CN105036343B - Efficiently remove the ecological engineering of lipotropy trace organic substance in low-pollution water - Google Patents
Efficiently remove the ecological engineering of lipotropy trace organic substance in low-pollution water Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
本发明公开了一种高效去除低污染水中亲脂性痕量有机物的生态工程方法，按照水流流向依次设置高密度微细藻类池、水耕植物过滤床和潜流人工湿地，高密度微细藻类池内设有悬浮藻类层，水耕植物过滤床中设有水生植物层，潜流人工湿地分为潜流人工湿地前区和潜流人工湿地后区，潜流人工湿地前区和潜流人工湿地后区均依次自上而下设置湿地植物层、土壤层、火山岩层和煤渣层；待处理污水依次流经高密度微细藻类池、水耕植物过滤床、潜流人工湿地前区和潜流人工湿地后区进行处理。本发明综合了高密度微细藻类池，水耕植物过滤床和潜流人工湿地的工艺特点，可显著提高生态工程技术对低污染水中亲脂性痕量有机污染物的去除效率。
The invention discloses an ecological engineering method for efficiently removing lipophilic trace organic matter in low-pollution water. A high-density microalgae pool, a hydroponic plant filter bed, and an underflow artificial wetland are arranged in sequence according to the flow direction of the water flow. The high-density microalgae pool is provided with suspended The algae layer and the hydroponic plant filter bed are equipped with a layer of aquatic plants. The subsurface constructed wetland is divided into the front area of the subsurface constructed wetland and the rear area of the subsurface constructed wetland. Wetland plant layer, soil layer, volcanic rock layer and cinder layer; sewage to be treated sequentially flows through high-density microalgae pool, hydroponic plant filter bed, subsurface flow constructed wetland front area and subsurface flow constructed wetland rear area for treatment. The invention integrates the technical characteristics of high-density fine algae pool, hydroponic plant filter bed and subsurface artificial wetland, and can significantly improve the removal efficiency of lipophilic trace organic pollutants in low-pollution water by ecological engineering technology.
Description
技术领域technical field
本发明属于环境工程污水处理技术领域，具体涉及一种高效去除低污染水中亲脂性痕量有机物的生态工程方法。The invention belongs to the technical field of environmental engineering sewage treatment, and in particular relates to an ecological engineering method for efficiently removing lipophilic trace organic matter in low-pollution water.
背景技术Background technique
当前，我国许多河流都存在低污染现象，低污染水体涉及范围广，发生机制十分复杂。一些微量和痕量的亲脂性有机污染物进入水体污染水源，而这些亲脂性有机污染物浓度甚微，反映在COD，BOD5等常规指标上微不足道，但其毒性甚大，是致癌、致畸和致突变的物质，对人体伤害极大。常规的水环境物理化学方法处理低污染水的后续问题多、价格昂贵，至今没有经济有效的治理技术。At present, many rivers in our country have low-pollution phenomena, which involve a wide range of low-pollution water bodies, and the mechanism of occurrence is very complicated. Some micro and trace amounts of lipophilic organic pollutants enter the water body to pollute water sources, and the concentration of these lipophilic organic pollutants is very small, which is insignificant reflected in conventional indicators such as COD and BOD 5 , but its toxicity is very high, and it is carcinogenic, teratogenic and Mutagenic substances that are extremely harmful to the human body. Conventional physical and chemical methods for water environment have many follow-up problems and are expensive to deal with low-pollution water. So far, there is no economical and effective treatment technology.
高密度微细藻类池是一种深度较浅，高密度分布藻类，内置潜水推进器的一种特殊稳定塘。通过强化藻类和细菌之间的相互作用，使得它比一般稳定塘拥有更加丰富的生物相，从而对COD，氨氮和磷有着较好的去除效果。The high-density microalgae pool is a special stable pond with shallow depth, high-density distribution of algae, and built-in submersible propeller. By strengthening the interaction between algae and bacteria, it has a richer biological phase than ordinary stable ponds, so it has a better removal effect on COD, ammonia nitrogen and phosphorus.
水耕植物过滤床通过选择茎秆或根系发达的水生植物来高效地将水中的悬浮性污染物、藻类等过滤去除。然后由微生物对形成的污泥堆积物中的有机物、藻类及藻毒素进行生物降解去除，是一个由水生植物、水生动物及微生物构成的高效生态净化系统。The hydroponic plant filter bed efficiently removes suspended pollutants and algae in the water by selecting aquatic plants with well-developed stalks or root systems. Then the microorganisms biodegrade and remove the organic matter, algae and algae toxins in the formed sludge deposits. It is an efficient ecological purification system composed of aquatic plants, aquatic animals and microorganisms.
潜流人工湿地是以挺水植物为表面绿化物，以煤渣土壤等为填料，让水自然渗透过滤的人造景观。它具有无表面水、占地面积小、使用率高和维护方便等特点。Subsurface constructed wetland is a man-made landscape with emergent plants as surface greening and cinder soil as filler to allow water to infiltrate and filter naturally. It has the characteristics of no surface water, small footprint, high utilization rate and convenient maintenance.
单独使用上述三种生态工程技术时，只能对COD、氮、磷等有较好的去除效果，因此需要探索如何将它们有机耦合，充分发挥各自的特长，提高对亲脂性痕量有机物的去除效能，目前国内外尚未见此方面的报道。When the above three ecological engineering technologies are used alone, they can only have a good removal effect on COD, nitrogen, phosphorus, etc., so it is necessary to explore how to organically couple them, give full play to their respective strengths, and improve the removal of lipophilic trace organic matter Efficacy, there is no report in this area at home and abroad.
发明内容Contents of the invention
发明目的：本发明的目的是将高密度微细藻类池、水耕植物过滤床和潜流人工湿地有机耦合，提供一种高效去除低污染水中亲脂性痕量有机物的生态工程方法，强化生态工程技术对水体中亲脂性痕量有机物的去除作用。Purpose of the invention: The purpose of the invention is to organically couple high-density microalgae ponds, hydroponic plant filter beds and subsurface flow constructed wetlands, to provide an ecological engineering method for efficiently removing lipophilic trace organic matter in low-pollution water, and to strengthen ecological engineering technology. Removal of lipophilic trace organics in water bodies.
为了实现上述目的，本发明采用了如下的技术方案：一种高效去除低污染水中亲脂性痕量有机物的生态工程方法，按照水流流向依次设置高密度微细藻类池、水耕植物过滤床和潜流人工湿地，在高密度微细藻类池前端设有进水分配池，进水分配池与高密度微细藻类池之间设有前段出水口，高密度微细藻类池内设有悬浮藻类层，悬浮藻类层中放置潜水推进器，潜流人工湿地与水耕植物过滤床之间设有中段配水池，水耕植物过滤床与中段配水池之间设有后段出水口，中段配水池和潜流人工湿地之间设有透水墙，潜流人工湿地分为潜流人工湿地前区和潜流人工湿地后区，潜流人工湿地前区和潜流人工湿地后区之间设有水力分配槽，潜流人工湿地前区和潜流人工湿地后区均依次自上而下设置湿地植物层、土壤层、火山岩层和煤渣层，潜流人工湿地后区尾端设有排水口；进水分配池内的待处理污水依次流经高密度微细藻类池、水耕植物过滤床、潜流人工湿地前区和潜流人工湿地后区进行处理，处理过的水经过潜流人工湿地后区上方的排水口排出。In order to achieve the above object, the present invention adopts the following technical scheme: an ecological engineering method for efficiently removing lipophilic trace organic matter in low-pollution water, in which high-density microalgae ponds, hydroponic plant filter beds and subsurface flow artificial In wetlands, a water inlet distribution pool is provided at the front end of the high-density microalgae pool, and a front outlet is provided between the water intake distribution pool and the high-density microalgae pool. The high-density microalgae pool is provided with a suspended algae layer, and a diving Propeller, there is a middle water distribution pool between the submerged flow artificial wetland and the hydroponic plant filter bed, a rear water outlet is set between the hydroponic plant filter bed and the middle water distribution pool, and a permeable water outlet is set between the middle water distribution pool and the subsurface flow artificial wetland The subsurface flow constructed wetland is divided into the front area of the subsurface flow constructed wetland and the rear area of the subsurface flow constructed wetland. There is a hydraulic distribution tank between the front area of the subsurface flow constructed wetland and the rear area of the subsurface flow constructed wetland. The wetland plant layer, soil layer, volcanic rock layer and cinder layer are set up in sequence from top to bottom, and a drainage port is set at the rear end of the subsurface flow artificial wetland; the sewage to be treated in the water distribution pool flows through the high-density microalgae pool, hydroponic tank in turn The plant filter bed, the front area of the subsurface flow constructed wetland and the back area of the subsurface flow constructed wetland are treated, and the treated water is discharged through the outlet above the back area of the subsurface flow constructed wetland.
进一步的，所述高密度微细藻类池的水力停留时间为6～8h，悬浮藻类层的深度为30～40cm。Further, the hydraulic retention time of the high-density microalgae pond is 6-8 hours, and the depth of the suspended algae layer is 30-40 cm.
进一步的，所述悬浮藻类层采用颤藻、鱼腥藻或抗形席藻。Further, the suspended algae layer adopts oscillating algae, anabaena or anti-shaped matting algae.
进一步的，所述水耕植物过滤床的表面水力负荷为3～3.5m3/(m2.d)，滤床主体有效水深为10～12cm，超高为5cm。Further, the surface hydraulic load of the hydroponic plant filter bed is 3-3.5m 3 /(m 2 .d), the effective water depth of the main body of the filter bed is 10-12cm, and the super height is 5cm.
进一步的，所述水生植物层按照季节进行种植，夏秋季节种植水雍菜或聚草，冬春季节种植水芹菜或铜钱草。Further, the aquatic plant layer is planted according to the seasons, water celery or polygrass are planted in summer and autumn, and water celery or copper money grass are planted in winter and spring.
进一步的，所述潜流人工湿地的表面水力负荷为为0.8～1.0m3/(m2.d)，土壤层的厚度为15～25cm，火山岩层的厚度为15～25cm，煤渣层的厚度为15～25cm。Further, the surface hydraulic load of the subsurface constructed wetland is 0.8-1.0m 3 /(m 2 .d), the thickness of the soil layer is 15-25cm, the thickness of the volcanic rock layer is 15-25cm, and the thickness of the cinder layer is 15-25cm.
进一步的，所述湿地植物层采用芦竹或者菖蒲，土壤层采用黄棕壤，火山岩层火山岩粒径为2～4mm，煤渣层的煤渣粒径为5～10mm。Further, the wetland plant layer is made of reed bamboo or calamus, the soil layer is made of yellow brown soil, the particle size of the volcanic rock in the volcanic rock layer is 2-4 mm, and the particle size of the cinder in the cinder layer is 5-10 mm.
有益效果：1)本发明综合了高密度微细藻类池，水耕植物过滤床和潜流人工湿地的工艺特点，提高了污染物的去除效率。2)本发明合理利用了微细藻类对亲脂性痕量有机物的吸收固定作用，将痕量有机物吸收固定在藻细胞中，然后通过水生植物致密的根系和湿地填料对藻类的过滤拦截作用，在截留藻类的同时，也将痕量有机物从水中分离出来，进入底泥中。3)本发明前端设置了高密度微细藻类池和水耕植物过滤床的组合，可以使得污水得到更有效的净化，减小了后续潜流人工湿地的污水处理负荷。4)在潜流人工湿地中，污水在水力分配槽通过气体分子扩散复氧，一定程度上缓解了缺氧状态。水力分配槽能防止短流现象，有效调节湿地各区水位，加强污水湍流以及与填料的充分接触。5)利用植物高密度根系的强大拦截能力去除水中悬浮物，效率高，不易堵塞，便于维护管理。6)本发明较之同类工艺，土地使用面积更小，对污染物质的去除效率更高。7)水耕植物过滤床还可以生产出具有很高经济价值的水生蔬菜，对定期清除的底泥进行堆肥发酵处理还可以收获高效的有机肥，达到资源的可循环利用。Beneficial effects: 1) The present invention integrates the technical features of high-density fine algae pool, hydroponic plant filter bed and subsurface constructed wetland, and improves the removal efficiency of pollutants. 2) The present invention rationally utilizes the absorption and fixation of microalgae to lipophilic trace organics, absorbs and fixes trace organics in algae cells, and then filters and intercepts algae through the dense roots of aquatic plants and wetland fillers. At the same time as the algae, trace organic matter is also separated from the water and enters the sediment. 3) The front end of the present invention is equipped with a combination of a high-density microalgae pool and a hydroponic plant filter bed, which can purify the sewage more effectively and reduce the sewage treatment load of the subsequent subsurface flow constructed wetland. 4) In the subsurface constructed wetland, the sewage is re-oxygenated through the diffusion of gas molecules in the hydraulic distribution tank, which alleviates the anoxic state to a certain extent. The hydraulic distribution tank can prevent short flow, effectively adjust the water level in various areas of the wetland, strengthen the turbulent flow of sewage and fully contact with the filler. 5) Use the strong interception ability of the high-density root system of plants to remove suspended solids in water, with high efficiency, not easy to block, and easy to maintain and manage. 6) Compared with similar processes, the present invention has smaller land use area and higher removal efficiency of pollutants. 7) The hydroponic plant filter bed can also produce aquatic vegetables with high economic value, and the composting and fermentation treatment of the regularly removed sediment can also harvest high-efficiency organic fertilizers to achieve the recycling of resources.
附图说明Description of drawings
图1为本发明生态工程方法的工艺布置立面图；Fig. 1 is the technological arrangement elevation view of ecological engineering method of the present invention;
图2为本发明生态工程方法的工艺布置俯视图。Fig. 2 is a top view of the technological arrangement of the ecological engineering method of the present invention.
图3为本发明生态工程方法之中透水墙的剖面图。Fig. 3 is a sectional view of a permeable wall in the ecological engineering method of the present invention.
图中：1-进水分配池，2-前段出水口，3-潜水推进器，4-悬浮藻类层，5-中段出水口，6-水生植物层，7-后段出水口，8-中段配水池，9-透水墙，10-土壤层，11-火山岩层，12-煤渣层，13-湿地植物层，14-水力分配槽，15-排水口。In the figure: 1-water distribution pool, 2-front water outlet, 3-submersible propeller, 4-suspended algae layer, 5-middle water outlet, 6-aquatic plant layer, 7-rear water outlet, 8-middle Distribution pool, 9-permeable wall, 10-soil layer, 11-volcanic rock layer, 12-cinder layer, 13-wetland plant layer, 14-hydraulic distribution tank, 15-outlet.
具体实施方式：detailed description:
下面结合附图对本发明做更进一步的解释。The present invention will be further explained below in conjunction with the accompanying drawings.
如图1和2所示，本发明高效去除低污染水中亲脂性痕量有机物的生态工程方法是：按照水流流向依次设置高密度微细藻类池、水耕植物过滤床和潜流人工湿地，在高密度微细藻类池前端设有进水分配池1，进水分配池1与高密度微细藻类池之间设有前段出水口2，高密度微细藻类池内设有悬浮藻类层4，悬浮藻类层4中放置两个潜水推进器3，水耕植物过滤床与高密度微细藻类池之间设有中段出水口5，水耕植物过滤床中设有水生植物层6，潜流人工湿地与水耕植物过滤床之间设有中段配水池8，水耕植物过滤床与中段配水池8之间设有后段出水口7，中段配水池8和潜流人工湿地之间设有透水墙9，潜流人工湿地分为潜流人工湿地前区和潜流人工湿地后区，潜流人工湿地前区和潜流人工湿地后区之间设有砖砌的水力分配槽14，潜流人工湿地前区和潜流人工湿地后区均依次自上而下设置湿地植物层13、土壤层10、火山岩层11和煤渣层12，潜流人工湿地后区尾端设有排水口15；进水分配池内的待处理污水依次流经高密度微细藻类池、水耕植物过滤床潜流人工湿地前区和潜流人工湿地后区进行处理，处理过的水经过潜流人工湿地后区上方的排水口15排出。As shown in Figures 1 and 2, the ecological engineering method for efficiently removing lipophilic trace organic matter in low-pollution water of the present invention is: according to the flow direction of the water, a high-density microalgae pool, a hydroponic plant filter bed and a subsurface constructed wetland are arranged in sequence. A water inlet distribution pool 1 is provided at the front end of the microalgae pool, and a front outlet 2 is provided between the water inlet distribution pool 1 and the high-density microalgae pool. A suspended algae layer 4 is arranged in the high-density microalgae pool, and two A submersible propeller 3, a middle water outlet 5 is provided between the hydroponic plant filter bed and the high-density microalgae pool, an aquatic plant layer 6 is provided in the hydroponic plant filter bed, and a subsurface constructed wetland and the hydroponic plant filter bed are provided. There is a middle water distribution pool 8, a rear water outlet 7 is set between the hydroponic plant filter bed and the middle water distribution pool 8, a permeable wall 9 is set between the middle water distribution pool 8 and the subsurface constructed wetland, and the subsurface constructed wetland is divided into subsurface constructed wetlands The front area and the back area of the subsurface constructed wetland, and the brick hydraulic distribution tank 14 is set between the front area of the subsurface constructed wetland and the back area of the subsurface constructed wetland, and the front area of the subsurface constructed wetland and the back area of the subsurface constructed wetland are arranged sequentially from top to bottom The wetland plant layer 13, the soil layer 10, the volcanic rock layer 11 and the cinder layer 12, and the rear end of the subsurface flow constructed wetland is provided with a drainage outlet 15; the sewage to be treated in the water distribution pool flows through the high-density microalgae pool, hydroponic plants in sequence The filter bed is treated in the front area of the subsurface constructed wetland and the rear area of the subsurface constructed wetland, and the treated water is discharged through the outlet 15 above the rear area of the subsurface constructed wetland.
本发明中，所述高密度微细藻类池的水力停留时间为6～8h，悬浮藻类层4的深度为30～40cm，悬浮藻类层4采用颤藻、鱼腥藻或抗形席藻；所述水耕植物过滤床的表面水力负荷为3～3.5m3/(m2.d)，滤床主体有效水深为10～12cm，超高为5cm，滤床主体总深度15～17cm，所述水生植物层6按照季节进行种植，夏秋季节种植水雍菜或聚草，冬春季节种植水芹菜或铜钱草；所述潜流人工湿地的表面水力负荷为0.8～1.0m3/(m2.d)，所述湿地植物层13采用芦竹或者菖蒲，所述土壤层10采用黄棕壤，厚度为15～25cm，所述火山岩层11的火山岩粒径为2～4mm，厚度为15～25cm，所述煤渣层12的煤渣粒径为5～10mm，厚度为15～25cm。In the present invention, the hydraulic retention time of the high-density microalgae pool is 6 to 8 hours, the depth of the suspended algae layer 4 is 30 to 40 cm, and the suspended algae layer 4 adopts Oscillator algae, Anabaena or anti-form algae; The surface hydraulic load of the hydroponic plant filter bed is 3-3.5m 3 /(m 2 .d), the effective water depth of the main body of the filter bed is 10-12cm, the super height is 5cm, and the total depth of the main body of the filter bed is 15-17cm. The plant layer 6 is planted according to the seasons, water celery or polygrass is planted in summer and autumn, and water celery or copper money grass is planted in winter and spring; the surface hydraulic load of the subsurface constructed wetland is 0.8-1.0m 3 /(m 2 .d) , the wetland plant layer 13 adopts reed bamboo or calamus, the soil layer 10 adopts yellow brown soil with a thickness of 15-25 cm, the volcanic rock particle size of the volcanic rock layer 11 is 2-4 mm, and the thickness is 15-25 cm. The cinder particle size of the cinder layer 12 is 5-10mm, and the thickness is 15-25cm.
本发明的高效去除低污染水中亲脂性痕量有机物的生态工程方法中，低污染水进入高密度微细藻类池后，因为藻类的细胞壁和细胞膜上含有大量脂质物质，容易作为有机相来富集低污染水中的亲脂性痕量有机物。藻类在生长过程中，迅速吸收亲脂性有机物,从而达到去除低污染水亲脂性痕量有机物的目的。池中的潜水推进器可以促进污水的完全混合、调节塘内氧和CO2的浓度、均衡塘内水温以及促进藻类对亲脂性有机物的吸收，使这些亲脂性痕量有机物从溶解态存在形式转变为悬浮态存在形式。水耕植物过滤床的水雍菜和水芹菜等拥有致密的根系，能像滤网一样对藻类和其它悬浮物质起物理截留作用，水生植物根系的表面生物膜对这些物质进行的吸附固定、根系间隙的活性生物絮体的生物絮凝和水中浮游生长的原生动物、后生动物对藻类的捕食作用等，都大大降低了水中藻类及其它悬浮物质的含量,所以水耕植物过滤床能高效去除藻类。藻类密度非常低的污水再通过潜流人工湿地,经过黄棕壤、火山岩和煤渣这些填料层的物理吸附作用，对水中非常稀少的悬浮物质再次过滤，使水中剩余杂质得到高效去除,能切实保障最终出水的优良水质。同时，污水在水力分配槽14中通过气体分子扩散复氧，一定程度上缓解了缺氧状态，又防止短流现象，有效调节湿地各区水位，加剧污水湍流以及与填料的充分接触。In the ecological engineering method for efficiently removing lipophilic trace organic matter in low-pollution water of the present invention, after low-pollution water enters the high-density microalgae pool, because the cell wall and cell membrane of the algae contain a large amount of lipid substances, it is easy to enrich as an organic phase Lipophilic trace organics in low polluted water. During the growth process, algae quickly absorb lipophilic organic matter, so as to achieve the purpose of removing lipophilic trace organic matter in low-pollution water. The submersible propeller in the pool can promote the complete mixing of sewage, adjust the concentration of oxygen and CO2 in the pond, balance the water temperature in the pond, and promote the absorption of lipophilic organic matter by algae, so that these lipophilic trace organic matter can be changed from a dissolved state to a suspended state. form of existence. Hydroponic plant filter beds such as water celery and water celery have dense root systems, which can physically intercept algae and other suspended substances like a filter. The surface biofilm of aquatic plant roots can adsorb and fix these substances, and the root system The biological flocculation of active biological flocs in the gaps and the predation of protozoa and metazoans in the water by planktonic growth on algae have greatly reduced the content of algae and other suspended substances in the water, so the hydroponic plant filter bed can efficiently remove algae. The sewage with very low algae density passes through the subsurface artificial wetland, and through the physical adsorption of the filler layers such as yellow brown soil, volcanic rock and cinder, the very rare suspended matter in the water is filtered again, so that the remaining impurities in the water can be efficiently removed, which can effectively guarantee the final Excellent water quality of the effluent. At the same time, the sewage is re-oxygenated through the diffusion of gas molecules in the hydraulic distribution tank 14, which alleviates the anoxic state to a certain extent, prevents short-flow phenomenon, effectively adjusts the water level in various areas of the wetland, and intensifies the turbulent flow of sewage and the full contact with the filler.
本发明中的高密度微细藻类池、水耕植物过滤床和潜流人工湿地主要包括人工基质和植物，人工构造形成由不同基质、植物、多种微生物构成的具有特定生态学意义的水质净化系统。可以利用基质、植物和微生物以及它们的综合作用多途径的去除污染物，净化水质。该系统中的悬浮藻类可以直接迅速的吸收低污染水中亲脂性痕量有机物，使污染物从溶解态转变为悬浮态。而且,悬浮藻类的代谢产物可促进亲脂性痕量有机物在水中的光降解作用。水耕植物过滤床中水生植物的根系对藻类有截留作用,然后通过定期清除水耕植物过滤床的积泥,将大部分有机物及营养物质移出水体，形成一个由水生植物、水生动物及微生物构成的高效生态净化系统。另外，人工湿地中比表面积大，孔隙率高的湿地填料对污染物和藻类的吸附率很高，可以利用廉价易得的湿地填料对水中剩余悬浮性杂质进行吸附过滤去除。The high-density microalgae pool, hydroponic plant filter bed and subsurface constructed wetland in the present invention mainly include artificial substrates and plants, and the artificial structure forms a water purification system with specific ecological significance composed of different substrates, plants, and various microorganisms. The substrate, plants and microorganisms and their comprehensive effects can be used to remove pollutants and purify water quality in multiple ways. The suspended algae in the system can directly and rapidly absorb lipophilic trace organic matter in low-pollution water, so that the pollutants can be changed from dissolved state to suspended state. Moreover, the metabolites of suspended algae can promote the photodegradation of lipophilic trace organics in water. The root system of aquatic plants in the hydroponic plant filter bed has an interception effect on algae, and then by regularly removing the mud accumulated in the hydroponic plant filter bed, most of the organic matter and nutrients are removed from the water body to form a system composed of aquatic plants, aquatic animals and microorganisms. efficient ecological purification system. In addition, wetland fillers with large specific surface area and high porosity in constructed wetlands have a high adsorption rate for pollutants and algae, and cheap and easy-to-obtain wetland fillers can be used to adsorb and filter remaining suspended impurities in water.
综上所述，本发明采用不同的工艺组合，从高密度微细藻类池到水耕植物过滤床，再到潜流人工湿地，达到了高效去除亲脂性痕量有机物的目的。藻类对亲脂性痕量有机物的吸收实现了水体中亲脂性痕量有机物的固定。同时，藻类的代谢产物促进了痕量有机物的光降解。水生植物的根系对藻类的截留作用，使得吸收了痕量有机物的藻类被有效拦截沉降,形成积泥。湿地填料和湿地植物对水中剩余的悬浮物质再次过滤，起到了把关作用,保证了优良的出水水质。In summary, the present invention adopts different process combinations, from high-density microalgae ponds to hydroponic plant filter beds, and then to subsurface constructed wetlands, to achieve the purpose of efficiently removing lipophilic trace organic matter. The absorption of lipophilic trace organic matter by algae realizes the immobilization of lipophilic trace organic matter in water. Meanwhile, the metabolites of algae promoted the photodegradation of trace organic matter. The interception of algae by the root system of aquatic plants makes the algae that absorb trace organic matter be effectively intercepted and settled to form mud deposits. Wetland fillers and wetland plants re-filter the remaining suspended matter in the water, which plays a gatekeeping role and ensures excellent effluent water quality.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.
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