CN108409027A - A kind of biological delaying basin for strengthening road Initial Runoff denitrogenation dephosphorizing process - Google Patents

A kind of biological delaying basin for strengthening road Initial Runoff denitrogenation dephosphorizing process Download PDF

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CN108409027A
CN108409027A CN201810052308.9A CN201810052308A CN108409027A CN 108409027 A CN108409027 A CN 108409027A CN 201810052308 A CN201810052308 A CN 201810052308A CN 108409027 A CN108409027 A CN 108409027A
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denitrification
mixed
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mixed packing
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黄勇强
周永超
刘灿灿
赵文亮
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Jiangsu University
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/281Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001Runoff or storm water
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae

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  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Biological Wastes In General (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

本发明提供了一种强化道路初期径流脱氮除磷过程的生物滞留池,从上而下依次铺设有土壤覆盖层、上层混和填料层、下层混和填料层、碎石过滤层和卵石承托层,所述下层混和填料层为低渗透率混合填料,由河沙、铝污泥和碎木屑混合而成,所述上层混和填料层为高渗透率混合填料,所述上层混和填料层中设有多根通气管,通气管的一端伸入至上层混和填料层中,另一端伸出生物滞留池顶端与空气连通,多根所述通气管之间通过管道连通,本发明的新型生物滞留池可以充分的与城市道路、公园、生活区等区域的绿化和景观建设相结合,实现净化绿化的双重功效。

The invention provides a bioretention pond for strengthening the denitrification and phosphorus removal process of the initial runoff of the road, which is sequentially laid with a soil covering layer, an upper layer of mixed filler layer, a lower layer of mixed filler layer, a crushed stone filter layer and a pebble supporting layer. , the lower mixed packing layer is a low-permeability mixed packing, which is formed by mixing river sand, aluminum sludge and wood chips, the upper mixed packing layer is a high-permeable mixed packing, and the upper mixed packing layer is provided with A plurality of ventilation pipes, one end of the ventilation pipe extends into the upper mixed packing layer, and the other end stretches out from the top of the bioretention tank to communicate with the air, and the plurality of ventilation pipes are communicated through pipelines. The novel bioretention tank of the present invention can It is fully combined with the greening and landscape construction of urban roads, parks, living areas and other areas to achieve the double effect of purification and greening.

Description

一种强化道路初期径流脱氮除磷过程的生物滞留池A bioretention pond for strengthening the process of denitrification and phosphorus removal of initial road runoff

技术领域technical field

本发明涉及环境保护领域,具体涉及一种强化道路初期径流脱氮除磷过程的生物滞留池。The invention relates to the field of environmental protection, in particular to a bioretention pond for strengthening the denitrification and dephosphorization process of initial road runoff.

背景技术Background technique

我国目前正处在城市化快速发展的阶段,这种高速发展给城市水环境带来了巨大的压力和挑战,引发了一系列的环境问题。城市面源污染是指在降水的条件下,雨水和径流冲刷城市地面,使污染物进入受纳水体引起的环境问题。由于城市中人类活动强,土地不透水面积比例高,因此降雨径流来势猛,水量大,水质差。城市面源主要污染物为COD、SS、TP和TN等。这些污染物随着降雨进入到地表水体,尤其在初期雨水中含量较高。这些污染物的去除对于城市水体环境的保护和水资源的合理高效利用具有十分重要的意义。同时,为了改善城市水安全和水的生态环境,我国目前正在进行海绵城市建设。海绵城市,是新一代城市雨洪管理概念,是指城市在适应环境变化和应对雨水带来的自然灾害等方面具有良好的“弹性”,也可称之为“水弹性城市”。国际通用术语为“低影响开发雨水系统构建”。下雨时吸水、蓄水、渗水、净水,需要时将蓄存的水“释放”并加以利用。建海绵城市就要有“海绵体”。城市“海绵体”既包括河、湖、池塘等水系,也包括绿地、花园、可渗透路面这样的城市配套设施。雨水通过这些“海绵体”下渗、滞蓄、净化、回用,最后剩余部分径流通过管网、泵站外排,从而可有效提高城市排水系统的标准,缓减城市内涝的压力。因此,适应于海绵城市建设的要求,为保证河、湖、池塘或蓄水池的水质,则也要求对雨水中的面源污染物进行截留去除。my country is currently in the stage of rapid urbanization, which has brought enormous pressure and challenges to the urban water environment and caused a series of environmental problems. Urban non-point source pollution refers to the environmental problems caused by rainwater and runoff scouring the urban ground under the condition of precipitation, causing pollutants to enter the receiving water body. Due to the strong human activities in the city and the high proportion of impermeable land area, the rainfall runoff is fierce, the water volume is large, and the water quality is poor. The major urban non-point source pollutants are COD, SS, TP and TN. These pollutants enter surface water bodies with rainfall, especially in the initial rainfall. The removal of these pollutants is of great significance to the protection of urban water environment and the rational and efficient use of water resources. At the same time, in order to improve urban water security and water ecological environment, my country is currently constructing sponge cities. Sponge city is a new generation of urban stormwater management concept. It refers to the city's good "elasticity" in adapting to environmental changes and responding to natural disasters caused by rainwater. It can also be called "water elastic city". The international general term is "low-impact development stormwater system construction". When it rains, it absorbs, stores, infiltrates, and purifies water, and "releases" the stored water for use when needed. Building a sponge city requires a "sponge body". The urban "sponge body" includes not only water systems such as rivers, lakes, and ponds, but also urban supporting facilities such as green spaces, gardens, and permeable pavements. Rainwater infiltrates, stores, purifies, and reuses through these "sponge bodies", and finally the remaining part of the runoff is discharged through pipe networks and pumping stations, which can effectively improve the standard of urban drainage systems and reduce the pressure of urban waterlogging. Therefore, to meet the requirements of sponge city construction, in order to ensure the water quality of rivers, lakes, ponds or reservoirs, it is also required to intercept and remove non-point source pollutants in rainwater.

城市绿化带和景观区对城市降雨形成径流具有缓冲作用,对面源污染物具有截留和去除的作用,对保护城市水生态和水环境具有重要的作用。目前,在城市绿化带或城镇景观区的建设上还存在着功能单一,结构设置不合理的缺点,尤其没有针对面源污染物中和等污染物的去除机理进行合理和针对性的结构设计,和的截留去除效果不好。Urban green belts and landscape areas have a buffering effect on urban rainfall runoff, intercept and remove non-point source pollutants, and play an important role in protecting urban water ecology and water environment. At present, in the construction of urban green belts or urban landscape areas, there are still shortcomings of single function and unreasonable structure settings. In particular, there is no reasonable and targeted structural design for the removal mechanism of non-point source pollutants and other pollutants. And the interception and removal effect is not good.

生物滞留设施能有效去除雨水径流中包括氮类化合物在内的多种污染物。设施进水中的有机氮和氨氮在下渗过程中易被介质吸附或截留得到去除。被吸附的有机氮和氨氮在两场降雨事件之间的落干期,由于氧气的作用发生氨化和硝化而转化为硝态氮。硝态氮只有在缺氧和碳源充足的条件下,通过反硝化作用以N2的形式被去除。传统生物滞留设施为了保证设施的含水率并为植物生长提供营养,在填料层的介质中添加了一定量的堆肥,可为反硝化提供碳源。但是传统的生物滞留设施在降雨间歇期,介质处于好氧状态,通常无法满足反硝化作用所需要的缺氧条件。由于介质不能有效吸附带负电荷的硝酸盐,导致生物滞留设施出水中硝酸盐浓度经常高于进水浓度,特别是在进水中氨氮和有机氮比较高的场合。为解决上述问题,已公开的发明专利文件提出提高出水口的位置,创造淹水区使设施下部出现利于反硝化的厌氧环境,但这种方法使得淹没区的介质失去水量调蓄作用,降低了设施的年径流总量控制率,对硝态氮去除效果也不尽满意Bioretention facilities can effectively remove a variety of pollutants in stormwater runoff, including nitrogen compounds. The organic nitrogen and ammonia nitrogen in the influent water of the facility are easily removed by adsorption or interception by the medium during the infiltration process. The adsorbed organic nitrogen and ammonia nitrogen are converted into nitrate nitrogen through ammonification and nitrification under the action of oxygen during the dry period between two rainfall events. Nitrate nitrogen is only removed in the form of N2 by denitrification under the condition of anoxic and abundant carbon source. In order to ensure the moisture content of the facility and provide nutrients for plant growth, traditional bioretention facilities add a certain amount of compost to the medium of the filler layer, which can provide carbon sources for denitrification. However, the medium in traditional bioretention facilities is in an aerobic state during the intermittent period of rainfall, which usually cannot meet the anoxic conditions required for denitrification. Because the medium cannot effectively adsorb negatively charged nitrate, the concentration of nitrate in the effluent of the bioretention facility is often higher than that in the influent, especially when the influent is relatively high in ammonia nitrogen and organic nitrogen. In order to solve the above problems, the disclosed invention patent document proposes to increase the position of the water outlet and create a flooded area to create an anaerobic environment conducive to denitrification in the lower part of the facility. The total annual runoff control rate of the facility is not satisfied, and the removal effect of nitrate nitrogen is not satisfactory

理想的方法应是该方法可以随着不同绿化带及景观区建设的要求而随意进行绿化植物的选择,根据脱氮除磷的生物化学过程的要求而设置合理的生物滞留池结构,同时可以实现对水的快速排除而不造成路面积水,更为重要的是可以实现对水中氮磷的高效去除,避免水体的富营养化。The ideal method should be that this method can freely select green plants according to the requirements of different green belts and landscape area construction, and set up a reasonable bioretention tank structure according to the requirements of the biochemical process of nitrogen and phosphorus removal, and at the same time can realize The rapid removal of water does not cause road surface water, and more importantly, the efficient removal of nitrogen and phosphorus in water can be achieved to avoid eutrophication of water bodies.

发明内容Contents of the invention

针对现有技术中存在不足,本发明提供了一种强化道路初期径流脱氮除磷过程的生物滞留池。Aiming at the deficiencies in the prior art, the invention provides a bioretention pond for strengthening the denitrification and dephosphorization process of initial road runoff.

本发明是通过以下技术手段实现上述技术目的的。The present invention achieves the above-mentioned technical purpose through the following technical means.

一种强化道路初期径流脱氮除磷过程的生物滞留池,从上而下依次铺设有土壤覆盖层、上层混和填料层、下层混和填料层、碎石过滤层和卵石承托层,所述卵石承托层中设有多根排水管,所述排水管的一端位于卵石承托层中,排水管的另一端伸出生物滞留池,用以将处理的雨水及时的排出或输送至下一处理设施,所述下层混和填料层为低渗透率混合填料,由河沙、铝污泥和碎木屑混合而成,所述上层混和填料层为高渗透率混合填料,所述上层混和填料层中设有多根通气管,通气管的一端伸入至上层混和填料层中,另一端伸出生物滞留池顶端与空气连通,多根所述通气管之间通过管道连通,通气管上设有多个出气孔,上层混合填料层的粒径大,渗透率高,同时设置通气管,可以使上层混合填料处于好氧状态,所述下层混和填料层料粒径小,这样随着布水期与落干期的交替,从上而下逐渐形成好氧缺氧的状态,微生物逐渐形成稳定的群落,使得硝化与反硝化过程可以顺利的进行。A bioretention pond for strengthening the denitrification and phosphorus removal process of the initial runoff of the road. From top to bottom, a soil cover layer, an upper layer of mixed filler layer, a lower layer of mixed filler layer, a crushed stone filter layer and a pebble support layer are successively laid. There are multiple drainage pipes in the supporting layer, one end of the drainage pipe is located in the pebble supporting layer, and the other end of the drainage pipe extends out of the bioretention tank to discharge or transport the treated rainwater to the next treatment in time. facilities, the lower mixed packing layer is a low-permeability mixed packing, which is made of river sand, aluminum sludge and wood chips, the upper mixed packing layer is a high-permeable mixed packing, and the upper mixed packing layer is set There are multiple ventilation pipes. One end of the ventilation pipe extends into the upper mixed packing layer, and the other end protrudes from the top of the bioretention tank to communicate with the air. The multiple ventilation pipes are connected through pipelines, and there are multiple ventilation pipes. The air outlet, the upper mixed packing layer has a large particle size and high permeability. At the same time, the ventilation pipe is set to make the upper mixed packing in an aerobic state, and the lower mixed packing layer has a small particle size. The alternation of dry periods gradually forms an aerobic and anoxic state from top to bottom, and microorganisms gradually form a stable community, so that the nitrification and denitrification processes can proceed smoothly.

优选地,所述下层混合填料中的河沙、铝污泥和碎木屑的体积比为75~85:10~15:5~10,对污染物的去除效果最好。Preferably, the volume ratio of river sand, aluminum sludge and wood chips in the lower layer of mixed filler is 75-85:10-15:5-10, which has the best effect on removing pollutants.

优选地,所述上层混和填料层由河沙、矿渣和石英砂混合而成。Preferably, the upper mixed packing layer is formed by mixing river sand, slag and quartz sand.

优选地,所述上层混和填料层中的河沙、矿渣和石英砂的体积比为75~85:5~10:10~15,在保证较低成本的同时,实现对污染物高效的去除。Preferably, the volume ratio of river sand, slag and quartz sand in the upper mixed packing layer is 75-85:5-10:10-15, so as to achieve efficient removal of pollutants while ensuring low cost.

优选地,所述卵石承托层粒径10~20mm,高度为200mm。Preferably, the pebble supporting layer has a particle size of 10-20mm and a height of 200mm.

优选地,所述碎石过滤层中碎石的粒径8~10mm,厚度为150~20mm,过滤填料层中流失的细碎滤料,防止细碎的填料随水体流失,对下部排水系统造成堵塞。Preferably, the crushed stones in the crushed stone filter layer have a particle size of 8-10mm and a thickness of 150-20mm, and filter the finely divided filter material lost in the packing layer to prevent the finely crushed packing from losing with the water body and causing blockage to the lower drainage system.

优选地,在所述土壤覆盖层中种植植物,所述植物为花、草或者灌木中的一种或多种。所述植物种类应适应当地的气候,在净水的同时达到美化环境的作用。Preferably, plants are planted in the soil covering layer, and the plants are one or more of flowers, grasses or shrubs. The plant species should adapt to the local climate, and achieve the effect of beautifying the environment while purifying the water.

优选地,所述下层混合填料中的铝污泥为自来水厂的尾泥,因污水厂尾泥中磷含量过高,存在淋洗现象,不宜选用污水厂尾泥。Preferably, the aluminum sludge in the lower mixed filler is tailings from waterworks. Because the phosphorus content in the tailings from sewage plants is too high, there is leaching phenomenon, so it is not suitable to use sludge from sewage plants.

优选地,所述排水管位于卵石承托层中的一端端口处设有滤网,降低排水管堵塞风险。Preferably, a strainer is provided at one end port of the drainpipe located in the pebble supporting layer, so as to reduce the risk of clogging of the drainpipe.

优选地,还包括溢流管,所述溢流管的一端与卵石承托层中的排水管连通,另一端伸入至所述土壤覆盖层上方的蓄水层中,并与蓄水层最高处持平。Preferably, an overflow pipe is also included, one end of the overflow pipe communicates with the drainage pipe in the pebble supporting layer, and the other end extends into the aquifer above the soil cover layer, and is the highest with the aquifer. flat.

本发明的有益效果:Beneficial effects of the present invention:

1.本发明采用上层低渗透率材料加设通气管的方式,保证雨期径流可以快速的下渗,降低城市内涝的风险。同时实现落干期和布水期间,系统上层能够保持较好的好氧环境,利于硝化反应的进行,从而达到去除氨氮的目的。下层设置低渗透率材料,同时添加木屑作为有机物,营造了反硝化过程所需要的条件,实现对硝态氮的削减。1. The present invention adopts the method of adding a ventilation pipe to the upper low-permeability material to ensure that the runoff can infiltrate quickly during the rainy season and reduce the risk of urban waterlogging. At the same time, during the drying period and the water distribution period, the upper layer of the system can maintain a good aerobic environment, which is conducive to the nitrification reaction, so as to achieve the purpose of removing ammonia nitrogen. The lower layer is equipped with low-permeability materials, and wood chips are added as organic matter to create the conditions required for the denitrification process and achieve the reduction of nitrate nitrogen.

2.本发明下层填料选用铝污泥作为改良剂,该材料具有发达的孔隙结构,且有较高的比表面积,所以它对于磷的吸附量相对较大,其次铝污泥主要是无定型的非晶体结构,含有大量铝、铁、钙等金属离子或氧化物,这些离子对磷酸根有很强的吸附性能,可以与磷酸根发生络合反应,生成稳定的金属离子磷酸盐络合物,从而达到除磷的目的。2. The lower filler of the present invention uses aluminum sludge as the modifier. The material has a well-developed pore structure and a high specific surface area, so it has a relatively large adsorption capacity for phosphorus. Secondly, the aluminum sludge is mainly amorphous Non-crystalline structure, containing a large amount of metal ions or oxides such as aluminum, iron, calcium, etc. These ions have strong adsorption properties for phosphate, and can undergo complexation reactions with phosphate to form stable metal ion phosphate complexes. So as to achieve the purpose of phosphorus removal.

3.铝污泥作为水厂的一种固体废弃物,长期以来卫生填埋是其主要处理方式,而该发明选用铝污泥作为添加剂,实现了固体废弃物的资源化利用。3. Aluminum sludge is a kind of solid waste in waterworks. Sanitary landfill has been its main treatment method for a long time. However, this invention uses aluminum sludge as an additive to realize the resource utilization of solid waste.

4.本发明对道路初期径流COD、SS等污染物高效截留的同时,实现高效的脱氮除磷过程。同时可以充分的与城市道路、公园、生活区等区域的绿化和景观建设相结合,实现绿化与雨水净化的双重功效。4. The present invention efficiently intercepts pollutants such as COD and SS in the initial runoff of roads, and at the same time realizes an efficient nitrogen and phosphorus removal process. At the same time, it can be fully combined with the greening and landscape construction of urban roads, parks, living areas and other areas to achieve the dual effects of greening and rainwater purification.

附图说明Description of drawings

图1为本发明所述一种强化道路初期径流脱氮除磷过程的生物滞留池的结构示意图。Fig. 1 is a structural schematic diagram of a bioretention pond for strengthening the denitrification and phosphorus removal process of initial road runoff according to the present invention.

图中:1.排水管;2.通气管;3.蓄水层;4.土壤覆盖层;5.上层混和填料层;6.下层混和填料层7.碎石过滤层;8.卵石承托层;9.溢流管In the figure: 1. Drainage pipe; 2. Ventilation pipe; 3. Aquifer; 4. Soil cover layer; 5. Upper layer of mixed filler layer; 6. Lower layer of mixed filler layer; Layer; 9. Overflow pipe

具体实施方式Detailed ways

下面结合附图以及具体实施例对本发明作进一步的说明,但本发明的保护范围并不限于此。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

如图1所示,本发明所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,从上而下依次铺设有土壤覆盖层4、上层混和填料层5、下层混和填料层6、碎石过滤层7和卵石承托层8,所述卵石承托层8中卵石的粒径10~20mm,高度为200mm,卵石承托层8中设有两根排水管1,所述排水管1的末端伸出生物滞留池,用以将处理的雨水及时的排出或输送至下一处理设施,排水管1位于卵石承托层8中的端口处设有滤网,降低排水管1堵塞的风险。所述下层混和填料层6为低渗透率混合填料,由河沙、铝污泥和碎木屑按体积比为75~85:10~15:5~10混合而成,所述上层混和填料层5为高渗透率混合填料,由河沙、矿渣和石英砂按体积比为75~85:5~10:10~15混合而成,所述上层混和填料层5中设有多根通气管2,通气管2的一端伸入至上层混和填料层5中,另一端伸出生物滞留池顶端与空气连通,多根所述通气管(2)之间通过连通,上层混合填料层5的粒径大,渗透率高,同时设置通气管,可以使上层混合填料层5处于好氧状态,所述下层混和填料层6的粒径小,这样随着布水期与落干期的交替,从上而下逐渐形成好氧缺氧的状态,微生物逐渐形成稳定的群落,使得硝化与反硝化过程可以顺利的进行。碎石过滤层7中碎石的粒径8~10mm,厚度为150~20mm,过滤填料层中流失的细碎滤料,防止细碎的填料随水体流失,对下部排水系统造成堵塞。As shown in Fig. 1, a kind of bioretention pond of the present invention strengthens the denitrification and dephosphorization process of the initial stage runoff of the road, and from top to bottom, a soil cover layer 4, an upper layer of mixed filler layer 5, and a lower layer of mixed filler layer 6 are successively laid. , gravel filter layer 7 and pebble supporting layer 8, the particle diameter of pebble in described pebble supporting layer 8 is 10~20mm, and height is 200mm, is provided with two drainage pipes 1 in pebble supporting layer 8, and described drainage The end of the pipe 1 extends out of the bioretention tank to discharge or transport the treated rainwater to the next treatment facility in a timely manner. The port of the drain pipe 1 located in the pebble supporting layer 8 is provided with a filter to reduce the blockage of the drain pipe 1 risks of. The lower mixed filler layer 6 is a low-permeability mixed filler, which is formed by mixing river sand, aluminum sludge and wood chips in a volume ratio of 75-85:10-15:5-10. The upper mixed filler layer 5 It is a high-permeability mixed filler, which is composed of river sand, slag and quartz sand in a volume ratio of 75-85:5-10:10-15. The upper mixed filler layer 5 is provided with a plurality of ventilation pipes 2, One end of the ventilation pipe 2 extends into the upper layer of mixed packing layer 5, and the other end stretches out from the top of the bioretention tank to communicate with the air, and a plurality of said ventilation pipes (2) are communicated through, and the particle size of the upper layer of mixed packing layer 5 is large. , the permeability is high, and the air pipe is set at the same time, so that the upper layer of mixed packing layer 5 can be in an aerobic state, and the particle size of the lower layer of mixed packing layer 6 is small. Under the condition of aerobic and anoxic conditions, microorganisms gradually form a stable community, so that the process of nitrification and denitrification can proceed smoothly. The gravel in the gravel filter layer 7 has a particle size of 8-10mm and a thickness of 150-20mm, and filters the finely crushed filter material lost in the packing layer to prevent the finely crushed packing from losing with the water body and causing blockage to the lower drainage system.

实施例一Embodiment one

挖掘一定深度的土壤,在底层铺设一层卵石承托层8,铺设高度为200mm,卵石粒径10~20mm,层卵石承托层8内水平并排设有两根直径为100mm的排水管1,排水管1用以将处理的雨水及时的排出或输送至下一处理设施,然后再铺设一层碎石过滤层7,填充厚度150mm,碎石粒径8-10mm;在碎石过滤层7上填充河沙、铝污泥和碎木屑混合而成的低渗透率混和填料,高度为500mm。河沙、铝污泥、碎木屑按照体积比为85:10:5的比例配置。Excavate the soil at a certain depth, lay a pebble support layer 8 on the bottom layer, the laying height is 200mm, the pebble particle size is 10-20mm, and two drainage pipes 1 with a diameter of 100mm are horizontally arranged in the pebble support layer 8, The drainage pipe 1 is used to discharge or transport the treated rainwater to the next treatment facility in a timely manner, and then lay a layer of gravel filter layer 7 with a filling thickness of 150mm and a particle size of 8-10mm; on the gravel filter layer 7 It is filled with low-permeability mixed filler mixed with river sand, aluminum sludge and sawdust, with a height of 500mm. River sand, aluminum sludge, and wood chips are configured in a volume ratio of 85:10:5.

在下层混和填料层6上在铺设一层由河沙、矿渣和石英砂混合而成的大粒径,高渗透率混合填料,高度为300mm的上层混合填料层5。河沙、矿渣和石英砂按照体积比为85:5:10的比例配置,并在该层设置多个通气管2,通气管2直径为100mm,孔径为5mm,开孔距离100mm,用以保证整个上层混和填料的渗透率、含氧率等可以在落干期内得到恢复。On the lower mixed packing layer 6 , a layer of large particle size mixed with river sand, slag and quartz sand, high permeability mixed packing, and an upper mixed packing layer 5 with a height of 300 mm are laid. The river sand, slag and quartz sand are configured according to the volume ratio of 85:5:10, and a plurality of ventilation pipes 2 are arranged in this layer. The permeability and oxygen content of the entire upper mixed filler can be recovered during the drying period.

在上层混合填料层上再铺设厚度为150mm的土壤覆盖层,在该层种植如鸢尾,在净水的同时达到美化环境的功能。A soil cover layer with a thickness of 150mm is laid on the upper mixed filler layer, and irises are planted on this layer to achieve the function of beautifying the environment while purifying water.

实施例二Embodiment two

挖掘一定深度的土壤,在底层铺设一层卵石承托层8,铺设高度为200mm,卵石粒径10-20mm,层卵石承托层8内水平并排设有两根直径为100mm的排水管1,排水管1用以将处理的雨水及时的排出或输送至下一处理设施,然后再铺设一层碎石过滤层7,填充厚度150mm,碎石粒径8-10mm;Excavate the soil at a certain depth, lay a pebble support layer 8 on the bottom layer, the laying height is 200mm, the pebble particle size is 10-20mm, two drainage pipes 1 with a diameter of 100mm are horizontally arranged in the layer pebble support layer 8, The drainage pipe 1 is used to discharge or transport the treated rainwater to the next treatment facility in a timely manner, and then lay a layer of crushed stone filter layer 7 with a filling thickness of 150mm and a crushed stone particle size of 8-10mm;

在碎石过滤层7上填充河沙、铝污泥和碎木屑混合而成的低渗透率混和填料,高度为600mm。河沙、铝污泥、碎木屑按照体积比为75:15:10的比例配置。The gravel filter layer 7 is filled with low-permeability mixed packing made of river sand, aluminum sludge and wood chips, with a height of 600mm. River sand, aluminum sludge, and wood chips are configured in a volume ratio of 75:15:10.

在下层混和填料层上在铺设一层由河沙、矿渣和石英砂混合而成的大粒径,高渗透率混合填料,高度为400mm。河沙、矿渣和石英砂按照体积比为75:10:15的比例配置,并在该层设置通气管2,通气管2直径为100mm,孔径为5mm,开孔距离100mm,用以保证整个上层混和填料的渗透率、含氧率等可以在落干期内得到恢复。On the lower mixed packing layer, lay a layer of large particle size and high permeability mixed packing made of river sand, slag and quartz sand, with a height of 400mm. The river sand, slag and quartz sand are configured according to the volume ratio of 75:10:15, and the ventilation pipe 2 is set in this layer. The permeability and oxygen content of the mixed filler can be recovered during the drying period.

在上层混合填料层上再铺设厚度为150mm的土壤覆盖层,在该层种植耐如鸢尾,在净水的同时达到美化环境的功能。A soil cover layer with a thickness of 150mm is laid on the upper layer of mixed filler layer, and irises are planted on this layer to achieve the function of beautifying the environment while purifying water.

对实施例一和实施二进行脱氮除磷效果检测,结果为:可有效去除初期径流中90%以上的氨氮和TSS,以及85%以上的总磷,对COD滞留率达到80%以上,同时对硝态氮的去除率达到60%以上,且去除效果稳定。Carry out denitrification and dephosphorization effect detection to embodiment one and implementation two, the result is: can effectively remove more than 90% of ammonia nitrogen and TSS in the initial runoff, and more than 85% of total phosphorus, reach more than 80% to COD retention rate, simultaneously The removal rate of nitrate nitrogen reaches more than 60%, and the removal effect is stable.

所述实施例为本发明的优选的实施方式,但本发明并不限于上述实施方式,在不背离本发明的实质内容的情况下,本领域技术人员能够做出的任何显而易见的改进、替换或变型均属于本发明的保护范围。The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.

Claims (10)

1.一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:从上而下依次铺设有土壤覆盖层(4)、上层混和填料层(5)、下层混和填料层(6)、碎石过滤层(7)和卵石承托层(8),所述卵石承托层(8)中设有多根排水管(1),所述排水管(1)的一端位于卵石承托层(8)中,排水管(1)的另一端伸出生物滞留池,所述下层混和填料层(6)为低渗透率混合填料,由河沙、铝污泥和碎木屑混合而成,所述上层混和填料层(5)为高渗透率混合填料,所述上层混和填料层(5)中设有多根通气管(2),所述通气管(2)的一端伸入至上层混和填料层(5)中,另一端与空气连通,多根所述通气管(2)之间通过管道连通,所述上层混和填料层(5)构成好氧区,所述下层混和填料层(6)构成缺氧区。1. A bioretention pond for strengthening the denitrification and dephosphorization process of the initial runoff of the road is characterized in that: from top to bottom, a soil cover layer (4), an upper layer of mixed filler layer (5), a lower layer of mixed filler layer (6 ), a gravel filter layer (7) and a pebble supporting layer (8), the pebble supporting layer (8) is provided with a plurality of drainage pipes (1), and one end of the drainage pipe (1) is located at the pebble bearing In the support layer (8), the other end of the drainage pipe (1) protrudes from the bioretention tank, and the lower mixed packing layer (6) is a low-permeability mixed packing made of river sand, aluminum sludge and wood chips , the upper mixed packing layer (5) is a high-permeability mixed packing, the upper mixed packing layer (5) is provided with a plurality of air pipes (2), and one end of the air pipe (2) extends into the upper layer In the mixed packing layer (5), the other end communicates with the air, and a plurality of said ventilation pipes (2) are communicated through pipelines, the upper mixed packing layer (5) constitutes an aerobic zone, and the lower mixed packing layer ( 6) Form an anoxic zone. 2.根据权利要求1所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:所述下层混合填料(6)中的河沙、铝污泥和碎木屑的体积比为75~85:10~15:5~10。2. A kind of bioretention pond for strengthening the denitrification and dephosphorization process of initial stage runoff of road according to claim 1, it is characterized in that: the volume of river sand, aluminum sludge and wood chips in the mixed filler (6) of the lower layer The ratio is 75-85:10-15:5-10. 3.根据权利要求1所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:所述上层混和填料层(5)由河沙、矿渣和石英砂混合而成。3. The bioretention pond for strengthening the denitrification and phosphorus removal process of the initial runoff of the road according to claim 1, characterized in that: the upper mixed filler layer (5) is formed by mixing river sand, slag and quartz sand. 4.根据权利要求3所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:所述上层混和填料层(5)中的河沙、矿渣和石英砂的体积比为75~85:5~10:10~15。4. A kind of bioretention pond for strengthening the denitrification and dephosphorization process of initial stage runoff of road according to claim 3, it is characterized in that: the volume ratio of river sand, slag and quartz sand in the mixed packing layer (5) of the upper layer 75~85:5~10:10~15. 5.根据权利要求1所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:所述卵石承托层(8)中卵石的粒径10~20mm,高度为200mm。5. A bioretention pond for strengthening the denitrification and phosphorus removal process of the initial runoff of the road according to claim 1, characterized in that: the pebbles in the pebble support layer (8) have a particle size of 10-20mm and a height of 200mm . 6.根据权利要求1所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:所述碎石过滤层(7)中碎石的粒径8~10mm,厚度为150~20mm。6. A kind of bioretention pond for strengthening the denitrification and dephosphorization process of road initial runoff according to claim 1, characterized in that: the gravel in the gravel filter layer (7) has a particle diameter of 8 to 10 mm and a thickness of 150-20mm. 7.根据权利要求1所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:在所述土壤覆盖层(4)中种植植物,所述植物为花、草或者灌木中的一种或多种。7. A kind of bioretention pond for strengthening the denitrification and dephosphorization process of road initial runoff according to claim 1, characterized in that: plant plants in the soil cover layer (4), and the plants are flowers, grasses or One or more types of shrubs. 8.根据权利要求1所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:所述下层混合填料(6)中的铝污泥为自来水厂的尾泥。8. A bioretention pond for strengthening the denitrification and phosphorus removal process of initial runoff of roads according to claim 1, characterized in that: the aluminum sludge in the lower mixed filler (6) is the tailing sludge of a waterworks. 9.根据权利要求1所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:所述排水管(1)位于卵石承托层(8)中的一端端口处设有滤网。9. A kind of bioretention pond for strengthening the denitrification and dephosphorization process of the initial runoff of the road according to claim 1, characterized in that: the drainpipe (1) is located at one end port of the pebble supporting layer (8) There is a filter. 10.根据权利要求1所述的一种强化道路初期径流脱氮除磷过程的生物滞留池,其特征在于:还包括溢流管(9),所述溢流管(9)的一端与卵石承托层(8)中的排水管(1)连通,另一端伸入至所述土壤覆盖层(4)上方的蓄水层(3)中。10. A kind of bioretention pond for strengthening the denitrification and dephosphorization process of road initial runoff according to claim 1, characterized in that: it also includes an overflow pipe (9), and one end of the overflow pipe (9) is connected with pebbles The drainage pipe (1) in the supporting layer (8) is connected, and the other end extends into the water storage layer (3) above the soil covering layer (4).
CN201810052308.9A 2018-01-19 2018-01-19 A kind of biological delaying basin for strengthening road Initial Runoff denitrogenation dephosphorizing process Pending CN108409027A (en)

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CN109809632A (en) * 2019-02-01 2019-05-28 江苏大学 A Bioretention Pond for Improving Nitrogen and Phosphorus Removal Capability
CN113620430A (en) * 2021-08-06 2021-11-09 江苏龙腾工程设计股份有限公司 Intelligent aeration type floating material module biological retention tank
CN115340184A (en) * 2022-07-25 2022-11-15 悉地(苏州)勘察设计顾问有限公司 An anti-clogging bioretention tank system and its working method

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CN204529458U (en) * 2014-11-21 2015-08-05 河南省电力勘测设计院 For the treatment of the artificial swamp of city rainfall runoff
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