WO2018129896A1 - 一种针对污水处理厂尾水深度处理的人工湿地系统 - Google Patents

一种针对污水处理厂尾水深度处理的人工湿地系统 Download PDF

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WO2018129896A1
WO2018129896A1 PCT/CN2017/093357 CN2017093357W WO2018129896A1 WO 2018129896 A1 WO2018129896 A1 WO 2018129896A1 CN 2017093357 W CN2017093357 W CN 2017093357W WO 2018129896 A1 WO2018129896 A1 WO 2018129896A1
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Prior art keywords
water
pool
ecological pool
plant
ecological
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PCT/CN2017/093357
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English (en)
French (fr)
Inventor
宋海勇
彭立新
李伟奇
王永秀
张俊辉
雷志洪
林静
张冉
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深圳市碧园环保技术有限公司
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Publication of WO2018129896A1 publication Critical patent/WO2018129896A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/008—Mobile apparatus and plants, e.g. mounted on a vehicle
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2

Definitions

  • the invention relates to the field of advanced treatment of sewage, in particular to an artificial wetland system for deep treatment of tail water of a sewage treatment plant.
  • the discharge form of the tailwater of the urban sewage treatment plant in China is mainly concentrated discharge, and the self-purification ability of the river is used to further degrade the pollutants in the tail water to meet the water environment functional target of the receiving water body.
  • the tailwaters of most urban sewage plants have gradually lost their water environment functions.
  • many water plants have been unable to meet the existing requirements due to design reasons.
  • the on-site upgrades are difficult to upgrade and upgrade in the current conditions due to the limitations of the site and the original process. More and more sewage treatment plant tailwater advanced treatment projects have been planned and constructed.
  • the urban sewage treatment plant adopts mature technology, its organic matter removal ability is strong, the concentration of COD and BOD in the effluent is low, and the concentration of nitrogen and phosphorus in the effluent is relatively high, which becomes the focus of deep treatment.
  • the existing artificial wetland technology for the advanced treatment of tail water in sewage treatment plants is mostly based on the wetland structure, and the pollutant removal efficiency is improved by the combination of different types of wetlands, but the treatment efficiency of the constructed wetland sewage treatment system is still low, sewage treatment The carbon source of the tail water of the plant is insufficient, resulting in low efficiency of nitrogen removal.
  • the invention overcomes the defects that the treatment efficiency of the constructed wetland sewage treatment system in the prior art is low, the carbon source of the tail water of the sewage treatment plant is insufficient, and the denitrification efficiency is low, and the artificial treatment for the advanced treatment of the tail water of the sewage treatment plant is provided.
  • Wetland system Wetland system.
  • the technical solution adopted by the present invention for achieving the object of the invention is: an artificial wetland system for deep treatment of tail water of a sewage treatment plant, including a constructed wetland system, and an ecological pool system for pretreating sewage, the ecological pool system comprising A water distribution channel, an ecological pool and a water collecting channel, a microbial carrier filler mounting bracket is arranged in the ecological pool, and the microbial carrier filler is fixedly mounted on the microbial carrier packing mounting bracket, and the ecological pool is provided with a plant floating bed, and the plant floating bed is filled with water.
  • the water outlet end of the water distribution channel is connected with the water inlet end of the ecological pool, and the water outlet end of the ecological pool is connected with the water inlet end of the water collecting channel, and the lower water collecting perforated pipe is arranged in the pool of the artificial wetland from the bottom of the pool to the surface of the pool.
  • the gravel support layer, the pollutant adsorption layer, the sand filter layer, the upper perforated water distribution pipe and the water-generating plant 2 the water outlet end of the collecting channel is connected with the inlet end of the upper perforated water distribution pipe, and the lower collecting water perforating pipe is provided at one end Water nozzle.
  • the microbial carrier filler is a non-woven fabric.
  • the ecological pool is provided with a baffle wall, and the ecological pool is divided by the baffle wall into a multi-stage series cell structure.
  • the plant floating bed is composed of a set of floating body units.
  • the invention has the beneficial effects that the invention combines the use of the ecological pool and the constructed wetland system, thereby greatly improving the nitrogen and phosphorus removal efficiency of the sewage, and the total nitrogen removal rate can reach more than 50%, and the total phosphorus is compared with the conventional constructed wetland system.
  • the removal rate can reach more than 60%, and the area load of the constructed wetland can be increased to 1.5m 3 /m 2 ⁇ d, which greatly reduces the footprint of the constructed wetland.
  • the sewage of the invention uniformly enters the ecological pool through the water distribution channel, and the inflow of the ecological pool adopts a baffled flow mode, and the multi-stage baffle is fully contacted with the microbial carrier filler in the ecological pool, and the front end and the end of the influent are different due to the concentration of the pollutant. It can form different microbial structures, and the removal of pollutants is more targeted, which improves the efficiency of microbial action.
  • the plant roots of the plant floating bed on the surface of the ecological pool grow to the interior of the water body, which on the one hand improves the efficiency of pollutant removal.
  • the litter of the plants and the regular release of the plants after harvesting supplement the ecological pool with carbon sources.
  • the nitrate nitrogen is converted into nitrogen to achieve deep nitrogen removal.
  • the invention has no aeration equipment such as aeration, and the carbon source uses wetland plants, which greatly reduces the running cost and reduces the cost of the wetland plant transportation.
  • Figure 1 is a schematic view of the structure of the present invention.
  • 1 is a water distribution channel
  • 2 is an ecological pool
  • 3 is a microbial carrier packing mounting bracket
  • 4 is a microbial carrier filler
  • 5 is a baffle wall
  • 6 is a plant floating bed
  • 7 is a watering plant
  • 8 is a collecting channel.
  • 9 is a constructed wetland system
  • 10 is a lower water collecting perforated pipe
  • 11 is a gravel supporting layer
  • 12 is a pollutant adsorption layer
  • 13 is a sand filter layer
  • 14 is a watering plant 2
  • 15 is an upper layer perforated water distribution pipe.
  • an artificial wetland system for the advanced treatment of tail water in a sewage treatment plant of the present embodiment including a constructed wetland system 9, further includes an ecological pool system for pretreating sewage.
  • the ecological pool system includes a water distribution channel 1, an ecological pool 2, and a water collecting channel 8.
  • the pool of the ecological pool 2 adopts a reinforced concrete structure, and the pool body is square, at least divided into two grids in parallel, and each grid is not connected to each other, which is convenient for maintenance.
  • the microbial carrier packing mounting bracket 3 is arranged in the pool of the ecological pool 2, and the microbial carrier packing 4 is fixedly mounted on the microbial carrier packing mounting bracket 3, and the biofilm is formed on the surface of the microbial carrier filler 4, and the biofilm is mainly grown in anaerobic and anoxic conditions.
  • the denitrifying bacteria that grow underneath provide the necessary conditions for denitrification and denitrification.
  • the preferred microbial carrier filler 4 of the present embodiment is a non-woven fabric having a thickness of about 2 mm, the width can be adjusted according to the size of the pool of the ecological pool 2, the installation height is not more than 3 meters, the installation interval is not more than 1 meter, and the filler surface of the microbial carrier filler 4 In the direction of the incoming water, the surface of the microbial carrier filler 4 is rough, which is beneficial to the growth of microorganisms and zooplankton, and the surface can form a micro-ecological structure, which is beneficial to the removal of pollutants.
  • a preferred baffle wall 5 is provided in the ecological pond 2 of the present embodiment.
  • the baffle wall 5 is fixed under the ecological pool 2, and the height of the wall of the baffle wall 5 is high and the water outlet position is behind, and an opening is arranged below the wall of the baffle wall 5 to ensure the passage of water.
  • the ecological pool 2 is divided into a multi-stage series cell structure by the baffle wall 5, and the sewage flowing into the ecological pool 2 forms a water flow that is bucked up and down under the action of the baffle wall 5 to ensure sufficient contact between the sewage and the microbial carrier filler 4.
  • the water surface of the ecological pool 2 is provided with a plant floating bed 6.
  • the preferred plant floating bed 6 of this embodiment consists of a set of pontoon unit splicing.
  • the single floating body unit has an area of about 3 to 5 m 2 and is composed of an upper and lower protective steel plate and an intermediate foam floating body, and has a total thickness of about 10 to 15 cm. It is guaranteed to have a certain buoyancy while improving the mechanical strength. A flexible occlusion connection is used between the individual floating body units. Since the water level of the ecological pool 2 is small, there is basically no wind and wave. Plant floating bed 6 reserves plant planting holes, the size of the cavity is: 8 ⁇ 12cm in diameter, spacing 30 ⁇ 50cm. The plant floating bed 6 is planted with a water-producing plant-7, and the water-producing plant-7 includes a perennial herb that can be hydroponically grown, such as canna, windmill grass, and rich bamboo.
  • the root of the plant grows downward and penetrates into the water body of the pond. Under the action of root oxygen secretion, an aerobic biofilm is formed on the surface of the root system, and nitrification occurs to achieve the effect of removing ammonia nitrogen.
  • the growth of plants can absorb nutrients such as organic matter, nitrogen and phosphorus from sewage, and play a role in pollutant removal.
  • the litter and roots dropped during the growth process provide a carbon source to the water body. It can also be regularly harvested by plants, and plants are regularly added to the water in the pool to form a stable carbon source, thus ensuring the smooth progress of denitrification.
  • the nitrate nitrogen is converted to nitrogen to achieve deep denitrification.
  • the water outlet end of the water distribution channel 1 is connected to the water inlet end of the ecological pool 2, and the water outlet end of the ecological pool 2 is connected to the water inlet end of the water collection channel 8.
  • the constructed wetland is a downward vertical flow constructed wetland.
  • a lower water collecting perforated pipe 10, a gravel supporting layer 11, a pollutant adsorbing layer 12, a sand filter layer 13, an upper perforated water distribution pipe 15, and a water-repellent plant 2 are sequentially arranged from the bottom of the pool to the surface of the pool.
  • the total thickness of the filler layer formed by the sand filter layer 13, the pollutant adsorption layer 12, and the gravel support layer 11 is 1.2 m to 1.5 m.
  • the lower water collecting perforated pipe 10 is a UPVC drainage pipe, the pipe diameter is not less than DN350, the opening diameter is 10-15 mm, the spacing is 20 cm, and the opening direction is the 1st and a half direction and the 10:30 direction of the pipe section, and is staggered. Open the hole.
  • Crushed stone support layer 11 main material is granular
  • the crushed stone with a diameter of 20-40mm has a thickness of 20-40mm. It mainly supports the upper layer packing and protects the lower layer water collecting perforated pipe 10 to prevent the upper layer of fine packing from blocking the collecting hole of the pipe.
  • the main material of the pollutant adsorption layer 12 is the crushed ceramsite with a large specific surface area.
  • the thickness of the filler is 60-80 cm.
  • the ceramsite processing process adds calcium, magnesium, aluminum, iron and other metal elements with strong N and P adsorption capacity. It can greatly improve the adsorption efficiency of N and P in the system, and its particle size is 10-15mm.
  • the N and P adsorption layers are the growth layers of plant roots, and the absorption of roots can also improve the removal of system organic matter and N and P. effectiveness.
  • the main material of the sand filter layer 13 is coarse sand, the particle size is 0-5 mm, the thickness of the filler is 40-50 cm, and the mud content should be less than 10%.
  • the sand filter layer 13 mainly serves as an intercepting and filtering function, and removes particulate matter or fallen biofilm or fallen plant residues in the effluent of the ecological pool 2.
  • the upper perforated water distribution pipe 15 is a UPVC drainage pipe, the pipe diameter is not more than DN100, the opening diameter is 3 to 5 mm, the spacing is 20 cm, and the opening direction is the 1st and a half direction and the 10:30 direction of the pipe section, and the holes are staggered.
  • each section of the upper perforated water distribution pipe 15 is preferably less than 3 m, and the spacing between the pipes is 1.2 m to 2 m.
  • the upper perforated water distribution pipe 15 is installed above the sand filter layer 13 and ensures that the water outlet hole is not blocked by the coarse sand.
  • the water-producing plants 2 14 preferably select local plants suitable for the climatic conditions of the project site, and mainly include more than two kinds of perennial herbs such as canna, windmill grass, iris, re-flower, reed, reed, and spider berry.
  • the water outlet end of the water collecting channel 8 is connected to the water inlet end of the upper layer perforated water distribution pipe 15, and the water collecting port of the lower layer water collecting and perforating pipe 10 is provided with a water outlet, and the treated sewage is discharged along the water outlet end of the lower layer water collecting and perforating pipe 10.
  • the sewage enters the constructed wetland system through the catchment 8 and further treats the pollutants such as organic matter, nitrogen and phosphorus in the sewage through the synergistic action of the filler layer, microorganisms and plants in the constructed wetland. Finally, the lower layer of water is collected from the bottom. The perforated tube 10 is collected and discharged.
  • the denitrification and denitrification is realized by the ecological action of the pretreatment system, and the structure of the constructed wetland system and the optimization of the filler are used to improve the dephosphorization efficiency, and the effluent quality is achieved in the “Surface Water Environmental Quality Standard” (GB3838-2002). Class III to IV standards.

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Abstract

一种针对污水处理厂尾水深度处理的人工湿地系统，其包括对污水进行预处理的生态池系统，生态池系统包括配水渠（1）、生态池（2）和集水渠（8），生态池（2）池体内设有微生物载体填料安装支架（3），微生物载体填料（4）固定安装在微生物载体填料安装支架（3）上，生态池（2）的水面设有植物浮床（6），植物浮床（6）内种有挺水植物一（7），配水渠（1）的出水端与生态池（2）的进水端连接，生态池（2）的出水端与集水渠（8）的进水端连接，集水渠（8）的出水端与人工湿地系统（9）内的上层穿孔配水管（15）的进水端连接。

Description

一种针对污水处理厂尾水深度处理的人工湿地系统 技术领域
本发明涉及污水深度处理领域，尤其涉及一种针对污水处理厂尾水深度处理的人工湿地系统。
背景技术
我国城市污水厂达标尾水的排放形式主要为集中排放，并利用河流的自净能力对尾水中的污染物进一步降解，以满足受纳水体的水环境功能目标。但是随着城市化进程的加快，使得大多城市污水厂尾水受纳河流已经逐渐丧失水环境功能。为达到更高的排放标准，许多水厂由于设计原因，原有的处理单元已无法满足现有要求，场内升级改造由于场地和原工艺的限制，难以在现状条件进行升级改造，因此越来越多的污水处理厂尾水深度处理工程已开展规划建设。由于城市污水处理厂多采用成熟工艺，其有机物去除能力较强，出水中COD、BOD浓度低，而相对地表水环境质量，其出水氮、磷的浓度较高，成为深度处理中的重点。
现有的人工湿地用于污水处理厂尾水深度处理方面的技术多从湿地结构出发，通过不同类型湿地的组合，提高污染物去除效率，但依然存在人工湿地污水处理系统处理效率低，污水处理厂尾水的碳源不足，导致脱氮效率低等问题。
发明内容
本发明克服了现有技术中的人工湿地污水处理系统处理效率低，污水处理厂尾水的碳源不足，导致脱氮效率低的缺点，提供了一种针对污水处理厂尾水深度处理的人工湿地系统。
本发明实现发明目的采用的技术方案是：一种针对污水处理厂尾水深度处理的人工湿地系统，包括人工湿地系统，还包括对污水进行预处理的生态池系统，所述的生态池系统包括配水渠、生态池和集水渠，生态池池体内设有微生物载体填料安装支架，微生物载体填料固定安装在微生物载体填料安装支架上，生态池的水面设有植物浮床，植物浮床内种有挺水植物一，配水渠的出水端与生态池的进水端连接，生态池的出水端与集水渠的进水端连接，人工湿地的池内从池底至池面依次设有下层集水穿孔管、碎石承托层、污染物吸附层、砂滤层、上层穿孔配水管和挺水植物二，集水渠的出水端与上层穿孔配水管的进水端连接，下层集水穿孔管一端设有出水口。
进一步的，所述的微生物载体填料为无纺布。
进一步的，所述的生态池内设有折流墙，生态池被折流墙分隔成多级串联的池体结构。
进一步的，所述的植物浮床由一组浮体单元拼接组成。
本发明的有益效果是：与传统人工湿地系统相比，本发明通过生态池和人工湿地系统的组合使用，大大提高了污水脱氮除磷效率，总氮去除率可达到50％以上，总磷去除率可达60％以上，且人工湿地的面积负荷可提高至1.5m3/m2·d，大大减少了人工湿地的占地面积。
本发明的污水经配水渠均匀进入生态池，生态池进水采用折流式流动方式，经多级折流，与生态池内的微生物载体填料充分接触，进水前端和末端由于污染物浓度的不同，可形成不同的微生物结构，对污染物的去除更有针对性，提高了微生物的作用效率。同时，生态池水面的植物浮床的植物根系向水体内部生长，一方面提高了污染物去除效率，另一方面，植物的枯枝落叶以及收割后植物的定期投放，为生态池补充了碳源，保证了反硝化作用的顺利进行，将部 分硝态氮转化为氮气，实现深度脱氮。本发明没有曝气等动力设备，碳源采用湿地植物，大大降低了运行成本，同时减少了湿地植物外运处置的费用。
下面结合附图与具体实施方式对本发明作进一步的描述。
附图说明
图1为本发明的结构示意图。
附图中，1为配水渠、2为生态池、3为微生物载体填料安装支架、4为微生物载体填料、5为折流墙、6为植物浮床、7为挺水植物一、8为集水渠、9为人工湿地系统、10为下层集水穿孔管、11为碎石承托层、12为污染物吸附层、13为砂滤层、14为挺水植物二、15为上层穿孔配水管。
具体实施方式
如附图1所示，本实施例的一种针对污水处理厂尾水深度处理的人工湿地系统，包括人工湿地系统9，还包括对污水进行预处理的生态池系统。所述的生态池系统包括配水渠1、生态池2和集水渠8。生态池2池体采用钢筋混凝土结构，池体方形，至少分为并联的两格，每格间互不联通，方便检修。生态池2池体内设有微生物载体填料安装支架3，微生物载体填料4固定安装在微生物载体填料安装支架3上，微生物载体填料4表面形成生物膜，生物膜上主要生长在厌氧和缺氧条件下生长的反硝化细菌，为反硝化脱氮作用提供必要条件。本实施例优选的微生物载体填料4为无纺布，厚度约2mm，宽度可根据生态池2池体尺寸调整，安装高度不超过3米，安装间距不超过1米，微生物载体填料4的填料面迎向来水方向，微生物载体填料4的表面粗糙，有利于微生物及浮游动物附着生长，表面可形成微生态结构，有利于污染物的去除。为了便于污水与微生物载体填料4充分接触，本实施例优选的生态池2内设有折流墙5。折流墙5固定在生态池2的下方，折流墙5墙体高度高与后面的出水位，折流墙5 墙体下方设有开口，保证水流穿过。生态池2被折流墙5分隔成多级串联的池体结构，流入生态池2的污水在折流墙5的作用下形成上下折流的水流，保证污水与微生物载体填料4的充分接触。生态池2的水面设有植物浮床6。本实施例优选的植物浮床6由一组浮体单元拼接组成。单个浮体单元面积约3～5m2左右，由上下保护钢板和中间泡沫浮体组成，总厚度约10～15cm。保证具有一定浮力的同时，提高机械强度。单个浮体单元之间采用柔性咬合连接，由于生态池2水位变化小，基本无风浪。植物浮床6预留植物种植孔，空洞大小为：直径8～12cm，间距30～50cm。植物浮床6内种有挺水植物一7，挺水植物一7包括美人蕉、风车草、富贵竹等可水培生长的多年生草本植物，植物根系向下生长，深入池内水体。在根系泌氧作用下，根系表面形成好氧生物膜，发生硝化作用，达到去除氨氮的作用。植物的生长可从污水中吸收有机质、氮、磷等营养物质，起到污染物去除的作用。植物生长过程掉落的枯枝落叶及根系，向水体提供了碳源，也可通过植物定期收割，向池内水体定期投加植物，形成稳定碳源，从而保证反硝化作用的顺利进行，将部分硝态氮转化为氮气，实现深度脱氮。
配水渠1的出水端与生态池2的进水端连接，生态池2的出水端与集水渠8的进水端连接。
所述的人工湿地为下行垂直流人工湿地。人工湿地的池内从池底至池面依次设有下层集水穿孔管10、碎石承托层11、污染物吸附层12、砂滤层13、上层穿孔配水管15和挺水植物二14。砂滤层13、污染物吸附层12和碎石承托层11形成的填料层的总厚度为1.2m～1.5m。所述的下层集水穿孔管10为UPVC排水管，管径不小于DN350，开孔孔径为10-15mm，间距20cm，开孔方向为管道断面的1点半方向和10点半方向，并交错开孔。碎石承托层11主要材料为粒 径为20-40mm的碎石，厚度为20-40mm，主要起到承托上层填料，保护下层集水穿孔管10，防止上层较细填料堵塞管道收集孔的作用。污染物吸附层12主要材料为比表面积较大的破碎后的陶粒，填料厚度为60～80cm，陶粒加工过程添加钙、镁、铝、铁等具有较强N、P吸附能力的金属元素，可大大提高系统对N、P的吸附效率，其粒径为10-15mm，另一方面，N、P吸附层是植物须根生长层，根系的吸收也可提高系统有机物和N、P的去除效率。
砂滤层13主要材料为粗砂，粒径0-5mm，填料厚度为40～50cm，含泥量应小于10％。砂滤层13主要起到拦截、过滤作用，去除生态池2出水中的颗粒物或脱落的生物膜或掉落的植物残体等。上层穿孔配水管15为UPVC排水管，管径不超过DN100，开孔孔径为3～5mm，间距20cm，开孔方向为管道断面的1点半方向和10点半方向，并交错开孔。上层穿孔配水管15每段管道长度以小于3m为宜，管道之间间距1.2m～2m，上层穿孔配水管15安装在砂滤层13填料上方，并确保出水孔不被粗砂堵塞。所述的挺水植物二14优先选择适合项目所在地气候条件的本地植物，主要包括美人蕉、风车草、鸢尾、再力花、芦苇、花叶芦荻、蜘蛛兰等两种以上的多年生草本植物。
集水渠8的出水端与上层穿孔配水管15的进水端连接，下层集水穿孔管10一端设有出水口，处理后的污水沿下层集水穿孔管10的出水端排出。
实际使用时，包括以下步骤：
(1)、污水经配水渠1向生态池2均匀配水；
(2)、污水经步骤(1)均匀配水进入生态池2，生态池2维持缺氧或厌氧状态，溶解氧浓度不超过2mg/L，有利于反硝化作用的进行；
(3)生态池2内的微生物、植物的协同作用，对污水中的有机物、氮、磷等污染物进行处理；
(4)、经步骤(3)处理后的污水进入集水渠8；
(5)污水经集水渠8进入人工湿地系统，通过人工湿地中的填料层、微生物、植物的协同作用对污水中的有机物、氮、磷等污染物进一步处理，最后，由底部的下层集水穿孔管10收集后排出。
本实施例利用预处理系统的生态作用实现反硝化脱氮，通过人工湿地系统的结构和填料的优化，提高除磷效率，实现出水水质达到《地表水环境质量标准》(GB3838-2002)中的Ⅲ～Ⅳ类标准。

Claims (4)

  1. 一种针对污水处理厂尾水深度处理的人工湿地系统，包括人工湿地系统，其特征在于，还包括对污水进行预处理的生态池系统，所述的生态池系统包括配水渠(1)、生态池(2)和集水渠(8)，生态池(2)池体内设有微生物载体填料安装支架(3)，微生物载体填料(4)固定安装在微生物载体填料安装支架(3)上，生态池(2)的水面设有植物浮床(6)，植物浮床(6)内种有挺水植物一(7)，配水渠(1)的出水端与生态池(2)的进水端连接，生态池(2)的出水端与集水渠(8)的进水端连接，人工湿地的池内从池底至池面依次设有下层集水穿孔管(10)、碎石承托层(10)、污染物吸附层(12)、砂滤层(13)、上层穿孔配水管(15)和挺水植物二(14)，集水渠(8)的出水端与上层穿孔配水管(15)的进水端连接，下层集水穿孔管(10)一端设有出水口。
  2. 根据权利要求1所述的一种针对污水处理厂尾水深度处理的人工湿地系统，其特征在于，所述的微生物载体填料(4)为无纺布。
  3. 根据权利要求1或2所述的一种针对污水处理厂尾水深度处理的人工湿地系统，其特征在于，所述的生态池(2)内设有折流墙(5)，生态池(2)被折流墙(5)分隔成多级串联的池体结构。
  4. 根据权利要求1所述的一种针对污水处理厂尾水深度处理的人工湿地系统，其特征在于，所述的植物浮床(6)由一组浮体单元拼接组成。
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