CN1329316C - Activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots - Google Patents
Activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots Download PDFInfo
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- CN1329316C CN1329316C CNB2005101231466A CN200510123146A CN1329316C CN 1329316 C CN1329316 C CN 1329316C CN B2005101231466 A CNB2005101231466 A CN B2005101231466A CN 200510123146 A CN200510123146 A CN 200510123146A CN 1329316 C CN1329316 C CN 1329316C
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Abstract
The present invention relates to a nitrogen and phosphorus removing method by active sludge through multipoint alternate water inflow, which is sewage treating engineering technique in environment engineering, and is economical and practical advanced technology suitable for nitrogen and phosphorus removal of domestic sewage and urban sewage. A multipoint alternate water inflow reaction tank body (1) forms closed cycle connection by the connection in series of five reaction tanks and one sedimentation tank, wherein the five reaction tanks are hydraulically communicated by communicating pipes (16); each reaction tank is provided with a perforated aerator pipe (17), a stirrer (2), a water feeding electromagnetic valve (5), an air supplying electromagnetic valve (8) and a sludge backflow electromagnetic valve (15). One operation period is divided into six stages, stage one, stage two and stage three form a semiperiod, stage four, stage five and stage six form the other semiperiod, the two semiperiods are symmetrical; water feeding points alternately change from stage one to stage six, and sludge mixed liquor reversely flows in the upper semiperiod and the lower semiperiod following the direction of water flows so as to automatically back flow.
Description
Technical field
The present invention is the sewage treatment project technology in the environmental engineering, especially is applicable to the economical and practical advanced technologies of sanitary sewage, municipal effluent dephosphorization denitrogenation, belongs to technical field of environment protection.
Background technology
The wastewater treatment in China level is lower at present, and main water system lake ammonia nitrogen, total phosphorus exceed standard seriously, and eutrophication problem is outstanding, and immediate offshore area red tide phenomenon happens occasionally.The control water pollution at first will be controlled the nitrogen and phosphorus pollution source that is discharged into water body.Nitrogen and phosphorus pollution is mainly derived from sanitary sewage and widespread pollution from the overuse of fertilizers and pesticides in rural area in the water body, and wherein sanitary sewage then is the primary pollution source of many water bodys.How strengthening dispersed wastewater handles for the control water pollution significant.Strict qualification (GB18918-2002) has been done to nitrogen phosphorus index in the sewage effluent by China's " urban wastewater treatment firm pollutant emission standard ".Large size city sewage work has formed sophisticated dephosphorization and denitrification process at present, but dephosphorization and denitrification effect is not very desirable in the practical application.And do not handle mostly for middle-size and small-size decentralized wastewater, existing processing mostly rests on the one-level processing horizontal, seldom takes the dephosphorization denitrogenation measure.China's " municipal sewage treatment and pollution prevention technique policy " regulation, wastewater treatment in China should be adhered to the centralization and decentralization combination, when strengthening centralized treatment of urban sewage, should pay attention to the processing of decentralized wastewater, for preventing and treating eutrophication, carry out dephosphorization denitrogenation for the sewage that enters sealing or semi-enclosed water body and handle.
Therefore, a kind of economy that is suitable for the different treatment scale, is fit to China's national situation of research and development, the sewage water dephosphorization denitrification advanced treatment process is extremely urgent efficiently.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots, being suitable for various treatment scales has the biological sewage treatment of de-scaling denitrogenation requirement, can satisfy contaminant degradation and dephosphorization denitrogenation requirement again, this control of process using time and combining of controlling in real time help realizing the intellectuality of technology simultaneously.
Technical scheme: the reaction tank body of alternated water intake from multi-spots of the present invention by five reaction tanks and a settling tank be composed in series closing the circulation be connected; Wherein adopt the communicating pipe hydraulic communication between five reaction tanks, all be provided with boring aeration pipe, agitator, entering water electromagnetic valve, air inlet magnetic valve, mud return flow solenoid valve in each reaction tank; A cycle of operation was made up of six stages:
Stage one. sewage enters first pond and second pond, and mud passes back into the 4th pond,
Stage two. sewage enters first pond and the 3rd pond, and mud passes back into the 3rd pond,
Stage three. sewage all enters second pond, and mud is back to second pond,
Stage four. sewage enters the 5th pond and the 4th pond, and mud passes back into second pond,
Stage five. sewage enters the 5th pond and the 3rd pond, and mud passes back into the 3rd pond,
Stage six. sewage all enters the 4th pond, and mud is back to the 4th pond;
Stage one, stage two, stage three constitute the semi-period, and stage four, stage five, stage six constitute other semi-period, and two semi-periods are symmetrical; Water entry alternately changed in stage one to the stage six, mud mixed liquid flows in two semi-periods commutations up and down with water (flow) direction, realize refluxing automatically, different semi-period current show as clockwise or counterclockwise respectively at the flow direction of Chi Tizhong in the plane, flow to the valve opening that is communicated with between a terminal reaction tank and the settling tank, be communicated with valve closes between upstream first reaction tank and settling tank.
Control mode is taked time control and with redox potential (ORP), the control mode that dissolved oxygen (DO) combines for the real-time control of parameter, concrete control scheme can be set to: be controlled to be the basis with the time, fixing dissolved oxygen DO respectively in five reaction tanks, the online detection probe of redox potential ORP, when being in denitrification or release the phosphorus function, follow the tracks of the continuous variable signal of redox potential ORP, the situation that occurs long period fluctuation or rising as redox potential ORP, feed back to sequence controller to this pond water inlet or increasing flooding quantity, organic reinforced phosphor-removing denitrifying effect is provided; Carry out nitrated, when inhaling phosphorus and organic matter degradation function, gather dissolved oxygen DO signal, dissolved oxygen DO is maintained more than the 4mg/L, the dissolved oxygen DO concentration of keeping when temperature is hanged down should increase.
The present invention utilizes five biochemical reaction tanks (case) and the integrated pond body that settling tank is formed, by alternately changing of water entry position, automatic backflow and the part mud of realizing mixed solution reflux, the settling tank that is specifically designed to mud-water separation is set simultaneously, refluxes a small amount of mud (about 25%) to water-in from settling tank; The process cycle operation.The advancing successively and the conversion of stirring and aeration state of a control of each pond, spatially experience anoxic, anaerobism, aerobic environment by water inlet; Each reaction tank also all passed through the conversion of anoxic, anaerobism, good oxygen condition respectively in one-period, thereby also experienced the replacement of anoxic, anaerobism, aerobic environment on the flooding time.Technology can the realization time control and control is in real time joined and control mode, can realize intellectuality in conjunction with automation design to technology controlling and process.
Beneficial effect: the present invention has following characteristics:
(1) this technology replaces with spatial in time by each reaction tank anaerobic/anoxic oxygen condition of becoming reconciled, and makes solid flooding all experience anoxic, anaerobism, aerobic environment; Create more strict denitrification simultaneously, released phosphorus and nitrated environment, dephosphorization removing nitric efficiency height.
(2) the mixed-liquor return device is not set specially,, by the switching of water-in and water-out position water (flow) direction is changed and finish mixed-liquor return automatically in symmetric two semi-periods; Return sludge ratio is little, and power consumption is few.
(3) technology can the realization time control and control is in real time joined and control mode, utilize redox potential (ORP) and dissolved oxygen (DO) signal detection and time variable control can realize intellectuality, coordinate denitrification effectively and release the demand of phosphorus the organic matter in the water inlet to technology controlling and process.
(4) be suitable for the biological sewage treatment that various scales have de-scaling denitrogenation requirement, medium and small scale can realize equipment production.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further specified.
Fig. 1 is the activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots structural representation, comprising pond body 1, agitator 2, water inlet pipe 3, flooding velocity meter 4, entering water electromagnetic valve 5, inlet pipe 6, gas meter 7, air inlet magnetic valve 8, sludge reflux pump 9, mud return line 10, mud discharge meter 11, rising pipe 12, effluent weir 13, shore pipe 14, mud return flow solenoid valve 15, communicating pipe 16, boring aeration pipe 17, gate valve 18, butterfly valve 19 being arranged, being communicated with valve 20, soil discharging electromagnetic valve 21.
Fig. 2 is an activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots Controlling System synoptic diagram.
Fig. 3 activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots operational process synoptic diagram.
Embodiment
In the activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots of the present invention, the reaction tank body 1 of alternated water intake from multi-spots by five reaction tanks and a settling tank be composed in series closing the circulation be connected; Wherein adopt communicating pipe 16 hydraulic communication between five reaction tanks, communicating pipe staggered arrangement, in case short stream all is provided with boring aeration pipe 17, agitator 2, entering water electromagnetic valve 5, air inlet magnetic valve 8, mud return flow solenoid valve 15 in each reaction tank; A cycle of operation was made up of six stages:
Stage one. sewage enters first pond and second pond, the agitator 2 in first pond, second pond, the 4th pond is opened, (air inlet magnetic valve 8 cut out when agitator 2 was opened in air inlet magnetic valve 8 unlatchings in the 3rd pond and the 5th pond, agitator 2 cut out when air inlet magnetic valve 8 was opened, identical with the next stage), the 4th pond mud return flow solenoid valve 15 is opened, and the mud in the settling tank passes back into the 4th pond by sludge reflux pump 9 by mud return line 10
Stage two. sewage enters first pond and the 3rd pond, the agitator 2 in first pond, the 3rd pond, the 4th pond is opened, the air inlet magnetic valve 8 in second pond and the 5th pond is opened, the 3rd pond mud return flow solenoid valve 15 is opened, mud in the settling tank passes back into the 3rd pond by sludge reflux pump 9 by mud return line 10
Stage three. sewage all enters second pond, the agitator 2 in second pond, the 3rd pond, the 4th pond is opened, and the air inlet magnetic valve 8 in first pond and the 5th pond is opened, and the second pond mud return flow solenoid valve 15 is opened, mud in the settling tank passes back into second pond by sludge reflux pump 9 by mud return line 10
Stage four. sewage enters the 5th pond and the 4th pond, the agitator 2 in second pond, the 4th pond, the 5th pond is opened, the air inlet magnetic valve 8 in first pond and the 3rd pond is opened, the second pond mud return flow solenoid valve 15 is opened, mud in the settling tank passes back into second pond by sludge reflux pump 9 by mud return line 10
Stage five. sewage enters the 5th pond and the 3rd pond, the agitator 2 in second pond, the 3rd pond, the 5th pond is opened, the air inlet magnetic valve 8 in first pond and the 4th pond is opened, the 3rd pond mud return flow solenoid valve 15 is opened, mud in the settling tank passes back into the 3rd pond by sludge reflux pump 9 by mud return line 10
Stage six. sewage all enters the 4th pond, the agitator 2 in second pond, the 3rd pond, the 4th pond is opened, the air inlet magnetic valve 8 in first pond and the 5th pond is opened, and the 4th pond mud return flow solenoid valve 15 is opened, and the mud in the settling tank passes back into the 4th pond by sludge reflux pump 9 by mud return line 10;
Stage one, stage two, stage three constitute the semi-period, and stage four, stage five, stage six constitute other semi-period, and two semi-periods are symmetrical; Water entry replaces in stage one to the stage six and changes, and mud mixed liquid in that two semi-periods commutations are mobile up and down, is realized automatic mixed-liquor return with water (flow) direction, and the mud backflow that only needs to increase about 25% can be satisfied dephosphorization denitrogenation function needs.The different flow direction of semi-period current in pond body 1 shows as respectively in the plane clockwise or counterclockwise, flows to a terminal reaction tank and open with the valve 20 that is communicated with between the settling tank, and upstream first reaction tank is closed with the valve 20 that is communicated with between settling tank.Water inlet in the different ponds, aeration, stirring or mud backflow realize by the unlatching of PLC controller control magnetic valve (also can be motorized valve etc.).
The conversion of alternated water intake from multi-spots and mud backflow point position can make technology satisfy more strict denitrification, release phosphorus and nitrated, suction phosphorus condition.
Control mode is taked time control and with redox potential ORP, dissolved oxygen DO is the control mode that the real-time control of parameter combines, concrete control scheme can be set to: be controlled to be the basis with the time, fixing dissolved oxygen DO respectively in five reaction tanks, the online detection probe of redox potential ORP, when being in denitrification or release the phosphorus function, follow the tracks of the continuous variable signal of redox potential ORP, the situation that occurs long period fluctuation or rising as redox potential ORP, feed back to sequence controller to this pond water inlet or increasing flooding quantity, organic reinforced phosphor-removing denitrifying effect is provided; Carry out nitrated, when inhaling phosphorus and organic matter degradation function, gather dissolved oxygen DO signal, dissolved oxygen DO is maintained more than the 4mg/L, the dissolved oxygen DO concentration of keeping when temperature is hanged down should increase.
Claims (2)
1. activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots, the reaction tank body (1) that it is characterized in that alternated water intake from multi-spots are composed in series by five reaction tanks and a settling tank and close circulation and be connected; Wherein adopt communicating pipe (16) hydraulic communication between five reaction tanks, all be provided with boring aeration pipe (17), agitator (2), entering water electromagnetic valve (5), air inlet magnetic valve (8), mud return flow solenoid valve (15) in each reaction tank; A cycle of operation was made up of six stages:
Stage one. sewage enters first pond and second pond, and mud passes back into the 4th pond,
Stage two. sewage enters first pond and the 3rd pond, and mud passes back into the 3rd pond,
Stage three. sewage all enters second pond, and mud is back to second pond,
Stage four. sewage enters the 5th pond and the 4th pond, and mud passes back into second pond,
Stage five. sewage enters the 5th pond and the 3rd pond, and mud passes back into the 3rd pond,
Stage six. sewage all enters the 4th pond, and mud is back to the 4th pond;
Stage one, stage two, stage three constitute the semi-period, and stage four, stage five, stage six constitute other semi-period, and two semi-periods are symmetrical; Water entry alternately changed in stage one to the stage six, mud mixed liquid flows in two semi-periods commutations up and down with water (flow) direction, realize refluxing automatically, the flow direction of different semi-period current in pond body (1) shows as respectively in the plane clockwise or is counterclockwise, flow to a terminal reaction tank and open with the valve (20) that is communicated with between the settling tank, upstream first reaction tank is closed with the valve (20) that is communicated with between settling tank.
2. alternated water intake from multi-spots activated sludge process dephosphorization denitrification method according to claim 1, it is characterized in that control mode is taked time control and with redox potential, dissolved oxygen is the control mode that the real-time control of parameter combines, concrete control scheme is set to: be controlled to be the basis with the time, fixing dissolved oxygen respectively in five reaction tanks, the online detection probe of redox potential, when being in denitrification or release the phosphorus function, follow the tracks of the continuous variable signal of redox potential, the situation that redox potential the long period fluctuation occurs or rises, feed back to sequence controller to this pond water inlet or increasing flooding quantity, organic reinforced phosphor-removing denitrifying effect is provided; Carry out nitrated, when inhaling phosphorus and organic matter degradation function, gather the dissolved oxygen signal, dissolved oxygen is maintained more than the 4mg/L, the dissolved oxygen concentration of keeping when temperature is low should increase.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101231466A CN1329316C (en) | 2005-12-19 | 2005-12-19 | Activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots |
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| CNB2005101231466A CN1329316C (en) | 2005-12-19 | 2005-12-19 | Activated sludge dephosphorizing and denitrifying method with alternated water intake from multi-spots |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104129842A (en) * | 2013-05-03 | 2014-11-05 | 彭志新 | Single-tank integrated biochemical treatment process for sewage |
| CN105110468B (en) * | 2015-08-27 | 2018-04-10 | 上海市政工程设计研究总院（集团）有限公司 | A kind of method that integral biological reaction tank using multi-mode operation handles sewage |
| CN105110467B (en) * | 2015-08-27 | 2018-03-16 | 上海市政工程设计研究总院（集团）有限公司 | A kind of denitrification and phosphorus removal integration biological reaction pool of multi-mode operation |
| CN111675335A (en) * | 2020-07-01 | 2020-09-18 | 辽宁省生态环境保护科技中心 | Enhanced nitrogen and phosphorus removal domestic sewage treatment device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5772891A (en) * | 1995-08-16 | 1998-06-30 | Sharp Kabushiki Kaisha | Water treating method for treating waste water by using ion exchange resin |
| CN1657443A (en) * | 2004-07-22 | 2005-08-24 | 重庆大学 | Sewage treatment method using active sludge-biological filtering pond revere flow and integral device |
| CN1673120A (en) * | 2005-03-24 | 2005-09-28 | 同济大学 | Biochemical city sewage denitriding and dephosphorizing method in suspension stuffing bed |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5772891A (en) * | 1995-08-16 | 1998-06-30 | Sharp Kabushiki Kaisha | Water treating method for treating waste water by using ion exchange resin |
| CN1657443A (en) * | 2004-07-22 | 2005-08-24 | 重庆大学 | Sewage treatment method using active sludge-biological filtering pond revere flow and integral device |
| CN1673120A (en) * | 2005-03-24 | 2005-09-28 | 同济大学 | Biochemical city sewage denitriding and dephosphorizing method in suspension stuffing bed |
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