low of single sludge system synchronous denitrification dephosphorizing.
For A
2the existing defect of O technique, proposed to process low C/N sewage aerobic microbial film A
2the real-time control apparatus of O technique and method, this technique is put into aerobic section by biologic packing material, and its main purpose is effectively to complete nitrification.
Summary of the invention
The objective of the invention is to provide a kind of processing to hang down C/N sewage aerobic microbial film A
2o (Floated aerobic biofilm A
2o system) real-time control apparatus of technique and method, solve the advanced nitrogen dephosphorization technique that hangs down the C/N sanitary sewage.
1, mechanism of the present invention is: former water enters pre-oxygen-starved area and anaerobic zone in two separate ranks simultaneously, in pre-oxygen-starved area, TOC in former water is utilized by the denitrifying bacteria in the returned sluge from second pond, denitrifying bacteria be take TOC as electron donor, take nitrate nitrogen as electron acceptor(EA), denitrification occurs, and nitrate nitrogen is converted into nitrogen, fully releases phosphorus for mud at anaerobic zone condition is provided; At anaerobic zone, polyP bacteria utilizes the synthetic internal carbon source PHAs of the voltaile fatty acid (VFAs) in former water and is stored in body, discharges a large amount of phosphorus simultaneously; Mixed solution enters oxygen-starved area, and what enter also has the nitrification liquid from the aerobic zone end simultaneously, and it is electron acceptor(EA) that denitrifying bacteria be take nitrate nitrogen and nitrite nitrogen, take TOC as electron acceptor(EA), denitrification denitrogenation; It is electron acceptor(EA) that DPAOs be take nitrate and nitrosonium salts nitrogen, take PHAs the electron donor denitrification dephosphorization, has realized " carbon is dual-purpose ", has saved 50% TOC; Mixed solution enters aerobic zone, and the major function of aerobic zone is that the nitrifier on aerobic biologic membrane is oxidized to nitrite nitrogen and nitrate nitrogen, the remaining phosphorus of removal and remaining TOC by ammonia nitrogen; Aerobic zone goes out water mixed liquid and enters second pond and carry out mud-water separation.
2, technical scheme of the present invention: the aerobic biologic membrane A that processes low C/N municipal effluent
2the real-time control apparatus of O technique is by raw water box 1, A
2o reactor 2, second pond 3, water tank 4, DO instrument 5, on-line testing instrument 6, computer 7 and process controller 8 form.Raw water box 1 is connected with anaerobic zone 12 with pre-oxygen-starved area 11 in two separate ranks through peristaltic pump 9, anaerobic zone 12 is connected with oxygen-starved area 13, oxygen-starved area 13 is connected with aerobic zone 14, aerobic zone 14 mixture export ends are connected with oxygen-starved area 13 by peristaltic pump 9, aerobic zone 14 is connected with second pond 3, second pond 3 bottom sludge outlet ends are connected with pre-oxygen-starved area 11 through peristaltic pump 9, and excess sludge is from 16 discharges of mud discharging mouth; Real-time control system by DO instrument 5, on-line testing instrument (test out ammonia nitrogen concentration in water tank, nitrite nitrogen concentration, nitrate,
concentration and TOC concentration), computer 7 and process controller 8 form; Online survey instrument is installed in water tank 4, and the DO instrument is connected with computer 7 with the on-line testing instrument, and computer 7 is connected with process controller 8, and process control is that device 8 is connected with peristaltic pump 9 and air pump 10.
3, aerobic biologic membrane by-pass flow A
2the real-time control apparatus of O technique and method comprise the following steps:
1) former water pumps into respectively A through peristaltic pump 9 in two separate ranks from raw water box 1
2the pre-oxygen-starved area 11 of O reactor 2 and anaerobic zone 12, enter into the returned sluge from second pond 3 that also has of pre-oxygen-starved area 11 simultaneously, at pre-oxygen-starved area denitrifying bacteria, the nitric nitrogen carried in returned sluge is removed, in order to avoid affect the phosphorus effect of releasing of anaerobic zone, its by-pass flow ratio that enters into pre-oxygen-starved area 11 and anaerobic zone 12 is by real-time control system adjustment (the by-pass flow ratio is 1: 9 or 2: 8 or 3: 7).At anaerobic zone 12, polyP bacteria absorbs the organism in former water, and is stored in its organism with the form of PHAs, discharges a large amount of phosphorus simultaneously.
2) mixed solution of anaerobic zone 12 enters oxygen-starved area 13, enters the nitrification liquid from aerobic zone 14 ends that also has of oxygen-starved area 13 simultaneously, and what complete in this stage is that denitrification and anoxic are inhaled the phosphorus effect.
3) mixed solution of oxygen-starved area 13 enters aerobic zone 14 subsequently, and the Main Function in this stage is nitrification, and further absorbs oxygen-starved area and do not suck remaining phosphorus, removes 2%～5% organism simultaneously.
4) mixed solution from aerobic zone 14 enters second pond 3, realizes the mud-water separation of mixed solution, the supernatant liquor discharge.
5) on-line testing instrument 6 respectively the ammonia nitrogen concentration in online acquisition water tanks 4, nitrous acid nitrogen concentration, nitrate,
concentration and TOC concentration, by computer 7 control process controllers 8, adjust the aeration rate of air pump 10 and the reflux ratio of peristaltic pump 9:
5.1) ammonia nitrogen concentration in on-line testing instrument 6 online acquisition water tanks 4, by computer 7 control process controllers 8, adjust the aeration rate of air pump 10; As ammonia nitrogen concentration>=1mgL
-1the time, strengthen aeration rate, making DO in aerobic zone 14 ends is 2.0～3.0mgL
-1, as ammonia nitrogen concentration≤0.1mgL
-1the time, the minimizing aeration rate is 1.0～2.0mgL
-1;
5.2) nitrous acid nitrogen concentration in on-line testing instrument 6 online acquisition water tanks 4, by computer 7 control process controllers 8, adjust the aeration rate of air pump 10; As nitrous acid nitrogen concentration>=0.5mgL
-1the time, strengthen aeration rate, making DO in aerobic zone 14 ends is 2.0～3.0mgL
-1, as nitrous acid nitrogen concentration≤0.5mgL
-1the time, the minimizing aeration rate is 1.0～2.0mgL
-1;
5.3) nitrate in on-line testing instrument 6 online acquisition water tanks 4, by computer 7 control process controllers 8, adjust the nitrification liquid reflux ratio of peristaltic pump 9, as nitrate>=13mgL
-1the time, strengthening reflux ratio is 300%～400%, as nitrate≤6.0mgL
-1the time, reduce reflux ratio 100%～200%;
5.4) PO in on-line testing instrument 6 online acquisition water tanks 4
4 3--P concentration, by computer 7 control process controllers 8, adjust peristaltic pump 9, works as PO
4 3--P concentration>=1.0mgL
-1the time, the by-pass flow ratio was increased to 2: 8 by 1: 9, worked as PO
4 3--P concentration≤0.1mgL
-1the time, make by-pass flow than by 3: 7, being reduced to 2: 8.
The present invention processes low C/N sewage aerobic microbial film A
2the real-time control apparatus of O technique and method, compare with existing advanced nitrogen dephosphorization technique, has following advantages:
1) nitrification of this technique mainly completes on biologic packing material, and dephosphorization, by Sludge System, has solved nitrobacteria and polyP bacteria sludge age is required to different contradiction, in each comfortable best environment that makes them, grows, and is conducive to the stable of system.
2) Prepositive denitrification of technique is configured to denitrification dephosphorization condition is provided, and has solved the technical difficult problem that in low C/N sewage treatment process, carbon source lacks, and saves to greatest extent TOC, under the prerequisite that guarantees water quality treatment, has reduced running cost.
3) design of the structure of by-pass flow ratio has guaranteed that the nitrate nitrogen in the returned sluge, nitrite nitrogen are effectively removed in pre-oxygen-starved area, for polyP bacteria, at the phosphorus of fully releasing of anaerobic zone, provides absolute anaerobic environment.
4) when processing the sanitary sewage of low C/N, A
2o technique can provide an adapt circumstance to denitrifying phosphorus removing bacteria, and denitrification dephosphorization will be the principal mode of system dephosphorization, can save TOC.
5) traditional A
2o technique need to be very long aerobic zone carry out nitrification, its generation time of mainly considering nitrobacteria is longer, and the nitrification of this technique is mainly carried out on the biologic packing material in aerobic zone, thereby has reduced the length of aerobic zone, reduce aeration rate, reduced energy consumption.
6) ammonia nitrogen concentration in on-line testing instrument on-line monitoring water tank, guaranteeing to adjust in real time aeration rate under water outlet ammonia nitrogen prerequisite up to standard, reduced aeration energy consumption; Also can go out the DO concentration of aerobic zone end by DO instrument on-line monitoring, adjust in real time aeration rate, further optimized Real-Time Control Strategy simultaneously.
7) nitric nitrogen, nitrous acid nitrogen concentration in on-line testing instrument on-line monitoring water tank, guaranteeing that water outlet meets under the prerequisite of emission standard, adjust the nitrification liquid reflux ratio in real time, and the energy avoids waste.
8) in on-line testing instrument on-line monitoring water tank
concentration, in water outlet
concentration meets under the condition of emission standard, controls in real time the nitrification liquid when by-pass flow ratio that refluxes, and has saved the energy.
9) real-time control system is simple in structure, and level of automation is high, and management maintenance is convenient, and labour intensity is low, for the upgrading of municipal sewage plant provides direction.
Beneficial effect of the present invention:
Adopt and process low C/N sewage aerobic microbial film A
2the real-time control apparatus of O technique and method, can solve A
2the problem of polyP bacteria and nitrobacteria sludge age contradiction in O technique.Filler is placed in to A
2the aerobic zone of O technique, nitrobacteria can be attached on biologic packing material, thereby can effectively extend the sludge age of nitrobacteria, and then improves nitrated rate.The residence time that can reduce aerobic zone simultaneously reduces the length of aerobic zone.The present invention processes low C/N sewage aerobic microbial film A
2the real-time control apparatus of O technique and method can be widely used in the sanitary sewage disposal in large, medium and small city, and transformation and the optimization and upgrading of old water factory had to certain reference value, and under low C/N condition, the advanced nitrogen dephosphorization of sewage provides effective theoretical foundation.
The accompanying drawing explanation
Fig. 1 processes low C/N sewage aerobic microbial film A
2the real-time control apparatus of O technique and method schematic diagram;
1-inlet chest in Fig. 1; 2-A
2the O system; The 3-second pond; The 4-water tank; The 5-DO instrument; 6-on-line testing instrument; The 7-computer; The 8-process controller; The 9-peristaltic pump; The 10-air pump; The pre-oxygen-starved area of 11-; The 12-anaerobic zone; 13-oxygen-starved area 1; The 14-aerobic zone; The 15-agitator; 16-excess sludge discharge mouth; 17-active bio filler.
Embodiment
In conjunction with Fig. 1, describe working procedure of the present invention in detail
1, the low C/N sewage aerobic microbial film A of a kind of processing
2the real-time control apparatus of O technique is by raw water box 1, aerobic biologic membrane A
2o reactor 2, second pond 3, water tank 4, DO instrument 5, on-line testing instrument 6, computer 7 and process controller 8 form.Raw water box 1 is connected with anaerobic zone 12 with pre-oxygen-starved area 11 in two separate ranks through peristaltic pump 9, anaerobic zone 12 is connected with oxygen-starved area 13, oxygen-starved area 13 is connected with aerobic zone 14, aerobic zone 14 exit end are connected with oxygen-starved area 13 by peristaltic pump 9, aerobic zone 14 is connected with second pond 3, second pond 3 bottom sludge outlet ends are connected with pre-oxygen-starved area 11 through peristaltic pump 9, and excess sludge is from 16 discharges of mud discharging mouth; Real-time control system by DO instrument 5, on-line testing instrument 6 (test out ammonia nitrogen concentration in water tank, nitrite nitrogen concentration, nitrate,
concentration and TOC concentration), computer 7 and process controller 8 form; The on-line testing instrument is installed in water tank 4, and the DO instrument is connected with computer 7 with the on-line testing instrument, and computer 7 is connected with process controller 8, and process controller 8 is connected with peristaltic pump 9 and air pump 10.
2, aerobic biologic membrane A
2the real-time control apparatus of O technique and method comprise the following steps:
1) former water pumps into respectively A through peristaltic pump 9 in two separate ranks from raw water box 1
2the pre-oxygen-starved area 11 of O reactor 2 and anaerobic zone 12, enter into the returned sluge from second pond 3 that also has of pre-oxygen-starved area 11 simultaneously, in pre-oxygen-starved area, denitrifying bacteria is removed the nitric nitrogen carried in returned sluge, in order to avoid affect the phosphorus effect of releasing of anaerobic zone, its by-pass flow ratio that enters into pre-oxygen-starved area 11 and anaerobic zone 12 is by real-time control system adjustment (the by-pass flow ratio is 1: 9 or 2: 8 or 3: 7).At anaerobic zone 12, polyP bacteria absorbs the TOC in former water, and is stored in its organism with the form of PHAs, discharges a large amount of phosphorus simultaneously.
2) mixed solution of anaerobic zone 12 enters oxygen-starved area 13, enters the nitrification liquid from aerobic zone 14 ends that also has of oxygen-starved area 13 simultaneously, and what complete in this stage is that denitrification and anoxic are inhaled the phosphorus effect.
3) aerobic zone 14 that the mixed solution of oxygen-starved area 13 enters subsequently, the Main Function in this stage is nitrification, and further absorbs oxygen-starved area and do not suck remaining phosphorus, removes 2%～5% organism simultaneously.
4) mixed solution from aerobic zone 14 process sections enters second pond 3, realizes the mud-water separation of mixed solution, the supernatant liquor discharge.
5) ammonia nitrogen concentration in on-line testing instrument 6 online acquisition water tanks 4, by computer 7 control process controllers 8, adjust the aeration rate of air pump 10; As ammonia nitrogen concentration>=1mgL
-1the time, strengthen aeration rate, making aerobic zone 14 end DO is 2.0～3.0mgL
-1, as ammonia nitrogen concentration≤0.1mgL
-1the time, reduce aeration rate, making DO is 1.0～2.0mgL
-1;
6) the nitrous acid nitrogen concentration in on-line testing instrument 6 online acquisition water tanks 4, by computer 7 control process controllers 8, adjust the aeration rate of air pump 10; As nitrous acid nitrogen concentration>=0.5mgL
-1the time, strengthen aeration rate, making aerobic zone 14 end DO is 2.0～3.0mgL
-1, as nitrous acid nitrogen concentration≤0.5mgL
-1the time, reduce aeration rate, making DO is 1.0～2.0mgL
-1;
7) nitrate in on-line testing instrument 6 online acquisition water tanks 4, by computer 7 control process controllers 8, adjust the nitrification liquid reflux ratio of peristaltic pump 9, as nitrate>=13mgL
-1the time, strengthening reflux ratio is 300%～400%, as nitrate≤6.0mgL
-1the time, reduce reflux ratio 100%～200%;
8) in on-line testing instrument 6 online acquisition water tanks 4
concentration, by computer 7 control process controllers 8, adjust peristaltic pump 9, when
concentration>=1.0mgL
-1the time, the by-pass flow ratio was increased to 2: 8 by 1: 9, when
concentration≤0.1mgL
-1the time, by-pass flow is than by 3: 7, being reduced to 2: 8.
Using the discharge of certain university's service facility community real life sewage as subjects (pH=6.4～7.5, TOC=60～110mg/L, ammonia nitrogen concentration=50～75mg/L,
average C/N is than 3.8).A
2o consists of 9 lattice chambers, and total useful volume is 30.5L, first Shi Yu oxygen-starved area, lattice chamber, subsequently 2 is anaerobic zone, the anaerobic zone back is 2 oxygen-starved areas, and remaining 4 is aerobic zone, and the volumetric ratio of pre-oxygen-starved area, anaerobic zone, oxygen-starved area and aerobic zone is 1: 2: 2: 4.A
215.2 ℃ of the water inlet medial temperatures of O, flooding quantity is 3.8L/h, and DO is controlled at 3mg/L, and corresponding HRT is 8h, and MLSS is about the 4000mg/L left and right, and SRT is 15d, and nitrification liquid refluxes 200%, sludge reflux 100%.TOC≤15mg/L, TN in final outflow water (ammonia nitrogen+nitrate nitrogen+nitrite nitrogen)≤15mg/L,
reach country-level (A) emission standard.
Claims (1)
1. one kind is utilized real-time control apparatus to process low C/N sewage aerobic microbial film A
2the technique of O, is characterized in that,
Described device comprises raw water box (1), A
2o reactor (2), second pond (3) and real-time control system, raw water box (1) is connected with anaerobic zone (12) with pre-oxygen-starved area (11) in two separate ranks through peristaltic pump (9), anaerobic zone (12) is connected with oxygen-starved area (13), oxygen-starved area (13) is connected with aerobic zone (14), aerobic zone (14) mixture export end is connected with oxygen-starved area (13) by peristaltic pump (9), aerobic zone (14) is connected with second pond (3), second pond (3) bottom sludge outlet end is connected with pre-oxygen-starved area (11) through peristaltic pump (9), excess sludge discharges from mud discharging mouth (16), described real-time control system is by DO instrument (5), on-line testing instrument (6), computer (7) and process controller (8) form, wherein the on-line testing instrument is arranged in water tank (4), DO instrument (5) is connected with computer (7) with on-line testing instrument (6), computer (7) is connected with process controller (8), and process controller (8) is connected with peristaltic pump (9) and air pump (10),
Comprise the following steps:
Step 1: former water pumps into respectively A through peristaltic pump (9) in two separate ranks from raw water box (1)
2the pre-oxygen-starved area (11) of O reactor (2) and anaerobic zone (12), enter into the returned sluge from second pond (3) that also has of pre-oxygen-starved area (11) simultaneously, at pre-oxygen-starved area denitrifying bacteria, residue nitric nitrogen in returned sluge is removed, its by-pass flow ratio that enters into pre-oxygen-starved area (11) and anaerobic zone (12) is 1:9 or 2:8 or 3:7, in anaerobic zone (12), polyP bacteria absorbs the TOC in former water, and is stored in its organism with the form of PHAs, discharges a large amount of phosphorus simultaneously;
Step 2: the mixed solution of anaerobic zone (12) enters oxygen-starved area (13), enters the nitrification liquid from aerobic zone (14) end that also has of oxygen-starved area (13) simultaneously;
Step 3: the aerobic zone (14) that the mixed solution of oxygen-starved area (13) enters subsequently, the Main Function in this stage is nitrification, and further absorbs oxygen-starved area and do not suck remaining phosphorus, removes 2%～5% organism simultaneously;
Step 4: the mixed solution from aerobic zone (14) enters second pond (3), realizes the mud-water separation of mixed solution, the supernatant liquor discharge;
Step 5: on-line testing instrument (6) respectively the ammonia nitrogen concentration in online acquisition water tank (4), nitrous acid nitrogen concentration, nitrate,
concentration and TOC concentration, by computer (7) control process controller (8), adjust the aeration rate of air pump (10) and the reflux ratio of peristaltic pump (9):
Step 5.1: the ammonia nitrogen concentration in on-line testing instrument (6) online acquisition water tank (4), by computer (7) control process controller (8), adjust the aeration rate of air pump (10); As ammonia nitrogen concentration>=1mgL
-1the time, strengthen aeration rate, making DO in aerobic zone (14) end is 2.0～3.0mgL
-1, as ammonia nitrogen concentration≤0.1mgL
-1the time, the minimizing aeration rate is 1.0～2.0mgL
-1;
Step 5.2: the nitrous acid nitrogen concentration in on-line testing instrument (6) online acquisition water tank (4), by computer (7) control process controller (8), adjust the aeration rate of air pump (10); As nitrous acid nitrogen concentration>=0.5mgL
-1the time, strengthen aeration rate, making DO in aerobic zone (14) end is 2.0～3.0mgL
-1, as nitrous acid nitrogen concentration≤0.5mgL
-1the time, the minimizing aeration rate is 1.0～2.0mgL
-1;
Step 5.3: the nitrate in on-line testing instrument (6) online acquisition water tank (4), by computer (7) control process controller (8), adjust the nitrification liquid reflux ratio of peristaltic pump (9), as nitrate>=13mgL
-1the time, strengthening reflux ratio is 300%～400%, as nitrate≤6.0mgL
-1the time, reduce reflux ratio 100%～200%;
Step 5.4: in on-line testing instrument (6) online acquisition water tank (4)
concentration, by computer (7) control process controller (8), adjust peristaltic pump (9), when
concentration>=1.0mgL
-1the time, by-pass flow is increased to 2:8 than by 1:9, when
concentration≤0.1mgL
-1the time, by-pass flow is than by 3:7, being reduced to 2:8.
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| EP4279459A3 (en) | 2012-09-13 | 2023-12-13 | D.C. Water & Sewer Authority | Method and apparatus for nitrogen removal in wastewater treatment |
| KR20210129743A (en) * | 2013-03-14 | 2021-10-28 | 디.시. 워터 앤 수어 오쏘러티 | Method and apparatus for maximizing nitrogen removal from wastewater |
| JP6158691B2 (en) * | 2013-11-18 | 2017-07-05 | 株式会社東芝 | Organic wastewater treatment apparatus, organic wastewater treatment method, and organic wastewater treatment apparatus control program |
| CN104150716B (en) * | 2014-08-20 | 2016-04-06 | 哈尔滨工业大学 | A kind of biological treatment device process processing cold low temp area low carbon-nitrogen ratio sewage is utilized to tremble with fear the method for low temp area low carbon-nitrogen ratio sewage |
| CN104478081B (en) * | 2014-12-01 | 2016-03-23 | 中国矿业大学 | A kind of anaerobism also flows Anoxic/Aerobic reinforced phosphor-removing denitrifying technique |
| CN105481191B (en) * | 2016-01-21 | 2018-08-14 | 山东建筑大学 | A kind of mud decrement and denitrogenation dephosphorizing coupling processing apparatus and method |
| CN114538614B (en) * | 2022-02-07 | 2023-07-28 | 黑龙江工程学院 | Continuous flow enhanced synchronous nitrification and denitrification dephosphorization device and control method |
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| CN1285324A (en) * | 2000-09-22 | 2001-02-28 | 北京中环康裕环保工程技术有限公司 | Automatic controller for sewage treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1285324A (en) * | 2000-09-22 | 2001-02-28 | 北京中环康裕环保工程技术有限公司 | Automatic controller for sewage treatment process |
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