CN101870543B - Landfill percolate treatment novel process - Google Patents
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Abstract
本发明涉及一种垃圾渗滤液处理的新工艺方法，包括以下步骤：(1)将垃圾渗滤液收集汇入调节池；(2)调节池出水提升进入氨吹脱反应器；(3)垃圾渗滤液经氨吹脱后进行混凝沉淀处理；(4)混凝沉淀出水进入厌氧反应器进行厌氧处理；(5)厌氧反应器出水依次进入缺氧池、好氧池和MBR反应池，所述的MBR反应池至缺氧池有混合液回流，MBR反应池中使用的膜组件为平板MBR膜组件，MBR形式为淹没式；(6)MBR反应池出水进入反渗透系统，处理后的出水直接排出，反渗透浓缩液回流至调节池。本发明针对垃圾渗滤液水质特点，物化处理和生物处理单元合理结合，具有工艺流程短而紧凑、处理效率高、能耗低和膜组件使用寿命长等优点。
The invention relates to a new process for treating landfill leachate, which comprises the following steps: (1) collecting landfill leachate into a regulating tank; (2) lifting water from the regulating pond into an ammonia stripping reactor; (3) infiltrating landfill The filtrate is subjected to coagulation and sedimentation treatment after being blown off by ammonia; (4) The effluent of the coagulation sedimentation enters the anaerobic reactor for anaerobic treatment; (5) The effluent of the anaerobic reactor enters the anoxic pool, the aerobic pool and the MBR reaction pool in turn , there is mixed liquid backflow from the MBR reaction tank to the anoxic tank, the membrane module used in the MBR reaction tank is a flat MBR membrane module, and the MBR form is a submerged type; (6) the MBR reaction tank effluent enters the reverse osmosis system, and after treatment The effluent is directly discharged, and the reverse osmosis concentrate is returned to the regulating tank. According to the water quality characteristics of landfill leachate, the invention combines physical and chemical treatment and biological treatment units reasonably, and has the advantages of short and compact process flow, high treatment efficiency, low energy consumption and long service life of membrane components.
Description
技术领域 technical field
本发明涉及一种垃圾渗滤液处理的工艺方法。 The invention relates to a process method for treating landfill leachate.
背景技术 Background technique
垃圾卫生填埋处理具有投资小、运行费用低、操作设备简单、可以处理多种类型的垃圾等特点，是我国城市目前乃至以后很多年垃圾处理最主要的方式。但卫生填埋法存在一个很关键的问题，即垃圾渗滤液的收集和处理问题。垃圾渗滤液是垃圾在堆放和填埋过程中由于发酵、雨水冲刷和地表水、地下水浸泡而渗滤出来的一种高浓度有机废水。 Sanitary landfill treatment of garbage has the characteristics of small investment, low operating cost, simple operation equipment, and can handle various types of garbage. It is the most important way of garbage treatment in cities in my country at present and in the future. However, there is a very critical problem in the sanitary landfill method, that is, the collection and treatment of landfill leachate. Landfill leachate is a kind of high-concentration organic wastewater leached out due to fermentation, rainwater washing, surface water and groundwater immersion in the process of garbage stacking and landfilling.
垃圾渗滤液的处理方法包括物理化学法和生物法。垃圾渗滤液的负荷很高，处理难度较大，用一种方法很难达到处理要求，一般为几种方法的结合。我国的渗滤液处理大致经历以下三个阶段，即（1）参考城市污水厂处理工艺来选择渗滤液处理工艺阶段；（2）逐步认识渗滤液的特性后，逐步调整渗滤液处理工艺；（3）随着环境保护要求越来越严格后，采用一般生物处理+深度处理工艺阶段。 Treatment methods for landfill leachate include physical, chemical and biological methods. The load of landfill leachate is very high, and the treatment is difficult. It is difficult to meet the treatment requirements with one method, and it is generally a combination of several methods. The leachate treatment in my country generally goes through the following three stages, namely (1) select the leachate treatment process stage by referring to the treatment process of the urban sewage plant; (2) gradually adjust the leachate treatment process after gradually understanding the characteristics of the leachate; (3) ) As the requirements for environmental protection become more and more stringent, the general biological treatment + advanced treatment process stage is adopted.
目前，国内正在运行的大部分渗滤液处理系统，生物处理以普通生化工艺为主，辅以简单物化处理，技术水平比较落后，不能达到设计处理效果。主要原因是：①氨氮浓度高。垃圾渗滤液氨氮浓度一般从数十到几千mg/L不等。由于高浓度的氨氮对生物处理系统有一定的抑制作用，以及高浓度的氨氮造成渗滤液中的C／N失调，生物脱氮难以进行，导致最终出水难以达标。②工艺适应性差。随着填埋时间的延长，营养元素严重失调，渗滤液C/N下降，可生化性降低，抗冲击负荷能力差。国内目前另一垃圾渗滤液处理主体工艺是DT-RO反渗透工艺，但此工艺中，核心产品反渗透膜组件，为国外产品垄断，价格昂贵，一次性建设投资高于生物法，运行费用高。如前处理效果不好，进入反渗透系统的污水污染物浓度高，增加膜的处理压力，容易造成膜污染，增加膜的清洗和更换费用，达不到设定处理效率。此外污染物未得到有效去除，集中在浓缩液中，造成二次污染。 At present, most of the leachate treatment systems currently in operation in China use ordinary biochemical processes as the main biological treatment, supplemented by simple physical and chemical treatment. The technical level is relatively backward and cannot achieve the designed treatment effect. The main reasons are: ①The concentration of ammonia nitrogen is high. The concentration of ammonia nitrogen in landfill leachate generally ranges from tens to thousands of mg/L. Because the high concentration of ammonia nitrogen has a certain inhibitory effect on the biological treatment system, and the high concentration of ammonia nitrogen causes the C/N imbalance in the leachate, the biological denitrification is difficult, and the final effluent is difficult to meet the standard. ② Poor process adaptability. With the prolongation of the landfill time, the nutrient elements are seriously out of balance, the C/N of the leachate decreases, the biodegradability decreases, and the impact load resistance is poor. At present, another domestic landfill leachate treatment main process is DT-RO reverse osmosis process, but in this process, the core product reverse osmosis membrane module is monopolized by foreign products, the price is expensive, the one-time construction investment is higher than the biological method, and the operating cost is high . If the pretreatment effect is not good, the concentration of sewage pollutants entering the reverse osmosis system will be high, which will increase the treatment pressure of the membrane, easily cause membrane pollution, increase the cleaning and replacement costs of the membrane, and fail to reach the set treatment efficiency. In addition, the pollutants have not been effectively removed and are concentrated in the concentrate, causing secondary pollution.
中国专利公开了一些垃圾渗滤液处理的新技术方案，其中专利号为2006100345178名称为《一种垃圾渗滤液处理方法》公开了一种采用MBR对垃圾渗滤液进行处理的方法，该工艺流程中垃圾渗滤液在进入膜生物反应池之前需要采用两级接触氧化进行好氧处理，根据其说明书记载好氧处理与膜生物反应池之间还需要中间沉淀池，膜生物反应池还包括厌氧区、接触氧化区和膜处理区三部分，实际上垃圾渗滤液不仅在在两级接触氧化步骤中进行了反硝化+硝化反应，而且在膜生物反应池中又进行了反硝化+硝化反应，只有采用该技术方案，才能达到如说明书所述的处理效果，故该技术方案工艺流程长，需要的各种反应池较多，占地面积大，投资大，且该技术方案采用纳滤对经过膜生物反应池处理的渗滤液进行进一步处理，已经达不到《生活垃圾填埋场污染控制标准》（GB16889－2008）的要求。另一专利申请号为2009100847445名称为《一种垃圾渗滤液的处理工艺及装置》又公开了一种采用淹没式膜生物反应器对垃圾渗滤液进行处理的方法，该方法在前期未采用相应的脱氮、混凝等工序对垃圾渗滤液进行处理，而垃圾渗滤液中含有大量的悬浮物、胶体粒子或其他杂质，由于未经过相应的步骤将其去除，污水在进行淹没式膜生物处理时，大量的悬浮物、胶体粒子或其他杂质会吸附在膜组件上，降低了膜组件处理效率和使用寿命，增加了处理成本。 Chinese patents disclose some new technical solutions for landfill leachate treatment, among which the patent number is 2006100345178 and the title is "A Method for Landfill Leachate Treatment", which discloses a method for treating landfill leachate using MBR. Before the leachate enters the membrane bioreaction tank, it needs to use two-stage contact oxidation for aerobic treatment. According to its instructions, an intermediate sedimentation tank is required between the aerobic treatment and the membrane bioreaction tank. The membrane bioreaction tank also includes anaerobic zone, contact In fact, the landfill leachate not only undergoes denitrification + nitrification reaction in the two-stage contact oxidation step, but also undergoes denitrification + nitrification reaction in the membrane bioreaction tank. The technical solution can only achieve the treatment effect as described in the manual, so the technical solution has a long process flow, requires more various reaction tanks, occupies a large area, and requires a large investment. The leachate treated in the pool is further treated, which has failed to meet the requirements of the "Standards for Pollution Control of Domestic Waste Landfill Sites" (GB16889-2008). Another patent application No. 2009100847445 titled "A Treatment Process and Device for Landfill Leachate" also discloses a method for treating landfill leachate using a submerged membrane bioreactor. The landfill leachate is treated by denitrification, coagulation and other processes, and the landfill leachate contains a large amount of suspended solids, colloidal particles or other impurities. Since they have not been removed through corresponding steps, the sewage is treated with submerged membrane biology. , a large amount of suspended matter, colloidal particles or other impurities will be adsorbed on the membrane module, which reduces the treatment efficiency and service life of the membrane module, and increases the treatment cost.
发明内容 Contents of the invention
本发明要解决的技术问题是：提供一种工艺流程短而紧凑、处理效率高、能耗低和膜组件使用寿命长的垃圾渗滤液处理工艺，解决了上述现有技术中存在的问题。 The technical problem to be solved by the present invention is to provide a landfill leachate treatment process with short and compact process flow, high treatment efficiency, low energy consumption and long service life of membrane modules, which solves the above-mentioned problems in the prior art.
解决上述技术问题的技术方案是：一种垃圾渗滤液处理工艺，包括以下步骤， The technical solution for solving the above-mentioned technical problems is: a landfill leachate treatment process, comprising the following steps,
（1）将垃圾渗滤液收集汇入调节池，以对渗滤液水质水量进行有效调节，调节池的主要作用为调节填埋场中水力负荷和有机负荷，减轻冲击负荷对渗滤液处理设施的影响，最大限度降低垃圾渗滤液溢出对周围环境的影响； (1) Collect the landfill leachate into the adjustment tank to effectively adjust the water quality and quantity of the leachate. The main function of the adjustment tank is to adjust the hydraulic load and organic load in the landfill and reduce the impact of impact load on the leachate treatment facilities. , to minimize the impact of landfill leachate overflow on the surrounding environment;
（2）调节池出水提升进入氨吹脱反应器，以去除大量的游离氨及部分苯酚、氰化物、硫化物及其他难以生化降解的、对生化处理有抑制作用的、毒性大的挥发性物质，以有利于后续生化处理的稳定进行； (2) The effluent from the regulating tank is lifted into the ammonia stripping reactor to remove a large amount of free ammonia and some phenols, cyanides, sulfides and other volatile substances that are difficult to biochemically degrade, have an inhibitory effect on biochemical treatment, and are highly toxic , in order to facilitate the stable progress of the subsequent biochemical treatment;
（3）垃圾渗滤液经氨吹脱后进行混凝沉淀处理，混凝剂为聚合氯化铝或聚合硫酸铁，混凝剂添加量为100mg/L～800mg/L，沉淀时间1～3h；作用是减少渗滤液中SS、胶体粒子及少量COD和重金属离子对后续生化处理的负荷冲击，提高运行稳定性； (3) The landfill leachate is subjected to coagulation and precipitation treatment after being blown off by ammonia. The coagulant is polyaluminum chloride or polyferric sulfate. The amount of coagulant added is 100mg/L～800mg/L, and the precipitation time is 1～3h; The function is to reduce the load impact of SS, colloidal particles and a small amount of COD and heavy metal ions in the leachate on the subsequent biochemical treatment, and improve the operation stability;
（4）混凝沉淀出水进入厌氧反应器进行厌氧处理，考虑到垃圾渗滤液前期COD浓度高，因此混凝沉淀出水进入厌氧反应器，降低COD负荷，垃圾渗滤液后期COD浓度低，且可生化性较差，此时厌氧反应器主要进行水解酸化作用，以提高渗滤液的可生化性，实现工艺对渗滤液水质变化的适应性，保证处理结果的稳定性； (4) The coagulation sediment effluent enters the anaerobic reactor for anaerobic treatment. Considering the high COD concentration of the landfill leachate in the early stage, the coagulation sediment effluent enters the anaerobic reactor to reduce the COD load, and the COD concentration of the landfill leachate is low in the later stage. And the biodegradability is poor. At this time, the anaerobic reactor mainly performs hydrolysis and acidification to improve the biodegradability of the leachate, realize the adaptability of the process to the change of the leachate water quality, and ensure the stability of the treatment results;
（5）厌氧反应器出水依次进入缺氧池、好氧池和MBR反应池，所述的MBR反应池至缺氧池有混合液回流，反应池中使用的膜组件为平板MBR膜组件，MBR形式为淹没式；所述的厌氧反应器出水在缺氧池HRT不小于30h，在好氧池和MBR反应池HRT不小于60h，MBR反应池至缺氧池混合液回流比为3～5：1，缺氧池、好氧池和MBR反应池污泥浓度维持在10000mg/L～15000mg/L；缺氧池、好氧池和MBR反应池是主要的生化处理单元，渗滤液在缺氧（A）池内主要进行反硝化脱氮，在好氧（O）池和MBR反应池主要进行有机物和有机氮、氨氮的去除，通过MBR反应池和A池之间的混合液回流去除总氮； (5) The effluent from the anaerobic reactor enters the anoxic pool, the aerobic pool and the MBR reaction pool in turn. The mixed liquid flows back from the MBR reaction pool to the anoxic pool. The membrane modules used in the reaction pools are flat MBR membrane modules. The form of MBR is submerged; the HRT of the anaerobic reactor is not less than 30h in the anoxic pool, and the HRT in the aerobic pool and the MBR reaction pool is not less than 60h, and the reflux ratio of the mixed solution from the MBR reaction pool to the anoxic pool is 3～ 5:1, the sludge concentration in the anoxic tank, aerobic tank and MBR reaction tank is maintained at 10000mg/L～15000mg/L; the anoxic tank, aerobic tank and MBR reaction tank are the main biochemical treatment units, and the leachate is The oxygen (A) tank is mainly used for denitrification and denitrification, and the aerobic (O) tank and the MBR reaction tank are mainly used for the removal of organic matter, organic nitrogen and ammonia nitrogen, and the total nitrogen is removed through the reflux of the mixed solution between the MBR reaction tank and the A tank;
（6）MBR反应池出水进入反渗透系统，所述的反渗透系统为一级反渗透，反渗透膜选卷式膜，一级两段。以去除生化处理难去除的COD，及残留的氨、金属及色度，保证出水达标，处理后的出水直接排出，反渗透浓缩液回流至调节池。 (6) The effluent from the MBR reaction tank enters the reverse osmosis system. The reverse osmosis system is one-stage reverse osmosis, and the reverse osmosis membrane is a coil-selected membrane, one stage and two stages. To remove COD that is difficult to remove by biochemical treatment, as well as residual ammonia, metals and chroma, to ensure that the effluent reaches the standard, the treated effluent is directly discharged, and the reverse osmosis concentrate is returned to the regulating tank.
本发明的进一步技术方案是：步骤（5）所述好氧池分2～5格，穿孔墙连接，最后一格为MBR反应池，放置MBR膜组件，所述的好氧池和MBR反应池内曝气采用鼓风曝气，缺氧池通过潜水搅拌方式防止泥沉积。 A further technical solution of the present invention is: the aerobic pool in step (5) is divided into 2 to 5 grids, connected by perforated walls, the last grid is an MBR reaction pool, and MBR membrane modules are placed, and the aerobic pool and the MBR reaction pool are Blast aeration is used for aeration, and the anoxic tank prevents mud deposition through submerged stirring.
所述的步骤（1）垃圾渗滤液在调节池HRT≥90天。 In the step (1) the HRT of the landfill leachate in the adjustment tank is ≥ 90 days.
步骤（2）所述的氨吹脱反应器为氨吹脱塔，氨吹脱工艺采用空气吹脱，调节池出水首先经提升泵，泵入pH调节池，调节pH至9～11，通过竖流式沉淀池去除沉淀，沉淀时间1～3h，沉淀池出水泵入氨吹脱塔去除游离氨氮，氨吹脱塔为填料塔或折流板塔，吹脱时上进水，下部曝气，气水比2500～5500：1。 The ammonia blow-off reactor described in step (2) is an ammonia blow-off tower, and the ammonia blow-off process adopts air blow-off, and the effluent from the adjustment tank is first pumped into the pH adjustment tank through the lift pump, and the pH is adjusted to 9-11, and the water is passed through the vertical The flow-type sedimentation tank removes the sediment. The sedimentation time is 1-3 hours. The effluent of the sedimentation tank is pumped into the ammonia stripping tower to remove free ammonia nitrogen. The ammonia stripping tower is a packed tower or a baffle tower. The gas-water ratio is 2500-5500:1.
步骤（4）所述的厌氧反应器为UASB或UBF，上部设三相分离器，在厌氧反应器中HRT不小于70h。 The anaerobic reactor described in step (4) is UASB or UBF, and a three-phase separator is arranged on the upper part, and the HRT in the anaerobic reactor is not less than 70h.
由于采用上述技术方案，本发明具有以下有益效果： Owing to adopting above-mentioned technical scheme, the present invention has following beneficial effect:
1、工艺流程短而紧凑、处理效率高：本发明针对垃圾渗滤液水质特点，物化处理和生物处理单元合理结合，工艺流程短而紧凑。氨吹脱有效降低氨氮浓度，保证后续硝化/反硝化的连续进行，混凝沉淀有效去除部分COD、盐度、金属和氨氮，一方面降低对后续生化处理的毒性，另一方面降低对后续MBR、反渗透的污染概率。生化处理采用厌氧、硝化、反硝化和MBR工艺，其中MBR为淹没式一体化MBR，MBR反应池至反硝化池有混合液回流。MBR由于膜的截留作用，可有效截留硝化菌和难降解有机物降解菌，提高其去除效率，并可维持缺氧池、好氧池和MBR反应池内高污泥浓度，维持污泥活性，提高抗冲击负荷能力，MBR有效运行后，可去除大部分有机物，其对SS的去除效率也可达95%以上，有效保护后续反渗透膜不被污染，并降低后续反渗透进水压力，延缓反渗透膜污染，增加反渗透膜运行时间，产生浓缩液量较少，浓缩液中污染物浓度低，亦好处理。 1. The process flow is short and compact, and the treatment efficiency is high: the present invention aims at the characteristics of landfill leachate water quality, and the physical and chemical treatment and biological treatment units are reasonably combined, and the process flow is short and compact. Ammonia stripping can effectively reduce the concentration of ammonia nitrogen and ensure the continuous progress of subsequent nitrification/denitrification. Coagulation and sedimentation can effectively remove part of COD, salinity, metals and ammonia nitrogen. On the one hand, it reduces the toxicity to subsequent biochemical treatments; , Pollution probability of reverse osmosis. The biochemical treatment adopts anaerobic, nitrification, denitrification and MBR processes, in which the MBR is a submerged integrated MBR, and the mixed liquid flows back from the MBR reaction tank to the denitrification tank. Due to the interception effect of the membrane, MBR can effectively intercept nitrifying bacteria and refractory organic matter degrading bacteria, improve their removal efficiency, and maintain high sludge concentration in the anoxic tank, aerobic tank and MBR reaction tank, maintain sludge activity, and improve resistance Impact load capacity, MBR can remove most organic matter after effective operation, and its removal efficiency for SS can reach more than 95%, which can effectively protect the subsequent reverse osmosis membrane from being polluted, reduce the subsequent reverse osmosis inlet water pressure, and delay reverse osmosis Membrane fouling increases the operating time of the reverse osmosis membrane, produces less concentrated liquid, and the concentration of pollutants in the concentrated liquid is low, which is also easy to deal with.
2、能耗低：本发明流程短，水力提升较少；此外MBR形式为淹没式，靠重力或抽吸出水，所需动力费用远低于靠泵增压的外置式MBR。 2. Low energy consumption: the process of the invention is short, and the hydraulic lift is less; in addition, the MBR form is submerged, and the water is discharged by gravity or suction, and the required power cost is much lower than that of the external MBR that is pressurized by a pump.
3、膜组件处理效率高、使用寿命长：本发明前期采用了相应的脱氮、混凝等工序对垃圾渗滤液进行处理，去除了垃圾渗滤液中含有的大量悬浮物、胶体粒子等杂质，污水在进行淹没式膜生物反应器处理时，膜组件上不易被杂质污染，膜组件处理效率高、使用寿命长；另外现有的垃圾渗滤液处理工艺中，普遍认为中空纤维式MBR膜组件处理效果较好，基本都是选用中空纤维式MBR膜组件，此种膜易断丝、易污染、清洗频繁、维护不方便、膜寿命短，而本发明的MBR膜组件为平板式膜组件，具有抗污染、易清洗、清洗周期长、运行稳定、膜组件寿命长的特点，适合高污泥浓度的工作状态。 3. The membrane module has high treatment efficiency and long service life: in the early stage of the present invention, the corresponding denitrification, coagulation and other processes are used to process the landfill leachate, and a large amount of suspended solids, colloidal particles and other impurities contained in the landfill leachate are removed. When the sewage is treated in a submerged membrane bioreactor, the membrane modules are not easily polluted by impurities, and the membrane modules have high treatment efficiency and long service life; in addition, in the existing landfill leachate treatment process, it is generally believed that the hollow fiber MBR membrane module treatment The effect is better, and the hollow fiber MBR membrane module is basically selected. This kind of membrane is easy to break, easy to pollute, frequent cleaning, inconvenient maintenance, and short membrane life. The MBR membrane module of the present invention is a flat membrane module, which has Anti-pollution, easy to clean, long cleaning cycle, stable operation, long life of membrane components, suitable for working conditions with high sludge concentration.
4、与碟管式反渗透（DT-RO反渗透）工艺比较：现有反渗透处理垃圾渗滤液工程，反渗透一般采用二级反渗透，膜组件使用量大，投资在工程总投资中占较大份额，运行维护费用也较高。本发明因有MBR，氨吹脱等预处理，污染物大部分已得到去除，采用一级反渗透即可达到出水要求，可节约反渗透膜投资。 4. Compared with the disc-tube reverse osmosis (DT-RO reverse osmosis) process: the existing reverse osmosis treatment landfill leachate project, reverse osmosis generally adopts two-stage reverse osmosis, the use of membrane modules is large, and the investment accounts for the total investment of the project. The larger the share, the higher the operation and maintenance costs. Due to the MBR, ammonia blow-off and other pretreatments in the present invention, most of the pollutants have been removed, and the water outlet requirement can be met by using one-stage reverse osmosis, which can save investment in reverse osmosis membranes.
下面，结合实施例对本发明之一种垃圾渗滤液处理工艺的技术特征作进一步的说明。 Below, the technical features of a landfill leachate treatment process of the present invention will be further described in conjunction with examples.
附图说明 Description of drawings
图1：本发明实施例一之垃圾渗滤液处理工艺流程图。 Fig. 1: Flow chart of landfill leachate treatment process according to Embodiment 1 of the present invention.
具体实施方式 Detailed ways
实施例一： Embodiment one:
一种垃圾渗滤液处理工艺（参见图1），包括以下步骤， A landfill leachate treatment process (see Figure 1), comprising the following steps,
（1）将垃圾渗滤液收集汇入调节池，调节池水力停留时间（HRT）≥90天，以对渗滤液水质水量进行有效调节； (1) The landfill leachate is collected and poured into the adjustment tank, and the hydraulic retention time (HRT) of the adjustment tank is ≥ 90 days to effectively adjust the water quality and quantity of the leachate;
（2）调节池出水提升进入氨吹脱反应器，主要去除大量游离氨，所述的氨吹脱反应器为氨吹脱塔，氨吹脱工艺采用空气吹脱，调节池出水首先经提升泵，泵入pH调节池，调节pH至9～11，通过竖流式沉淀池去除沉淀，沉淀时间2h左右，沉淀池出水泵入氨吹脱塔去除游离氨氮，氨吹脱塔为填料塔或折流板塔，吹脱时上进水，下部曝气，气水比5000：1，吹脱后尾气进入吸收塔去除； (2) The effluent from the regulating tank is lifted into the ammonia blow-off reactor to remove a large amount of free ammonia. The ammonia blow-off reactor is an ammonia blow-off tower, and the ammonia blow-off process adopts air blow-off. , pump into the pH adjustment tank, adjust the pH to 9-11, remove the sediment through the vertical flow sedimentation tank, the sedimentation time is about 2 hours, pump the effluent from the sedimentation tank into the ammonia stripping tower to remove free ammonia nitrogen, the ammonia stripping tower is a packed tower or folding tower Flow plate tower, when blowing off, the upper part is fed with water, and the lower part is aerated.
（3）垃圾渗滤液经氨吹脱后进行混凝沉淀处理，混凝剂为聚合氯化铝或聚合硫酸铁，混凝剂添加量为100mg/L～800mg/L，沉淀时间2h左右，以进一步去除渗滤液中的SS、胶体粒子、少量COD及金属； (3) The landfill leachate is subjected to coagulation and precipitation treatment after being blown off by ammonia. The coagulant is polyaluminum chloride or polyferric sulfate. The amount of coagulant added is 100mg/L-800mg/L. Further remove SS, colloidal particles, a small amount of COD and metals in the leachate;
（4）混凝沉淀出水进入厌氧反应器进行厌氧处理，降低垃圾渗滤液中COD，所述的厌氧反应器为UASB，上部设三相分离器，在厌氧反应器中HRT不小于70h； (4) The coagulation and sediment effluent enters the anaerobic reactor for anaerobic treatment to reduce the COD in the landfill leachate. The anaerobic reactor is UASB, and the upper part is equipped with a three-phase separator. The HRT in the anaerobic reactor is not less than 70h;
（5）厌氧反应器出水依次进入缺氧池、好氧池和MBR反应池，所述的MBR反应池至缺氧池有混合液回流，反应池中使用的膜组件为平板MBR膜组件，MBR形式为淹没式；缺氧池、好氧池和MBR反应池是主要的生化处理单元，渗滤液在缺氧池即反硝化（A）池内主要进行反硝化脱氮，在好氧池即硝化（O）池和MBR反应池主要进行有机物和有机氮、氨氮的去除，通过MBR池和A池之间的混合液回流去除总氮； (5) The effluent from the anaerobic reactor enters the anoxic pool, the aerobic pool and the MBR reaction pool in turn. The mixed liquid flows back from the MBR reaction pool to the anoxic pool. The membrane modules used in the reaction pools are flat MBR membrane modules. The form of MBR is submerged; the anoxic pool, the aerobic pool and the MBR reaction pool are the main biochemical treatment units. The leachate is mainly denitrified and denitrified in the anoxic pool (denitrification (A) pool), and is nitrified in the aerobic pool. The (O) pool and the MBR reaction pool are mainly used for the removal of organic matter, organic nitrogen, and ammonia nitrogen, and the total nitrogen is removed through the reflux of the mixed solution between the MBR pool and the A pool;
所述好氧池分4格，穿孔墙连接，最后一格为MBR反应池，放置MBR膜组件，所述的好氧池和MBR反应池内曝气采用鼓风曝气，缺氧池通过潜水搅拌方式防止泥沉积， The aerobic pool is divided into 4 grids, which are connected by perforated walls. The last grid is the MBR reaction tank, where the MBR membrane module is placed. The aeration in the aerobic tank and the MBR reaction tank adopts blast aeration, and the anoxic tank is stirred by diving. way to prevent mud deposits,
所述的厌氧反应器出水在缺氧池HRT不小于30h，在好氧池和MBR反应池HRT不小于60h，MBR反应池至缺氧池混合液回流比为3～5：1，所述的MBR反应池至缺氧池混合液回流比是指从MBR反应池回流至缺氧池的混合液流量与从厌氧反应器出水进入缺氧池的污水流量的比值，缺氧池、好氧池和MBR反应池污泥浓度维持在10000mg/L～15000mg/L，MBR反应池中使用的膜组件为平板MBR膜组件，该膜组件具有抗污染，易维护的特点，可以在高的污泥浓度下连续运行。在此工艺单元，由于膜的截流作用，能使污泥中含有丰富的硝化菌和反硝化菌，污泥浓度高，对污染物去除效率高，耐水力负荷冲击，因此，不需其他好氧生物处理单元，结构紧凑，占地面积小； The HRT of the anaerobic reactor effluent in the anoxic tank is not less than 30h, the HRT in the aerobic tank and the MBR reaction tank is not less than 60h, and the reflux ratio of the mixed solution from the MBR reaction tank to the anoxic tank is 3-5:1. The mixed liquid reflux ratio from the MBR reaction tank to the anoxic tank refers to the ratio of the mixed liquid flow rate from the MBR reaction tank to the anoxic tank and the sewage flow rate from the anaerobic reactor effluent into the anoxic tank. The sludge concentration in the tank and MBR reaction tank is maintained at 10000mg/L to 15000mg/L. The membrane module used in the MBR reaction tank is a flat MBR membrane module. Continuing operation at the concentration. In this process unit, due to the interception effect of the membrane, the sludge can contain rich nitrifying bacteria and denitrifying bacteria, the sludge concentration is high, the removal efficiency of pollutants is high, and the impact of hydraulic load is resistant. Therefore, no other aerobic bacteria are required. Biological treatment unit, compact structure, small footprint;
（6）MBR反应池出水进入反渗透系统，进一步去除COD、氨氮、盐度和色度，保证出水达标，处理后的出水直接排出，反渗透系统为一级反渗透，反渗透膜选卷式膜，一级两段，反渗透浓缩液回流至调节池，反渗透回收率75%； (6) The effluent from the MBR reaction tank enters the reverse osmosis system to further remove COD, ammonia nitrogen, salinity and chroma to ensure that the effluent reaches the standard, and the treated effluent is directly discharged. Membrane, one stage and two stages, the reverse osmosis concentrate is returned to the regulating tank, and the recovery rate of reverse osmosis is 75%;
（7）混凝沉淀污泥和生化处理单元污泥，进入污泥浓缩池，进一步用板框压滤机脱水后，送入填埋场填埋。 (7) Coagulation and sedimentation sludge and biochemical treatment unit sludge enter the sludge thickening tank, and after further dehydration by plate and frame filter press, they are sent to landfill for landfill.
本发明实施例不限于上述实施例，在不脱离本发明宗旨的前提下做的各种变化均属于本发明保护范围。 The embodiments of the present invention are not limited to the above-mentioned embodiments, and various changes made without departing from the gist of the present invention belong to the protection scope of the present invention.
本发明实施例一处理效果如下表所示： The first processing effect of the embodiment of the present invention is shown in the table below:
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| CN119430561A (en) * | 2024-12-09 | 2025-02-14 | 南京环保产业创新中心有限公司 | A method for comprehensive resource utilization of wastewater from long-chain dibasic acid microbial fermentation |
| CN119612863A (en) * | 2024-12-31 | 2025-03-14 | 江苏宇星科技有限公司 | Treatment method of wastewater in iron oxide pigment production process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219845A (en) * | 2008-01-28 | 2008-07-16 | 北京洁绿科技发展有限公司 | Technique for processing garbage leachate |
| CN100406399C (en) * | 2005-08-01 | 2008-07-30 | 陈昆柏 | A method and system for treating leachate in domestic waste landfill |
| CN101357812A (en) * | 2007-07-31 | 2009-02-04 | 深圳百斯特环保工程有限公司 | Processing method for domestic garbage leachate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406399C (en) * | 2005-08-01 | 2008-07-30 | 陈昆柏 | A method and system for treating leachate in domestic waste landfill |
| CN101357812A (en) * | 2007-07-31 | 2009-02-04 | 深圳百斯特环保工程有限公司 | Processing method for domestic garbage leachate |
| CN101219845A (en) * | 2008-01-28 | 2008-07-16 | 北京洁绿科技发展有限公司 | Technique for processing garbage leachate |
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