Biological blocking preventing autonomous oxygen release device for undercurrent constructed wetland
A constructed wetland and anti-biological technology, applied in the direction of sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of increasing construction and operation costs, difficulty in widespread promotion, and affecting wetland stability Operation and other problems, to achieve the effect of delaying the rate of biological clogging, improving microbial activity, and extending the oxygen release cycle
Active Publication Date: 2017-01-25
辽宁省城乡建设规划设计院有限责任公司
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Problems solved by technology
However, this technology adds aeration pipes and blower systems, which increases construction and operation costs; at the same time, excessive aeration can easily lead to laminar fluidization of wetland fillers, affecting the stable operation of wetlands, so this technology is still difficult to be widely promoted.
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[0010] The present invention is specifically described below in conjunction with accompanying drawing, as figure 1 , figure 2 As shown, the device of the present invention is installed at the water inlet end of the subsurface constructed wetland, and is composed of a water distribution system 1, an oxygen-releasing filler system 2 and an air distribution system 4; the water distribution system is a circular pipe with a length of 1-3 meters and a diameter of 100-200mm. Circular holes 5 with a diameter of 15-30mm are uniformly distributed on the pipe wall, and the opening ratio on the pipe surface is 30%-45%; the water inlet flow rate is controlled at 0.5-2.0m / s; the oxygen-releasing packing system 2 consists of an oxygen-releasing packing layer 21 and a separation layer 3, filled between the water distribution system 1 and the air distribution system 4, the separation layer 3 is arranged outside the oxygen-releasing filler layer 21, and the distance between the separation laye...
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Abstract
The invention discloses a biological blocking preventing autonomous oxygen release device for an undercurrent constructed wetland. The device is mounted at a water inlet end of an undercurrent constructed wetland and consists of a water distribution system, an oxygen release packing system and an air distribution system, wherein the water distribution system is a circular pipeline; the oxygen release packing system consists of an oxygen release packing layer and a partitioning layer and is filled between the water distribution system and the air distribution system; the oxygen release packing layer comprises the following components in percentage by weight: 30-70% of calcium peroxide, 40-80% of cationic resin, 2-10% of a polyethylene glycol solution and 1-5% of kaolin; the air distribution system is a circular pipeline; round holes are uniformly formed in the wall of the circular pipeline. The biological blocking preventing autonomous oxygen release device for the undercurrent constructed wetland has the advantages that oxygen can be released from chemical reaction of water and oxygen release packing in the oxygen release packing system, the concentration of dissolved oxygen between packing layers of the undercurrent constructed wetland can be increased, the microorganism activity of the packing layers can be improved, and the concentration and the total amount of organic matters which can cause biological blocking can be reduced. The biological blocking velocity of the undercurrent constructed wetland can be reduced, and the service life of the undercurrent constructed wetland can be prolonged.
Description
technical field [0001] The invention relates to an anti-biological clogging autonomous oxygen release device for subsurface constructed wetlands, in particular to a device for preventing, preventing and recovering biological clogging of subsurface constructed wetlands. Background technique [0002] Subsurface flow constructed wetlands have been widely used as one of the main processes for advanced sewage treatment and natural river restoration. During the operation of wetlands, affected by factors such as operation mode, influent water quality and quantity, and temperature, some organic matter cannot be fully degraded and accumulates in the form of extracellular polymers in the subsurface constructed wetland filler, forming a biological blockage problem in the subsurface constructed wetland. Seriously affecting the sewage treatment efficiency of subsurface flow constructed wetlands and shortening the service life of subsurface flow constructed wetlands has become one of the ...
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IPC IPC(8): C02F3/32
CPCC02F3/32Y02W10/10
Inventor 张荣新傅金祥焦义利刘瑞马兴冠于鹏飞黄殿男郜玉楠王勇勇何祥
Owner 辽宁省城乡建设规划设计院有限责任公司