CN102001791A - Urban sewage strengthening treatment method in cold area based on multi-point feed water adjustment - Google Patents
Urban sewage strengthening treatment method in cold area based on multi-point feed water adjustment Download PDFInfo
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Abstract
一种基于多点进水调控的寒冷地区城市污水强化处理方法，它涉及一种城市污水强化处理方法。它解决了采用现有处理城市污水的技术存在无法同步高效的脱氮除磷、处理效果差、运行费用高和不适用于处理寒冷地区城市污水的问题。方法：一、污水初步沉淀，通过配水井将初沉池出水分成两部分或三部分进行分配；二、厌氧池和缺氧池1的出水混合液与好氧池首端回流污泥同时进入好氧池，好氧池出水进入缺氧池2，缺氧池2出水经跌水进入二沉池，上清液作为处理的净化水排出，将下层的部分污泥回流，其余作为剩余污泥排放。本发明可同步进行高效的脱氮除磷、处理效果好、运行费用低和适用于处理寒冷地区城市污水。The invention discloses a method for intensified treatment of urban sewage in cold regions based on multi-point water inflow control, which relates to a method for intensified treatment of urban sewage. It solves the problems that existing technologies for treating urban sewage cannot simultaneously and efficiently remove nitrogen and phosphorus, have poor treatment effects, high operating costs and are not suitable for treating urban sewage in cold regions. Method: 1. The sewage is preliminarily settled, and the effluent of the primary sedimentation tank is divided into two or three parts through the water distribution well for distribution; 2. The effluent mixture of the anaerobic tank and the anoxic tank 1 and the return sludge at the head end of the aerobic tank enter at the same time Aerobic pool, the effluent from the aerobic pool enters the anoxic pool 2, and the effluent from the anoxic pool 2 enters the secondary sedimentation tank through falling water, and the supernatant is discharged as treated purified water, and part of the sludge in the lower layer is refluxed, and the rest is used as excess sludge emission. The invention can simultaneously carry out high-efficiency denitrification and dephosphorization, has good treatment effect, low operation cost and is suitable for treating urban sewage in cold regions.
Description
Technical field
The present invention relates to a kind of sewage in urban area treatment process.
Background technology
At present, biological activity mud method is mainly adopted in municipal sewage treatment, and biological activity mud method has a variety of treatment process, and the processing method that often has has, common aeration, A-B method, A/O technology, A
2/ O denitrification dephosphorization technique, oxidation ditch process etc.A
2/ O technology as the simplest synchronous denitrogen dephosphorus technology in system, and is widely used in the domestic and international municipal effluent biological carbon and phosphorous removal sewage work with advantages such as its effect stability, wide adaptabilities.
But this technology coexists as anaerobism, anoxic and aerobic three kinds of different envrionment conditions alternate runs and different types of microorganism species such as polyP bacteria, denitrifying bacteria, nitrifier in the same sludge system, cause two big contradictions, on the one hand, nitrifier, the different mud age of denitrifying bacteria and polyP bacteria and carbon source battle, the nitrate that carries in the returned sluge has also suppressed the release of phosphorus under the anaerobic condition simultaneously, this mutual restriction effect of result, cause the denitrogenation dephosphorizing efficient of this technology to be difficult to further improve, finally cause the contradiction of denitrogenation and dephosphorization opposition; On the other hand, nitrobacteria belongs to aerobic bacteria, is back to the oxygen-starved area through nitrification liquid, its activity is suppressed, the denitrifying bacterium environmental optima is an anaerobic environment, and the process aerobic zone can influence the activity of denitrifying bacterium, takes the photograph the phosphorus bacterium and under anaerobic releases phosphorus, aerobic condition is inhaled phosphorus, but pass through the oxygen-starved area nonsensical to dephosphorization, phosphorus bacterium performance is taken the photograph in influence, and three kinds of bacteriums have the suitableeest separately dissolved oxygen, all can suppress bacterial activity through other zones, influence the denitrogenation dephosphorizing effect.In addition,, be back to the oxygen-starved area by nitrification liquid and carry out denitrification, not only limit the clearance of TN (total nitrogen content), and increased the power working cost because anaerobic/anoxic/aerobic layout forms.
In addition, north cold area municipal effluent temperature is low, cause the interior microorganism active of Sewage treatment systems poor, the denitrogenation dephosphorizing effect is undesirable, therefore how to study a kind of Municipal Wastewater in Cold Region synchronous denitrification dephosphorizing treatment process, overcome the contradiction between the denitrogenation dephosphorizing removal, make cold district sewage reach denitrogenation dephosphorizing and steady running efficiently simultaneously, this is present problem demanding prompt solution.
Summary of the invention
The present invention seeks to for solve the technology that adopts existing Treating Municipal Sewage exist can't synchronous high-efficiency denitrogenation dephosphorizing, poor processing effect, working cost high and be not suitable for the problem of Treatment of Municipal Wastewater in Cold Region, and a kind of Municipal Wastewater in Cold Region enhanced processing method that provides based on the multipoint water feeding regulation and control.
Municipal Wastewater in Cold Region enhanced processing method based on the multipoint water feeding regulation and control carries out according to the following steps: one, sewage is carried out preliminary sedimentation, hydraulic detention time is 0.5～1.0h, by distributing well preliminary sedimentation tank water outlet separated into two parts or three parts is distributed then; Two, anaerobic pond and anoxic pond 1 go out water mixed liquid and 30%～50% Aerobic Pond head end returned sluge enters Aerobic Pond simultaneously, hydraulic detention time is 4.0～6.0h, the Aerobic Pond water outlet enters anoxic pond 2, hydraulic detention time is 0.5～1.0h, anoxic pond 2 water outlets enter through drop carries out mud-water separation in the second pond, hydraulic detention time is 2.0～3.0h, dissolved oxygen concentration is 1.3～1.7mg/L, supernatant liquor is as the discharge of handling of purifying waste water, the part mud of lower floor is refluxed, and all the other are as excess sludge discharge;
Wherein preliminary sedimentation tank water outlet separated into two parts distributes (two portions are 100% altogether) in the step 1, promptly (Aerobic Pond water outlet COD is 80～150mg/L) under the competent condition of carbon source, 20%～50% preliminary sedimentation tank water outlet and anaerobism returned sluge enter anaerobic pond simultaneously, hydraulic detention time is 1.0～1.5h, the nitrification liquid that 50%～80% preliminary sedimentation tank water outlet and 100%～300% Aerobic Pond reflux enters anoxic pond 1 simultaneously, and hydraulic detention time is 1.0～1.5h;
The preliminary sedimentation tank water outlet is divided into three parts and distributes (three parts are 100% altogether) in the step 1, promptly (Aerobic Pond water outlet COD is 40～80mg/L) under the insufficient condition of carbon source, 20%～50% preliminary sedimentation tank water outlet and anaerobism returned sluge enter anaerobic pond simultaneously, hydraulic detention time is 1.0～1.5h, the nitrification liquid that 30%～50% preliminary sedimentation tank water outlet and 100%～300% Aerobic Pond reflux enters anoxic pond 1 simultaneously, hydraulic detention time is 1.0～1.5h, 20%～30% preliminary sedimentation tank water outlet and Aerobic Pond go out water mixed liquid and enter anoxic pond 2 jointly, and hydraulic detention time is 0.5～1.0h;
In the step 2 part mud of lower floor being refluxed, is 5%～30% to be back to anaerobic pond, and 30%～50% is back to the Aerobic Pond head end.
Advantage of the present invention: 1, sewage is assigned to anaerobic pond and anoxic pond 1 with certain proportion, increased the residence time of sewage in anaerobic pond and anoxic pond 1, if the residence time of technology is designed routinely, then can reduce the volume of anaerobic pond and anoxic pond 1, save construction cost;
2, sewage is assigned to anaerobic pond and anoxic pond 1 with certain proportion, efficiently solves carbon source contradiction in the common process, make the anaerobism section release carbon source abundance in phosphorus process and the anoxic section denitrification process, improve the denitrogenation dephosphorizing effect; The mud that is back to anaerobic pond reflux to adopt 5%～30% than low reflux ratio, can reach the purpose of dephosphorization; The mud that is back to the Aerobic Pond head end refluxes and adopts 30%～50%, and nitrification liquid refluxes and adopts 100%～300%, can reach good denitrogenation;
3, sewage is assigned to anaerobic pond and anoxic pond 1 with certain proportion, efficiently solves the contradiction of sludge age in the common process, can be fit to the different mud age of denitrogenation and dephosphorization, improve the denitrogenation dephosphorizing effect by the water distribution ratio control;
4, increased the return-flow system that is back to the Aerobic Pond head end from second pond mud, reduced the residence time of nitrobacteria under the low dissolved axygen environment, make nitrobacteria promptly be back to Aerobic Pond without anaerobism and anoxic process, guaranteed the aerobic condition of nitrobacteria, cultivated the obligate nitrobacteria, keep the high-effect of nitrobacteria, improved the nitrification effect of Aerobic Pond;
5, behind Aerobic Pond, establish an anoxic pond 2, can further carry out denitrification, solved the problem of utilizing nitrification liquid backflow carrying out denitrification restricted T N clearance, reduce nitrate concentration, improve the TN clearance;
6, establish an anoxic pond 2 behind Aerobic Pond, reduce nitrate concentration, the nitrate that the backflow of minimizing anaerobic sludge is carried improves the removal effect of phosphorus to the influence of anaerobic phosphorus release;
7, behind Aerobic Pond, establish an anoxic pond 2, further carry out denitrification, can reduce the nitrification liquid reflux ratio of Aerobic Pond, can guarantee denitrogenation, can reduce the power working cost again to anoxic pond 1;
8, set up filler in anoxic pond, fixedly denitrifying bacterium makes denitrifying bacterium be in anoxia condition, is not subjected to the influence of dissolved oxygen, can increase denitrifying bacterium quantity and denitrification effect;
9, set up filler at Aerobic Pond, be used for fixing microorganism, form the compound worker's technology of microbial film-active sludge, biomass in the increase system improves the denitrogenation dephosphorizing effect;
10, establish the partition wall classification in the Aerobic Pond, the perforate of neighboring walls subtend makes it to form the plug-flow processing form, makes the mixed solution uniform mixing that fluctuates up and down, increases treatment effect.
11, present method adopts reinforcing mass transfer, adds the built-up type fibrous packing, increases and throw measures such as the mud backflow reinforcement biological treatment of second pond to the Aerobic Pond head end, effectively improve the Municipal Wastewater in Cold Region treatment effect, steady running, the problem of solution low-temperature sewage synchronous denitrification dephosphorizing weak effect.
Description of drawings
Fig. 1 is based on the technological principle synoptic diagram of the intensive treatment of the Municipal Wastewater in Cold Region of multipoint water feeding regulation and control in the embodiment one.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: in conjunction with shown in Figure 1, present embodiment is carried out according to the following steps based on the Municipal Wastewater in Cold Region enhanced processing method of multipoint water feeding regulation and control: one, sewage is carried out preliminary sedimentation, hydraulic detention time is 0.5～1.0h, by distributing well preliminary sedimentation tank water outlet separated into two parts or three parts is distributed then; Two, anaerobic pond and anoxic pond 1 go out water mixed liquid and 30%～50% Aerobic Pond head end returned sluge enters Aerobic Pond simultaneously, hydraulic detention time is 4.0～6.0h, the Aerobic Pond water outlet enters anoxic pond 2, hydraulic detention time is 0.5～1.0h, anoxic pond 2 water outlets enter through drop carries out mud-water separation in the second pond, hydraulic detention time is 2.0～3.0h, dissolved oxygen concentration is 1.3～1.7mg/L, supernatant liquor is as the discharge of handling of purifying waste water, the part mud of lower floor is refluxed, and all the other are as excess sludge discharge;
Wherein preliminary sedimentation tank water outlet separated into two parts distributes (two portions are 100% altogether) in the step 1, promptly (Aerobic Pond water outlet COD is 80～150mg/L) under the competent condition of carbon source, 20%～50% preliminary sedimentation tank water outlet and anaerobism returned sluge enter anaerobic pond simultaneously, hydraulic detention time is 1.0～1.5h, the nitrification liquid that 50%～80% preliminary sedimentation tank water outlet and 100%～300% Aerobic Pond reflux enters anoxic pond 1 simultaneously, and hydraulic detention time is 1.0～1.5h;
The preliminary sedimentation tank water outlet is divided into three parts and distributes (three parts are 100% altogether) in the step 1, promptly (Aerobic Pond water outlet COD is 40～80mg/L) under the insufficient condition of carbon source, 20%～50% preliminary sedimentation tank water outlet and anaerobism returned sluge enter anaerobic pond simultaneously, hydraulic detention time is 1.0～1.5h, the nitrification liquid that 30%～50% preliminary sedimentation tank water outlet and 100%～300% Aerobic Pond reflux enters anoxic pond 1 simultaneously, hydraulic detention time is 1.0～1.5h, 20%～30% preliminary sedimentation tank water outlet and Aerobic Pond go out water mixed liquid and enter anoxic pond 2 jointly, and hydraulic detention time is 0.5～1.0h;
In the step 2 part mud of lower floor being refluxed, is 5%～30% to be back to anaerobic pond, and 30%～50% is back to the Aerobic Pond head end.
Carrying out preliminary sedimentation in the present embodiment step 1 is in order to remove large granular impurity.
Preliminary sedimentation tank water outlet separated into two parts or three parts are distributed in the present embodiment step 1, it is to carry out anaerobic phosphorus release that preliminary sedimentation tank water outlet and anaerobism returned sluge enter anaerobic pond simultaneously, it is to become nitrogen to discharge the nitrate denitrification that the preliminary sedimentation tank water outlet enters anoxic pond 1 simultaneously with the nitrification liquid that Aerobic Pond refluxes, preliminary sedimentation tank water outlet and Aerobic Pond go out water mixed liquid and enter anoxic pond 2 jointly, can make anoxic pond 2 have sufficient nutritive substance further to carry out denitrification.
Dissolved oxygen concentration is 1.3～1.7mg/L in the present embodiment step 2, can prevent anaerobic phosphorus release.
The BOD sludge loading is 0.1～0.2kgBOD5/kgMLSS.d in the present embodiment.
Adopt multiple spot cycle control mode in the present embodiment, the nitrification liquid that promptly removes the Aerobic Pond backflow enters anoxic pond 1, second pond mud is except that some is back to anaerobic pond, some is back to the Aerobic Pond head end, wherein the second pond mud that is back to anaerobism and Aerobic Pond head end can adopt same set of reflux, enter two return lines, promptly amount to two cover return-flow systems, three cover backflow pipelines.
Present embodiment is process object with the municipal effluent, mainly removes organism, nitrogen and phosphorus.
Embodiment two: what present embodiment and embodiment one were different is that sewage carries out preliminary sedimentation in the step 1, and hydraulic detention time is 0.6～0.9h.Other step and parameter are identical with embodiment one.
Embodiment three: what present embodiment and embodiment one were different is that sewage carries out preliminary sedimentation in the step 1, and hydraulic detention time is 0.8h.Other step and parameter are identical with embodiment one.
Embodiment four: present embodiment is different with one of embodiment one to three be in the step 2 anaerobic pond and anoxic pond 1 go out water mixed liquid and 35%～45% Aerobic Pond head end returned sluge enters Aerobic Pond simultaneously, hydraulic detention time is 4.5～5.5h, the Aerobic Pond water outlet enters anoxic pond 2, hydraulic detention time is 0.6～0.9h, anoxic pond 2 water outlets enter through drop carries out mud-water separation in the second pond, hydraulic detention time is 2.2～2.8h, and guarantor's dissolved oxygen is 1.4～1.6mg/L.Other step and parameter are identical with one of embodiment one to three.
Embodiment five: present embodiment is different with one of embodiment one to three be in the step 2 anaerobic pond and anoxic pond 1 go out water mixed liquid and 40% Aerobic Pond head end returned sluge enters Aerobic Pond simultaneously, hydraulic detention time is 5.0h, the Aerobic Pond water outlet enters anoxic pond 2, hydraulic detention time is 0.8h, anoxic pond 2 water outlets enter through drop carries out mud-water separation in the second pond, hydraulic detention time is 2.5h, and guarantor's dissolved oxygen is 1.5mg/L.Other step and parameter are identical with one of embodiment one to three.
Embodiment six: present embodiment is different with one of embodiment one to five is that anoxic pond 1 and anoxic pond 2 are set up the built-up type fibrous packing in the step 2, form by soft fiber bundle, high molecular polymerization plastics ring plate and axial cord, the carrier profile is circular, outside diameter is 80mm, thick 3mm.Other step and parameter are identical with one of embodiment one to five.
Set up filler in the present embodiment, fixedly denitrifying bacterium makes denitrifying bacterium be in anoxia condition, is not subjected to the influence of dissolved oxygen, can increase denitrifying bacterium quantity and nitrification effect.
Embodiment seven: what present embodiment was different with one of embodiment one to six is to increase throwing built-up type fibrous packing at Aerobic Pond in the step 2, form by soft fiber bundle, high molecular polymerization plastics ring plate and axial cord, the carrier profile is circular, and outside diameter is 80mm, thick 3mm.Its step and parameter are identical with one of embodiment one to six.
Set up filler in the present embodiment, but fixation of microbe forms microbial film-active sludge recombining process, the denitrogenation dephosphorizing effect of consolidation system.
Embodiment eight: what present embodiment was different with one of embodiment one to seven is that anaerobic pond adopts the stirring of alr mode mixing under water in the step 2; Anoxic pond 1 and anoxic pond 2 adopt and stir under water and weak aeration mode; Aerobic Pond is provided with aerating apparatus, and Aerobic Pond establishes the partition wall classification, makes it to form the plug-flow processing form, makes the mixed solution uniform mixing that fluctuates up and down.Its step and parameter are identical with one of embodiment one to seven.
Present embodiment makes sewage be in turbulent motion in total system in order to the mass transfer process of enhanced sewage, control Re 〉=1200, or adopt whipping appts, control power of agitator 〉=0.5W/m
3
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102557342A (en) * | 2011-12-28 | 2012-07-11 | 广州市市政工程设计研究院 | Process and device for treating sewage through denitrification and dephosphorization by anaerobic-anoxic-oxic-anoxic (AAOA) plus membrane bioreactor (MBR) process |
| CN103253768A (en) * | 2013-04-11 | 2013-08-21 | 李思敏 | Multi-point water feeding town sewage treatment system and treatment method thereof |
| CN105084672A (en) * | 2015-08-22 | 2015-11-25 | 哈尔滨金大环境工程有限公司 | Sectional-water-inlet A/O (anoxic/oxic) composite sewage treatment plant and sewage treatment method |
| CN106315969A (en) * | 2015-06-25 | 2017-01-11 | 麦王环境技术股份有限公司 | Integrated wastewater treatment equipment of IBR (integral biological reactor) and treatment process |
| CN111217447A (en) * | 2019-11-29 | 2020-06-02 | 段林卓 | Process and device for treating sewage of outdoor flush toilet in alpine region |
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| CN101012093A (en) * | 2007-01-22 | 2007-08-08 | 华中科技大学 | Integral synchronous denitrification dephosphorizing bioreactor |
| CN101041533A (en) * | 2007-02-28 | 2007-09-26 | 沈阳化工学院 | Denitrogenation dephosphorizing technique for integral sewage treatment |
| CN101811801A (en) * | 2010-04-02 | 2010-08-25 | 江苏江华水处理设备有限公司 | Direct-flow biological nitrogen removal sewage treatment method |
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| CN101012093A (en) * | 2007-01-22 | 2007-08-08 | 华中科技大学 | Integral synchronous denitrification dephosphorizing bioreactor |
| CN101041533A (en) * | 2007-02-28 | 2007-09-26 | 沈阳化工学院 | Denitrogenation dephosphorizing technique for integral sewage treatment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557342A (en) * | 2011-12-28 | 2012-07-11 | 广州市市政工程设计研究院 | Process and device for treating sewage through denitrification and dephosphorization by anaerobic-anoxic-oxic-anoxic (AAOA) plus membrane bioreactor (MBR) process |
| CN103253768A (en) * | 2013-04-11 | 2013-08-21 | 李思敏 | Multi-point water feeding town sewage treatment system and treatment method thereof |
| CN106315969A (en) * | 2015-06-25 | 2017-01-11 | 麦王环境技术股份有限公司 | Integrated wastewater treatment equipment of IBR (integral biological reactor) and treatment process |
| CN105084672A (en) * | 2015-08-22 | 2015-11-25 | 哈尔滨金大环境工程有限公司 | Sectional-water-inlet A/O (anoxic/oxic) composite sewage treatment plant and sewage treatment method |
| CN105084672B (en) * | 2015-08-22 | 2017-09-22 | 哈尔滨金大环境工程有限公司 | Subsection water inflow A/O composite sewage treatment equipments and sewage water treatment method |
| CN111217447A (en) * | 2019-11-29 | 2020-06-02 | 段林卓 | Process and device for treating sewage of outdoor flush toilet in alpine region |
| CN111217447B (en) * | 2019-11-29 | 2022-06-03 | 段林卓 | Process and device for treating sewage of outdoor flush toilet in alpine region |
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