CN101928096A - Sewage treatment method and system in ecological sensitive areas - Google Patents

Sewage treatment method and system in ecological sensitive areas Download PDF

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CN101928096A
CN101928096A CN 200910243577 CN200910243577A CN101928096A CN 101928096 A CN101928096 A CN 101928096A CN 200910243577 CN200910243577 CN 200910243577 CN 200910243577 A CN200910243577 A CN 200910243577A CN 101928096 A CN101928096 A CN 101928096A
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tank
water
membrane
sewage
system
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CN101928096B (en )
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付宏祥
汪诚文
王欣
赵雪峰
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清华大学
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Abstract

The invention discloses a sewage treatment method and a system in ecological sensitive areas. The method comprises the following steps: larger suspended matters in sewage are removed by using a collecting well the inlet of which is provided with a mechanical coarse screen, the treated sewage enters a pretreatment tank, the suspended matters are further removed by the coarse screen, animal and vegetable oils and mineral oils are removed by an oil separator, and the retreated sewage enters a regulating reservoir to equalize the water quantity and water quality; the pretreated sewage enters an anaerobic tank to be mixed with backflow mixed liquor from an anoxic tank; effluent from the anaerobic tank and the backflow mixed liquor from a membrane pool are mixed to enter the anoxic tank, and effluent from the anoxic tank enters an aerobic tank; effluent from the aerobic tank enters the membrane pool to be biodegraded; and the effluent is filtered by membranes. By adopting an anaerobic-anoxic-aerobic-MBR mode, the invention has higher treatment efficiency and stability and can effectively remove COD, BOD, TN, TP and oils in the sewage; and the effluent meets first grade A emission requirements, and can be used as a reuse water source, thereby protecting the environment and saving the water resources. The invention is especially suitable for treating rural domestic sewage and catering wastewater in the ecological sensitive areas.

Description

生态敏感区污水处理方法及系统 Wastewater treatment method and system for ecological sensitive area

技术领域 FIELD

[0001] 本发明涉及一种用于生态敏感区的生活污水与餐饮废水处理的一体化MBR(Membrane Bioreactor,膜生物反应器)处理方法及系统。 [0001] The present invention relates to food waste and sewage treatment for an ecologically sensitive areas integrated MBR (Membrane Bioreactor, MBR) processing method and system.

背景技术 Background technique

[0002] 生态敏感区是指沙尘暴源区、荒漠中的绿洲、严重缺水地区、珍稀动植物栖息地或特殊生态系统、天然林、热带雨林、红树林、珊瑚礁、鱼虾产卵场、重要湿地和天然渔场等。 [0002] ecologically sensitive area is the source of dust storms, desert oasis, a serious water shortage areas, habitats of rare or special ecosystems, natural forests, tropical rain forests, mangrove forests, coral reefs, fish spawning grounds, important wetlands and natural fishing grounds. 生态敏感区水资源珍贵,用以维持特殊物种的生存。 Precious water resources in ecologically sensitive areas, to maintain the survival of particular species. 在这些区域,对排放污水的水质要求高或者要求零排放,而且水资源紧张,污水再生回应用的需求明显。 In these areas, water quality requirements for discharge of sewage or high zero-emission requirements, and shortage of water resources, wastewater reclamation and clear back to the application requirements. 因此防止污水对排放水资源的污染在保护生态敏感区的工程中尤为重要。 Therefore, to prevent sewage pollution of water resources is especially important in engineering protection of ecologically sensitive area.

[0003] 在这些区域中,除国家重点保护区等一些强制性禁止住人的地区外,往往以村落为单位居住着我国部分农民,而我国的农村排污体制还不健全,除部分经济发达地区的农村建设了污水处理设备外,大部分地区的农村都没有有效的污水处理设施,而是直接排放到周围的水系中。 [0003] In these regions, with the exception of some areas of mandatory national key protected areas prohibited to live, often to our village units inhabited by some farmers, while China's rural sewage system is not perfect, except for some economically developed areas construction of sewage treatment facilities in rural areas, the rural areas are not most effective sewage treatment facilities, but directly discharged into the surrounding water. 农村生活污水中含有大量的有机物及N、P等元素,排入水体会引起水体中叶绿素a的含量呈现出数量级的上升,导致水体中的藻类大量繁殖,引发富营养化现象, 造成受纳水体的水质恶化,严重影响生态敏感地区的生态环境。 Rural domestic wastewater contains large amounts of organic matter and N, P and other elements, caused by water discharged into water experience chlorophyll content showed a rise in orders of magnitude, resulting in a body of water algal blooms caused by eutrophication, causing the receiving water body the deterioration of water quality, seriously affecting the ecological environment ecologically sensitive areas. 随着市场经济的不断发展与深入,很多农村地区根据敏感生态区域优越的地理生态环境特点,发展了旅游业,开发了农家乐、度假区等形式的娱乐设施。 As the economy continues to develop and market depth, many rural areas based on sensitive ecological areas favorable geographical characteristics of the ecological environment, the development of tourism, the development of a form of joy, resorts and other entertainment facilities. 在提高整个农村的经济发展水平的同时,餐饮废水的增加更加快了生态敏感地区的环境污染。 Improving the level of economic development of the rural areas at the same time, increasing the wastewater catering more to speed up the environmental pollution ecologically sensitive areas. 因此,加强生态敏感区域周边农村的生活污水的治理工作刻不容缓。 Therefore, strengthening the governance of rural eco-sensitive area around the sewage without delay.

[0004] 我国农村污水治理工作尚属起步阶段。 [0004] China's rural sewage treatment work has just begun. 由于传统大范围城镇式污水收集后集中处理模式不能普遍推广到农村,尤其对于处于生态敏感的农村地区,对排水水质要求高,而且水资源紧张,污水再生回用需求明显。 Due to the wide range of traditional centralized treatment of urban sewage collection mode can not be universally extended to rural areas, especially for rural areas in an ecologically sensitive, high quality requirements for drainage and shortage of water resources, wastewater reuse demand significantly. 因此可以采取一定区域范围内收集,建设分散式污水处理站实现污水处理后达标排放或回用。 Can be taken to collect a certain area, the construction of sewage treatment station decentralized sewage treatment discharge standards or reuse.

[0005] 目前农村污水分散治理主要采用人工湿地处理系统、接触氧化工艺、生物滤池、 SBR(Sequencing Batch Reactor Activated Sludge,序批式活性污泥法)等工艺。 [0005] It sewage treatment dispersed rural main artificial wetland treatment system, a contact oxidation process, biological filter, SBR (Sequencing Batch Reactor Activated Sludge, sequencing batch reactor method) process. 人工湿地尽管具有良好的景观效果,但是也存在很多缺点:其建设占用耗费了大量的土地面积,这对于我国土地资源匮乏的国情有着不可忽视的影响;人工湿地建设的开挖量大,对环境的影响较大,尤其是对工程建设区域的复耕具有非常重大而长远的影响;人工湿地的管理体制不完善,以至于人工湿地在建成后很多都成为了当地政府的一个累赘。 Wetland despite good visual effects, but there are many disadvantages: its building occupancy cost a lot of land area, which have a negligible impact for the lack of land resources conditions; excavation of large wetland construction, environmental the greater impact, especially with a very significant and long-term impact on the area of ​​rehabilitation construction project; wetland management system is imperfect, that constructed wetlands after the completion of many have become a burden to local governments. 接触氧化工艺对水质有较高的容积负荷,对水质水量变化有较好的适应能力,同时污泥产生量较少,缺点是池内填料间的生物膜有时会出现堵塞现象,后续管理不方便,在农村地区基本无专业的从事污水治理的管理人员,则无法进行相关问题的处理,最终导致污水处理不达标的现象发生。 Contact oxidation process for higher quality volume load, better adaptability to changes in water quality, with a less amount of sludge, biofilm disadvantage pool between the filler clogging sometimes inconvenient subsequent management, in rural areas, almost no professional managers engaged in sewage treatment, you can not deal with related issues, ultimately leading to sewage treatment is not up to the phenomenon. 生物滤池处理效果好,运行稳定,易于管理,节省能源,但是占地面积大,滤料容易堵塞, 容易产生臭味和滤池蝇,恶化环境卫生。 Biofilter treatment effect is good, stable, easy to manage, save energy, but an area of ​​large, easy to plug the filter, easy to produce odor and filter flies, worsening sanitation. SBR适用于分散处理污水,其工艺流程简单、处理效果稳定、占地面积小、耐冲击负荷强及具有脱氮除磷能力等优点,但是在农村这种没有较高环保意识的地区,对反应器的开启运行,农民往往不够在意,也影响最终的污水处理效果。 SBR is suitable for decentralized wastewater treatment, its process is simple, stable treatment effect, small footprint, strong resistance to shock loading and has the advantage of nitrogen and phosphorus removal capacity, but not such a high environmental awareness in the rural areas, the reaction open runner, and farmers often inadequate care, but also affect the final sewage treatment effect.

[0006] 现有的MBR处理系统主要针对城镇污水的处理,鉴于城镇污水与农村污水特征有明显的不同,利用相关的设计运行数据来指导农村污水处理系统建设往往是不合理的,需要调研分析农村排水的地域特点、收集方式与污水水量与水质变化等情况,得出结合农村生活习惯的基础数据,最终确定处理系统的参数设计。 [0006] the existing MBR system mainly for urban sewage treatment, urban sewage and wastewater characteristics in view of the countryside are significantly different, use of relevant data to guide the design and operation of the sewage treatment system construction in rural areas tend to be irrational, we need research and analysis the geographical situation of the characteristics of rural drainage, sewage collection methods and the quantity and quality changes, combined with basic data obtained rural lifestyle, and ultimately determine the parameters of the system design process. 我国目前还没有结合生态敏感地域农村污水的处理特点的一体化MBR处理系统的设计参数以及运行参数。 Design parameters and operating parameters of the integrated MBR treatment system in our country has not yet combined processing characteristics of the ecologically sensitive area of ​​rural sewage. 在这些区域,农村污水处理后排放标准严格,或不允许有污水排放,要求污水处理系统运行稳定,因此,研究MBR单项处理技术用于农村污水处理的相关参数,能够保证这些环境敏感区域的污水处理效果。 In these areas, the rural sewage treatment discharge standards strictly, or does not allow sewage discharge, requiring sewage treatment system is stable, therefore, study MBR individual processing parameters for wastewater treatment in rural areas, to ensure that these environmentally sensitive areas of sewage treatment effect. 另外,在我国东部经济发达地区的农村,可以推广MBR污水处理技术,进行小型化、分散式、庭院污水处理。 In addition, in the rural economy of the eastern developed areas, it can be extended MBR wastewater treatment technology, miniaturization, decentralized, yard waste water treatment.

发明内容 SUMMARY

[0007] 本发明的目的是针对现有技术中存在的缺陷和不足,提供一种主要用于处理生态敏感区的生活污水的系统。 Objective [0007] The present invention is directed to the prior art shortcomings and deficiencies, there is provided a process for the main ecologically sensitive areas of the sewage system.

[0008] 为达到上述目的,本发明提供了一种生态敏感区污水处理方法,包括步骤: [0008] To achieve the above object, the present invention provides a wastewater treatment method of ecologically sensitive areas, comprising the steps of:

[0009] Si,预处理:使用入口设置有机械粗格栅的集水井去除污水中较大的悬浮物,之后污水进入预处理池,设置在预处理池入口的粗格栅用来进一步去除污水中的悬浮物,然后采用隔油池去除污水中的浮油和重油,最后污水进入调节池进行处理; [0009] Si, Pretreatment: the inlet is provided the use of a mechanical removal of the coarse grid sump large sewage suspension, after the sewage into the pretreatment tank, disposed in the pretreatment of the coarse grid cell inlet to further remove water the suspension was then removed using the grease trap and wastewater heavy oil slick, and finally into the conditioning tank for sewage treatment;

[0010] S2,生物处理及污泥处理:预处理后的污水进入厌氧池,在厌氧池中同来自缺氧池的回流混合液混合;厌氧池出水与来自膜池的回流混合液混合进入缺氧池;缺氧池出水进入好氧池,以同时实现混合液与污泥回流;好氧池出水进入膜池,在膜池的负压条件下完成过滤处理。 [0010] S2, and biological treatment sludge treatment: after pretreatment of sewage into the anaerobic tank, the mixture was refluxed from the anoxic mix with the anaerobic tank; anaerobic tank effluent and the mixture was refluxed from the membrane cell mixed into the anoxic tank; anoxic effluent into the aerobic tank, the sludge mixture to simultaneously achieve reflux; aerobic tank effluent into the cell membrane, the filtering process is completed in a membrane cell under negative pressure.

[0011] 其中,污水在集水井中的停留时间为1〜2小时。 [0011] wherein the residence time of water in the sump for ~ 2 hours.

[0012] 其中,所述机械粗格栅的栅条间距为20mm ;所述粗格栅的栅条间距为5mm ;在调节池和厌氧池之间设置细格栅,其栅条间距为0. 5mm。 [0012] wherein said mechanical gridlines coarse grid spacing 20mm; the coarse grid spacing of gridlines 5mm; fine grid disposed between the conditioning tank and the anaerobic tank, which spacing is 0 grate. 5mm.

[0013] 其中,污水在隔油池中的停留时间为2〜4小时,且隔油池内设置带式撇油器。 [0013] wherein the residence time of water in the grease trap is 2 ~ 4 hours, and is provided with a skimmer grease traps.

[0014] 其中,污水在调节池中的停留时间为8〜16小时,且在调节池内设置搅拌机或在其底部布置穿孔管用于曝气。 [0014] wherein the residence time of water in the pool is adjusted to 8~16 hours, and in the regulation of pool or agitator disposed at the bottom thereof is disposed a perforated aeration tube is used.

[0015] 其中,污水在厌氧池中的处理时间为2〜4小时;在缺氧池中的处理时间为2〜4 小时;在好氧池中的处理时间为3〜5小时,泥龄为15-25d ;在好氧池内设置微孔曝气头, 以便向好氧池供氧,微孔曝气头孔径为<2 215,好氧池内的气水比为8 : 1。 [0015] wherein the anaerobic tank sewage treatment time is 2 ~ 4 hours; in the anoxic treatment time is 2 ~ 4 hours; treatment time in the aerobic tank for 3 to 5 hours, SRT It is 15-25d; microporous aeration head disposed aerobic pool to oxygen to the aerobic tank, a pore size of porous aeration head <2215, the gas-water ratio of aerobic tanks 8: 1.

[0016] 其中,所述膜池为膜生物反应器,污水在所述膜生物反应器中的处理时间为3〜5 小时,其中的污泥浓度为2000〜5000mg/L、气水比为20〜30 : 1、混合液回流比为500〜 150% ;膜生物反应器的自吸泵运行时间为运行13min,停止2min,其鼓风机的切换时间为8 小时、膜通量为10〜20L/m2h。 [0016] wherein the membrane is a cell membrane bioreactor, the waste water in the membrane bioreactor process time was 3 to 5 hours, wherein the concentration of sludge 2000~5000mg / L, air-water ratio was 20 ~ 30: 1, the mixture was refluxed ratio 500~ 150%; priming pump membrane bioreactor run time of 13min run, stop 2min, which blower switching time of 8 hours, the membrane flux is 10~20L / m2h .

[0017] 本发明还提供了一种生态敏感区污水处理系统,包括:依次连接的集水井、预处理池、厌氧池、缺氧池、好氧池和膜池,从集水井来的污水经过预处理池处理之后调节池,然后进入厌氧池,在厌氧池中污水同来自缺氧池的回流混合液相混合;厌氧池出水与来自膜池的回流混合液混合进入缺氧池;缺氧池出水进入好氧池;好氧池出水进入膜池,在膜池中[0018] 其中,还包括机械粗格栅,其位于所述集水井的入口处;还包括粗格栅,其位于所述预处理池的入口处;还包括细格栅,其位于所述调节池和厌氧池之间。 [0017] The present invention further provides an ecologically sensitive areas wastewater treatment system, comprising: a set of sequentially connected well, pretreatment tank, anaerobic tank, anoxic, aerobic tank and the membrane tank to waste water from the sump after pooling pre-adjusted pool, and then into the anaerobic tank, is mixed with the reflux of the mixture from the anoxic tank in anaerobic wastewater; anaerobic tank effluent and the mixture was refluxed from the membrane into the anoxic mix tank ; anoxic effluent into the aerobic tank; aerobic tank effluent into the cell membrane, the cell membrane [0018], further comprising a mechanical coarse grid, which is located at the entrance of the sump; further comprising a coarse grid, the inlet of the pre-positioned pool; further comprises a fine grid, located between the reservoir tank and anaerobic regulation.

[0019] 其中,所述膜池为膜生物反应器MBR,其包括膜组件、穿孔曝气管、出水系统、反洗系统、清洗系统、吹扫系统以及吊装系统,所述膜组件位于所述穿孔曝气管正上方,所述吹扫系统设置在所述膜组件的下方。 [0019] wherein the membrane is a membrane cell the MBR bioreactor, which comprises a membrane, a perforated aeration tube, the water system, backwash system, cleaning system, and the system was purged hoisting system, said membrane located directly above the perforated aeration tube, said purge system is disposed below the membrane module.

[0020] 其中,该系统还包括可编程逻辑控制器系统,其用于调节污水在调节池中的停留时间、调节设置于调节池和厌氧池之间的提升泵的流量,并调节分别设置于好氧池和膜池内的风机的运行时间与风量。 [0020] wherein the system further comprises a programmable logic controller system for regulating the residence time of water in the conditioning tank, to regulate the flow regulator is provided between the tank and the pump lift anaerobic tank, and are disposed to adjust the aerobic tank and fan run times pool film and air volume.

[0021] 其中,所述调节池内设置用于监测水位的在线液位计。 [0021] wherein the adjustment is provided for monitoring the level of the pool level gauge line.

[0022] 该系统的特点包括: [0022] Features of the system include:

[0023] 1)本发明的系统主要用于农村污水与餐饮废水处理,能够满足对污水中C0D, BOD, TN, TP以及油类的高效去除,出水满足一级A排放要求的同时,也可回用水源,同时达到环境保护与节约水资源的目标; [0023] 1) system of the present invention is mainly used in rural sewage and wastewater treatment food, to meet the efficient removal of sewage C0D, BOD, TN, TP and oils, and water to meet emission requirements while one A, may be reuse of water, while achieving the goal of environmental protection and conservation of water resources;

[0024] 2)采用从膜池回流混合液,同时实现混合液与污泥回流,减少污泥回流环节,使得系统更易操作控制,并减少了污泥回流泵,减少投资与运行费用; [0024] 2) The mixture was refluxed from the membrane cell, sludge and the mixture was refluxed while achieving reduced sludge links, making the system easier to operate the control, and reduces the sludge return pump, to reduce the investment and operating costs;

[0025] 3)针对农村污水以及餐饮废水水量波动大的特点,采用了优化的控制系统,在调节池设置在线液位计,监测调节池水位并通过PLC (Programmable Logic Control,可编程逻辑控制器)系统调节污水置于调节池内的时间与提升泵流量、调节好氧池与膜池内风机的运行时间与风量,实现系统运行参数以及系统能耗随水量日变化以及淡旺季节变化而调节,在保证处理效果基础上达到节能降耗; [0025] 3) for large rural waste water sewage and food volatility characteristics, using an optimized control system to regulate the cell line gauge is provided, and monitoring and adjusting the pool water through PLC (Programmable Logic Control, a programmable logic controller ) system regulates sewage tanks placed in regulating the flow of time and lift pump, adjust the aerobic tank and membrane pool fan running time and air volume to achieve system operating parameters and energy consumption with daily water changes and changes in seasonal adjustment festival, in guaranteed to achieve energy saving effect based on the processing;

[0026] 4)采用合理的预处理,如多级细格栅与精细格栅,以及优化的运行条件,如组合式曝气、气体吹扫与优化的曝气量,间歇出水等实现膜在生物反应池中通过曝气与间歇出水等的自清洁,从而减轻膜在运行中的污染程度,减少膜清洗频率,保证膜系统水通量,延长膜使用寿命,降低运行费用。 [0026] 4) using reasonable pretreatment, such as multi-level fine grid and a fine grid, and optimization of operating conditions, such as a combined aeration, gas purging and optimization of aeration volume, etc. to achieve intermittent water film aeration tank bioreactor with intermittent self-cleaning water or the like, thereby reducing the degree of pollution of the membrane in operation, to reduce the frequency of cleaning the membrane, the water flux of the membrane system to ensure, extended membrane life and reduce operating costs.

[0027] 5)处理系统采用合理高程设计,尽可能利用重力流,减少污水提升,大部分处理设施可置于地下,地上可进行绿化,满足景观要求。 [0027] 5) treatment systems employ rational design elevation by gravity flow and minimizing the sewage lifting, most of the processing facility may be set in the ground, the ground may be green, to meet the requirements of the landscape. 而且系统设施均便于维护。 And the system facilities are easy to maintain.

[0028] 6)膜区设置MBR膜组件系统及配套的出水、反洗、清洗、吹扫、吊装等系统。 [0028] 6) film region is provided MBR membrane module system and the supporting water backwash, washing, purging, hoisting system. 所处膜组件位于所述穿孔曝气管正上方。 Membrane which is located directly above the perforated aeration tube. 膜组件下部设置专用的吹扫系统,吹扫抖动膜元件,以延缓膜元件周边的污泥浓度累积。 A lower membrane systems a dedicated purge, purge jitter membrane element, the membrane element in order to delay the surrounding sludge concentration accumulation.

[0029] 综上,上述技术方案具有如下优点:采用厌氧_缺氧_好氧联用技术,具有较高的处理效率和稳定处理效果,尤其适用于生态敏感区中的农村的生活污水与餐饮废水处理。 [0029] In summary, the above solution has the following advantages: _ anoxic aerobic anaerobic _ associated with technology, has high efficiency and a stable treatment effect, especially for ecologically sensitive areas in rural sewage and restaurant wastewater.

附图说明 BRIEF DESCRIPTION

[0030] 图1是本发明实施例的方法的流程图; [0030] FIG. 1 is a flowchart of an embodiment of the present invention;

[0031] 图2是本发明实施例中MBR反应器的结构示意图。 [0031] FIG. 2 is a schematic structural diagram of an embodiment of the present invention MBR reactor.

具体实施方式 Detailed ways

[0032] 下面结合附图和实施例,对本发明的具体实施方式作进一步详细描述。 [0032] The following embodiments and the accompanying drawings, specific embodiments of the present invention will be further described in detail. 以下实施 The following examples

6例用于说明本发明,但不用来限制本发明的范围。 6 cases for illustrating the present invention but are not intended to limit the scope of the present invention.

[0033] 图1是本发明实施例的方法流程图。 [0033] FIG. 1 is a process flowchart of an embodiment of the present invention. 该方法主要处理生态敏感区的餐饮水、冲厕黑水和杂排水的混合水,其中冲厕黑水需要全部经过三格式化粪池停留24小时后再纳管。 The method mainly food processing ecologically sensitive areas of water, mixed water and black water flushing drainage heteroaryl, wherein the black water flushing after all three formats requires septic tank stay 24 hours before the nanotube. 污水经污水管道收集汇流至污水站,依次经过预处理、生物处理和污泥处理。 Sewage through sewage pipes to the sewage collection station bus, passes through the pretreatment, biological treatment and sludge treatment.

[0034] 本发明处理实施例的方法在处理污水时,包括预处理,生物处理和污泥处理。 Method [0034] embodiment of the present invention in the treatment of sewage, including pre-treatment, biological treatment and sludge treatment. 适用处理水量范围为5〜1,000t/d。 Applicable range of treated water 5~1,000t / d.

[0035] 具体来说,污水首先进入预处理段,依次经过集水井1、预处理池2和调节池3。 [0035] Specifically, water first enters the pretreatment section, passes through the sump 1, and the adjustment tank 2 pretreatment tank 3. 预处理的作用主要是截留生活污水中的大部分悬浮物质,以及去除水中的油脂,确保后续的生物处理单元正常进行。 The main function is pretreated sewage trapped most of the suspended matter, grease and removing the water, to ensure that the subsequent biological treatment means normal. 其中,机械粗格栅置于集水井入口,作用是去除水中较大的悬浮物,截留生活污水中较大的塑料、树枝等悬浮物,去除一部分非溶解性的有机物。 Wherein the mechanical coarse grid disposed sump inlet, is to remove larger suspended solids in water, sewage trapped in large plastic, tree branches suspended solids, removing a portion of the non-soluble organics. 之后污水进入预处理池,在预处理池入口的粗格栅(第二道粗格栅)用来进一步去除水中的悬浮物, 之后采用带有撇油器的隔油池去除污水中的浮油和重油,最后污水进入调节池。 After the sewage into the pretreatment tank, the pretreatment tank inlet coarse grid (second grid coarse channel) to further removal of suspended matter, grease traps after use with skimmers to remove the oil slick in water and heavy oil, sewage and finally into the conditioning tank. 第三道细格栅置于调节池与厌氧池之间,主要确保膜生物反应器的正常运行。 The third fine grid disposed between the tank and the anaerobic tank regulator, primarily ensure the normal operation of the membrane bioreactor. 调节池出水口处还设置提升泵池,而细格栅安放在厌氧池的壁内,并设置提升导轨,定期将细格栅提升至地面进行清理。 Adjusting tank provided at the outlet tank lift pump, while the fine grid placed in the wall of the anaerobic tank and lifting the guide rail is provided, regularly lifting the fine grid to the surface to clean. 为了保证膜生物反应器的正常运行,必须将各种纤维、渣物、废纸等杂物拦截在系统之外,因此,利用细格栅去除废水中较小的悬浮物。 In order to ensure the normal operation of the membrane bioreactor, various fibers, slag, waste paper and other debris out of the system must be intercepted, and therefore, the waste water is removed using a fine grid of smaller suspension.

[0036] 调节池出水进入AAO-MBR —体化生物反应器(包括AAO及一体化MBR反应器)。 [0036] adjusting tank effluent enters AAO-MBR - body of the bioreactor (MBR including integrated reactor and AAO). 其中AAO包括缺氧池、厌氧池和好氧池。 Wherein AAO including anoxic, anaerobic tank and the aerobic tank.

[0037] 预处理后的污水进入厌氧池4,在这里,污水同来自缺氧池5的回流混合液相混合,回流比为50%。 [0037] The effluent entering the anaerobic pretreatment tank 4, where effluent from the anoxic tank was refluxed with a mixture of 5 is mixed, a reflux ratio of 50%. 在厌氧条件下,污水里的聚磷菌体内的ATP进行水解,放出H3PO4和能量,形成ADP,维持自身生长。 Under anaerobic conditions, the body of water in the phosphate accumulating bacteria ATP hydrolysis, H3PO4 and release energy, form ADP, maintain their own growth. 污泥中的磷在厌氧条件下得到有效的释放,为好氧条件污泥对磷的大量吸收做准备。 Sludge effectively phosphorus released under anaerobic conditions, aerobic conditions for the preparation of absorbing large quantities of sludge phosphorus. 由于缺氧池的回流污泥与进水混合,使饥饿高效的活性污泥快速吸附原水中的溶解性有机物,并对难降解的有机物起到良好的水解作用。 Since the water mixed with return sludge anoxic tank, so that sludge hunger efficient rapid adsorption of dissolved organic matter in the raw water, and refractory organics play a good hydrolysis. 同时,部分NH3-N因细胞的合成得以去除,污水中的NH3-N浓度下降、BOD浓度下降。 Meanwhile, part of NH3-N removal due to the synthesis of the cell, decreased NH3-N concentration in the effluent, BOD concentration decreased.

[0038] 厌氧池4出水与来自膜池7的回流混合液混合进入缺氧池5,在这里完成TN的去除,并保证生物池内的污泥浓度。 [0038] 4 anaerobic tank effluent and the mixture is refluxed from the membrane tank 7 is mixed into the anoxic tank 5, where the complete removal of TN, and to ensure concentration of the biological sludge pool. 厌氧池4出水进入缺氧池5,同时进入的还有膜池7的回流污泥,混合液回流比为50% -150%。 4 anaerobic tank effluent into the anoxic tank 5, while the incoming cell membrane as well as the return sludge 7, return ratio is 50% to 150%. 缺氧池5的首要功能是脱氮,在此反应器中,在缺氧的条件下,反硝化菌利用污水中的有机物作碳源,将膜池7回流污泥中带入的大量硝态氮和亚硝态氮还原为N2并释放到空气中,BOD5浓度继续下降,硝态氮浓度也大幅度下降。 The primary function of the anoxic denitrification 5 is, in this reactor, in the absence of oxygen, denitrifying bacteria use organic matter in sewage as the carbon source, the cell membrane 7 into a large amount of return sludge nitrate and reduced to nitrogen N2 and nitrite released into the air, BOD5 concentration continues to decrease, the concentration of nitrate drastically deteriorated.

[0039] 缺氧池5的出水进入好氧(曝气)池6,在这里完成BOD5的去除和氨氮的硝化。 [0039] 5 into the anoxic aerobic effluent (aeration) cell 6, where the complete nitrification of BOD5 and ammonia removal. 在曝气阶段利用生物池中大量繁殖的活性污泥中微生物以及硝化菌群、聚磷菌,降解或吸附水中含碳、氨氮、磷有机污染物质,以达到净化水质的目的。 Use of biological cell in the aeration phase of activated sludge multiply microorganisms and nitrifying bacteria, phosphorus accumulating bacteria, degradation or carbon-containing adsorption water, ammonia, phosphorus organic pollutants, to achieve the purpose of water purification.

[0040] 好氧池6出水进入膜池7,膜块浸没在混合液中,在渗透(出水)泵产生的负压条件下,水穿过膜而完成过滤处理。 [0040] The aeration tank 6 into the water pool 7 film, the film is immersed in a mixture of the block, the negative pressure in the permeate (water) generated by the pump, the water passes through the membrane filtration process is completed. 膜池7取代了二沉池悬浮物与液体分离和颗粒滤料滤池的功能。 Membrane tank 7 replaces the functionality secondary sedimentation tank separated from the liquid suspension and the filter media particles. 其中,膜生物反应器(MBR)是把膜技术与污水处理中的生化反应结合起来的一项新技术,目前在世界范围内得到越来越广泛地应用。 Wherein the membrane bioreactor (MBR) is a new technique to combine with membrane technology biochemical sewage treatment, the increasingly wide application in the world. 膜池7利用膜对生化反应池内的含泥污水进行过滤,实现泥水分离,膜池7出水进入清水池8。 Pool 7 film on clean water using a membrane pool was filtered biochemical reaction to achieve sludge-water separation, membrane tank 7 into the clean water tank 8. 一方面,膜截留了反应池中的微生物,使池中的活性污泥浓度大大增加,达到很高的水平,使降解污水的生化反应进行得更迅速更彻底,另一方面,由于膜的高过滤精度,保证了出水清澈透明,得到高质量的产水。 In one aspect, the microbial membrane rejection reaction cell, so that the concentration of the activated sludge tank is greatly increased, reached a high level, so that the sewage biochemical degradation reaction proceeds more rapidly and more completely, on the other hand, due to the high membrane filtration precision to ensure that the water is clear and transparent, to obtain a high quality product water. [0041] 膜组件选用设计通量10_20L/m2 · h,鼓风机每8小时切换一次,自吸泵工作13分钟停2分钟。 [0041] The choice of membrane module design throughput 10_20L / m2 · h, the blower is switched once every 8 hours, 13 minutes to stop the work of self-priming pump for 2 minutes. MBR膜区内的吹扫(曝气)有两个用途,一是用于膜组件周围的气水振荡,保持膜表面清洁,二是也可为有机物的进一步降解提供所需要的氧气。 MBR membrane sweep region (aerator) has two purposes, one for gas and water around the membrane oscillations, kept clean film surface, and second, may provide further degradation of organic matter to the desired oxygen. 生物降解后的水在滤液自吸泵的抽提作用下通过MBR膜组件,滤过液经由MBR集水管汇集送到臭氧缓冲接触池。 Water extraction under the effect of biodegradation by self-priming pump MBR membrane filtrate, the filtrate was pooled to ozone contact tank via MBR buffer tube set. 通过膜的高效截留作用,全部细菌及悬浮物均被截流在曝气池中,可以有效截留硝化菌,使硝化反应顺利进行,有效去除氨氮;同时可以截留难于降解的大分子有机物,延长其在反应器中的停留时间,使之得到最大限度的降解。 Through efficient interception of the membrane, all bacteria and suspended solids in the aeration tank are shut off, can be effectively entrapped nitrifying bacteria, nitration reaction to proceed smoothly, effectively remove ammonia; difficult degradation while trapped organic molecules, which extend the residence time in the reactor, so as to maximize the degradation.

[0042] 需要说明的是,本方法所采用的系统中不设置初沉池,因为虽然初沉池可有效的去除SS、BOD5,降低二级生物处理的工程费和运行费,但由于农村污水的进水浓度较低,而最终的处理程度是要达到除磷脱氮,为保证生物除磷脱氮C : N及C : P的基本比值需要, 因此本系统中不设置初沉池。 [0042] Incidentally, the present system is not provided at the beginning of the method employed in the settling tank because, although the primary settling tank can effectively remove SS, BOD5, lower construction and operating cost of secondary biological treatment, but the rural sewage influent concentration is low, and the final degree of treatment is to achieve phosphorus and nitrogen removal, phosphorus and nitrogen removal to ensure the C: N and C: the ratio of the basic needs of the P, so the system is not provided in the primary sedimentation tank.

[0043] 该方法防止减轻膜污染的工艺设计如下: [0043] This method of preventing fouling mitigation process is designed as follows:

[0044] 1)膜池设置MBR膜组件系统及配套的出水、反洗、清洗、吹扫、吊装等系统。 [0044] 1) MBR membrane in the membrane tank system is provided and supporting the water backwash, washing, purging, hoisting system. 所述膜组件位于穿孔曝气管正上方。 The membrane is located directly above the perforated aeration tube. 膜组件下部设置专用的吹扫系统,吹扫抖动膜元件,以延缓膜元件周边的污泥浓度累积。 A lower membrane systems a dedicated purge, purge jitter membrane element, the membrane element in order to delay the surrounding sludge concentration accumulation. 剩余污泥通过剩余污泥泵定期排出,可控制系统内活性污泥的浓度及污泥龄。 The remaining sludge is periodically discharged through the remaining sludge pump, the concentration can be within the control system and SRT activated sludge.

[0045] 2)采用多级粗细格栅,保证预处理效果。 [0045] 2) multi-level grating thickness, to ensure the effect of pretreatment.

[0046] 3)基于上述设计,通过组合曝气、曝气时间曝气量与间歇时间的控制、自吸泵运行与间歇时间控制、减轻膜在运行中的污染程度,减少膜清洗频率,保证膜系统水通量,延长膜使用寿命,降低运行费用。 [0046] 3) Based on the above design, by combining the control aeration, time of aeration and quiescent period, pump run time intermittent control, reduce the degree of membrane fouling during operation, to reduce the frequency of cleaning the membrane, to ensure water flux of membrane systems, extended membrane life and reduce operating costs.

[0047] 由以上实施例可以看出,本发明实施例的方法主要采用MBR技术处理生态敏感区的生活污水,采用厌氧_缺氧_好氧-MBR联用技术,具有较高的处理效率和稳定处理效果。 [0047] As can be seen from the above embodiments, the method of the present invention, the embodiment mainly MBR technology sewage treatment ecologically sensitive areas, anoxic anaerobic _ _ aerobic -MBR hyphenated techniques, having a high efficiency and processing stabilizing effect. 实验表明,在进水COD为400mg/L, NH4+_N为40mg/L, SS为200mg/L,总磷为6mg/L,总氮为55mg/L的条件下,MBR反应器出水COD为14mg/L,氨氮为0. 38mg/L,悬浮物为10mg/L, 总氮为5. 34mg/L,总磷为0. 484mg/L,出水水质可达到《城镇污水处理厂污染物排放标准》 (GB18918-2002)中一级A 标准。 Experiments show that, in the influent COD 400mg / L, NH4 + _N of 40mg / L, SS was 200mg / L, TP of 6mg / L, total nitrogen under the conditions of 55mg L /, MBR reactor effluent COD of 14mg / L, ammonia is 0. 38mg / L, suspension of 10mg / L, total nitrogen 5. 34mg / L, TP is 0. 484mg / L, the effluent quality can be achieved "urban sewage treatment plant emission standards" (of GB18918-2002) in an A standard.

[0048] 该方法适合处理的污水水质的各指标如表1所示: [0048] Sewage water quality indexes for the processing method shown in Table 1:

[0049] 表1 [0049] TABLE 1

[0050] [0050]

[0051] 污水经本方法处理后,出水可以达到表2所示的水质,满足《城镇污水处理厂污染物排放标准》(GB18918-2002)中一级A排放标准。 [0051] After the process of sewage treatment, effluent quality can be achieved as shown in Table 2, to meet the "urban sewage treatment plant emission standards" (of GB18918-2002) A in a discharge standard. 另外,该方法出水经消毒后可以满足《污水再生利用工程设计规范》(GB/T 50335-2002)中的标准,回用于绿化、冲厕、洗车以及景观用水等。 Further, the process after the water sterilized meet standard (GB / T 50335-2002) in "wastewater reclamation and reuse design specifications," Virescence, flushing, washing and landscape water.

[0052]表 2 [0052] TABLE 2

[0053] [0053]

[0054] 本发明还提供了一种生态敏感区污水处理系统,包括:依次连接的集水井、预处理池、厌氧池、缺氧池、好氧池和膜池,从集水井来的污水经过预处理池处理之后调节池,然后进入厌氧池,在厌氧池中污水同来自缺氧池的回流混合液相混合;厌氧池出水与来自膜池的回流混合液混合进入缺氧池;缺氧池出水进入好氧池;好氧池出水进入膜池,在膜池中完成过滤处理。 [0054] The present invention further provides an ecologically sensitive areas wastewater treatment system, comprising: a set of sequentially connected well, pretreatment tank, anaerobic tank, anoxic, aerobic tank and the membrane tank to waste water from the sump after pooling pre-adjusted pool, and then into the anaerobic tank, is mixed with the reflux of the mixture from the anoxic tank in anaerobic wastewater; anaerobic tank effluent and the mixture was refluxed from the membrane into the anoxic mix tank ; anoxic effluent into the aerobic tank; aerobic tank effluent into the cell membrane, the membrane filtration treatment tank is completed. 该系统的各个组成部分之间的连接关系及使用的工艺参数如前所述。 Process parameters for the connection between the various components of the system and used as previously described. 在本实施例中,该系统还设置PLC系统,其用于调节污水在调节池中的停留时间、调节设置于调节池和厌氧池之间的提升泵的流量,并调节分别设置于好氧池和膜池内的风机的运行时间与风量。 In the present embodiment, the system PLC system is also provided for adjusting the dwell time of the sewage in the conditioning tank, for adjusting the flow rate adjustment is provided between the lift pump and the tank anaerobic tank and the aerobic tank are provided on adjusting and the running time of the fan and air volume pool membrane. 所述调节池内还设置用于监测水位的在线液位计。 The adjustment line is also provided pool level gauge for monitoring the water level.

[0055] 进行上述实验时,该系统的运行费用约为1元/吨水。 When [0055] The experiment described above, the operating cost of the system is about one yuan / ton of water.

[0056] 以上所述仅是本发明的实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变型,这些改进和变型也应视为本发明的保护范围。 [0056] The above are only embodiments of the present invention, it should be noted that those of ordinary skill in the art, in the art without departing from the principles of the present invention is provided, you can make various modifications and variations, these improvements and variations shall also be considered in the scope of the invention.

9 9

Claims (10)

  1. 一种生态敏感区污水处理方法,其特征在于,包括步骤:S1,预处理:使用入口设置有机械粗格栅的集水井(1)去除污水中较大的悬浮物,之后污水进入预处理池(2),设置在预处理池(2)入口的粗格栅进一步去除污水中的悬浮物,然后采用隔油池去除污水中的动植物油和矿物油,最后污水进入调节池(3)进行处理;S2,生物处理及污泥处理:预处理后的污水进入厌氧池(4),在厌氧池(4)中同来自缺氧池(5)的回流混合液混合;厌氧池(4)出水与来自膜池(7)的回流混合液混合进入缺氧池(5),同时实现混合液与污泥回流,缺氧池(5)出水进入好氧池(6);好氧池(6)出水进入膜池(7),在膜池(7)完成生物降解以及负压条件下的过滤处理。 Wastewater treatment method of ecologically sensitive areas, characterized by, comprising the steps of: Sl, pre-treatment: using an entry is provided with a mechanical coarse grid sump (1) removing large suspended solids in the sewage, after the sewage into the pretreatment tank (2) is provided (2) further removal of coarse grid inlet sewage suspension, removing the grease trap and wastewater using animal and vegetable oils and mineral oils, and finally into the conditioning water tank (3) in the pool of pre-treatment ; S2, biological treatment and sludge treatment: after pretreatment of sewage into the anaerobic tank (4), in the anaerobic tank (4) mixing with the mixture from the anoxic reflux (5); anaerobic tank (4 ) was mixed with a mixture of water refluxed from the membrane cell (7) into the anoxic tank (5), and the mixture while achieving sludge return, the anoxic tank (5) effluent into the aerobic tank (6); aerobic tank ( 6) the water enters the membrane cell (7), to complete biodegradation in the membrane tank (7) and the filtering process under negative pressure conditions.
  2. 2.如权利要求1所述的生态敏感区污水处理方法,其特征在于,污水在集水井中的停留时间为1〜2小时;污水在隔油池中的停留时间为2〜4小时,且隔油池内设置带式撇油器;污水在调节池中的停留时间为8〜16小时,且在调节池内设置搅拌机或在其底部布置穿孔管用于曝气。 2. The wastewater treatment method according to claim 1 ecologically sensitive areas, wherein the residence time of water in the sump for ~ 2 hours; the residence time of water in the grease trap is 2 ~ 4 hours, and the grease trap is provided with a skimmer; the residence time of water in the pool is adjusted to 8~16 hours, and in the regulation of pool or agitator disposed at the bottom thereof is disposed a perforated aeration tube is used.
  3. 3.如权利要求1所述的生态敏感区污水处理方法,其特征在于,所述机械粗格栅的栅条间距为20mm ;所述粗格栅的栅条间距为5mm ;在调节池(3)和厌氧池(4)之间设置细格栅,其栅条间距为0. 5mm。 3. The wastewater treatment method according to claim 1 ecologically sensitive areas, wherein said mechanical gridlines coarse grid spacing 20mm; gridlines of the coarse grid spacing of 5mm; the adjustment tank (3 disposed between the fine grid) and an anaerobic tank (4), which is the gate finger pitch 0. 5mm.
  4. 4.如权利要求1所述的生态敏感区污水处理方法,其特征在于,污水在厌氧池中的处理时间为2〜4小时;在缺氧池中的处理时间为2〜4小时;在好氧池中的处理时间为3〜 5小时,泥龄为15-25d ;在好氧池内设置微孔曝气头,以便向好氧池供氧,微孔曝气头孔径为<2 215,好氧池内的气水比为8 : 1。 4. The wastewater treatment method according to claim 1 ecologically sensitive areas, wherein the anaerobic tank sewage treatment time is 2 ~ 4 hours; in the anoxic treatment time is 2 ~ 4 hours; processing time for aerobic tank 3 ~ 5 hours, the sludge age is 15-25d; microporous aeration head disposed in aerobic tanks for supplying oxygen to the aerobic tank, a pore size of porous aeration head <2215, gas-water ratio of aerobic tanks 8: 1.
  5. 5.如权利要求1〜4之任一项所述的生态敏感区污水处理方法,其特征在于,所述膜池为膜生物反应器,污水在所述膜生物反应器中的处理时间为3〜5小时,其中的污泥浓度为2000〜5000mg/L、气水比为20〜30 : 1、混合液回流比为500〜150% ;膜生物反应器的自吸泵运行时间为运行13min,停止2min,其鼓风机的切换时间为8小时、膜通量为10〜 20L/m2ho The method as claimed in any one of the sewage treatment ecologically sensitive areas of claim 1 ~ 4, wherein the membrane is a cell membrane bioreactor wastewater treatment time of the membrane bioreactor is 3 ~ 5 hours, wherein the concentration of sludge 2000~5000mg / L, air-water ratio is 20 to 30: 1, the mixture was reflux ratio 500~150%; priming pump membrane bioreactor run time operation for 13min, stop 2min, which blower switching time of 8 hours, the membrane flux is 10~ 20L / m2ho
  6. 6. 一种生态敏感区污水处理系统,其特征在于,包括:依次连接的集水井(1)、预处理池(2)、厌氧池(4)、缺氧池(5)、好氧池(6)和膜池(7),从集水井(1)来的污水经过预处理池(2)处理之后调节池,然后进入厌氧池(4),在厌氧池(4)中污水同来自缺氧池(5)的回流混合液相混合;厌氧池(4)出水与来自膜池(7)的回流混合液混合进入缺氧池(5);缺氧池(5)出水进入好氧池(6);好氧池(6)出水进入膜池,在膜池(7)中完成过滤处理。 A sewage treatment system ecologically sensitive areas, characterized by comprising: sequentially connected sump (1), pretreatment tank (2), an anaerobic tank (4), the anoxic tank (5), the aerobic tank (6) and the membrane cell (7), from the collection well (1) to the water tank after adjustment through the pretreatment tank (2) and then into the anaerobic tank (4), with the sewage in an anaerobic tank (4) the mixture was refluxed from the anoxic tank (5) are mixed; anaerobic tank (4) water and the mixture was refluxed from the membrane cell (7) is mixed into the anoxic tank (5); anoxic tank (5) into the effluent good oxygen tank (6); aerobic tank (6) the water tank into the membrane, the filtering process is completed in a membrane cell (7).
  7. 7.如权利要求6所述的生态敏感区污水处理系统,其特征在于,还包括机械粗格栅,其位于所述集水井(1)的入口处;还包括粗格栅,其位于所述预处理池(2)的入口处;还包括细格栅,其位于所述调节池(3)和厌氧池(4)之间。 7. ecologically sensitive areas wastewater treatment system according to claim 6, characterized in that, further comprising a mechanical coarse grid, which is located in said sump (1) at the inlet; further comprising a coarse grid, which is located pretreatment tank (2) at the inlet; further comprises a fine grid, which is located in the adjustment tank (3) and an anaerobic tank (4) between the.
  8. 8.如权利要求6所述的生态敏感区污水处理系统,其特征在于,所述膜池(7)为膜生物反应器MBR,其包括膜组件、穿孔曝气管、出水系统、反洗系统、清洗系统、吹扫系统以及吊装系统,所述膜组件位于所述穿孔曝气管正上方,所述吹扫系统设置在所述膜组件的下方。 8. ecologically sensitive areas wastewater treatment system according to claim 6, wherein the membrane cell (7) of the MBR membrane bioreactor which comprises a membrane, a perforated aeration tube, the water system, backwash system , cleaning system, and the system was purged hoisting system, said membrane is located directly above said perforated aeration tube, said purge system is disposed below the membrane module.
  9. 9.如权利要求6所述的生态敏感区污水处理系统,其特征在于,还包括可编程逻辑控制器系统,其用于调节污水在调节池(3)中的停留时间、调节设置于调节池(3)和厌氧池(4)之间的提升泵的流量,并调节分别设置于好氧池(6)和膜池(7)内的风机的运行时间与风量。 9. ecologically sensitive areas wastewater treatment system according to claim 6, characterized in that the system further comprises a programmable logic controller, for regulating the residence time of water in the regulation tank (3), adjusting the adjusting tank provided (3) an anaerobic tank and flow between the lift pump (4), and adjust the aerobic tank are provided in (6) and the membrane cell (7) in the running time of the fan and air volume. 2 2
  10. 10.如权利要求6〜9之任一项所述的生态敏感区污水处理系统,其特征在于,所述调节池(3)内设置用于监测水位的在线液位计。 As claimed in any of claims 6~9 ecologically sensitive areas wastewater treatment system, wherein the adjustment line level gauge disposed inside the tank (3) for monitoring the water level.
CN 200910243577 2009-12-28 2009-12-28 Sewage treatment method and system in ecological sensitive areas CN101928096B (en)

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CN102020402A (en) * 2011-01-04 2011-04-20 上海市城市建设设计研究院 Energy-saving sewage treatment method by membrane biological reactor (MBR) process
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CN104230107B (en) * 2014-03-31 2016-03-02 中联环股份有限公司 One kind a2 / o + mbr composition wastewater reclamation process and apparatus
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CN104030521A (en) * 2014-05-21 2014-09-10 成都振中电气有限公司 Wastewater treatment device
CN104261614A (en) * 2014-08-05 2015-01-07 天津市市政工程设计研究院 Step-feed multi-stage AO+MBR (Anoxic/Oxic+Membrane Biological Reactor) nitrogen and phosphorus removal system
CN104291518B (en) * 2014-08-25 2016-08-24 杭州清城能源环保工程有限公司 Processing system discharge standards and a high-concentration wastewater treatment Livestock
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