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Sewage advanced treatment and recycling method capable of substantially raising economy

A technology for advanced treatment and sewage, which is applied in the direction of water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of high treatment load, low removal rate of COD and suspended matter, and failure issues such as recycling standards

Inactive Publication Date: 2013-07-24
北京翰祺环境技术有限公司
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the sewage advanced treatment process, the common coagulation sedimentation tank has a low removal rate of COD and suspended solids, which leads to high treatment load and high operating cost in the subsequent ozone oxidation method, which cannot meet the reuse standard , and the current situation of low recovery and utilization rate of pure oxygen tail gas produced by ozonation method

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  • Sewage advanced treatment and recycling method capable of substantially raising economy
  • Sewage advanced treatment and recycling method capable of substantially raising economy
  • Sewage advanced treatment and recycling method capable of substantially raising economy

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing, the present invention will be further described:

[0030] see figure 1 , The advanced treatment process of wastewater is a set of technological process including high-efficiency sedimentation tank A, ozone contact reaction tank B and biological aerated filter D as the main devices, supplemented by the use of ozone tail gas. see figure 2 , the sewage after the secondary treatment first enters the high-efficiency sedimentation tank and enters the micro-vortex hydraulic mixer 2 through the water inlet pipe 1. In this pool, an automatic dosing device 4 is used to add coagulant, such as polymerized FeCl with a content of 41%. 3 , lime, etc., the dosage is automatically adjusted according to the water inflow. A common dosing room is set up at the operation site to store medicines, and it is equipped with a liquid medicine dispensing system. The coagulant added is stirred with a coagulation agitator 5 to fully contact the poll...

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Abstract

The invention provides a sewage advanced treatment and recycling method capable of substantially raising economy, comprising processes of high efficiency coagulation deposition, ozone oxidation and biochemical treatment, wherein the method is characterized in that a coagulation deposition stage integrates coagulation, flocculation, deposition and sludge backflow, a forced sludge outer circulation backflow mode is utilized, sludge concentration in a flocculation reaction is increased, contact flocculation and deposition net capturing effects of backflow sludge is fully utilized, and a removal rate of COD suspensions is raised, thereby substantially reducing a subsequent additive amount of ozone. In an ozone oxidation stage, COD in sewage id further removed by adding ozone, and biodegradability of sewage is raised. Ozone tail gas generated in the stage is converted into pure oxygen, which is collected and conveyed to a front biochemical stage for providing oxygen required for aeration, thereby reducing operation cost. Biochemical degraded COD generated in the ozone oxidation stage is removed by an aeration biological filtration pool in the biochemical treatment process.

Description

technical field [0001] The invention belongs to the field of sewage treatment and aims to provide a method using "coagulation sedimentation-ozone oxidation-biological aerated filter". This method has the advantages of significantly reducing the dosage of ozone, realizing the reuse of ozone tail gas, and reducing operating costs . Background technique [0002] Sewage reuse is the only way for enterprises to solve water shortage, improve the utilization rate of water resources, reduce production costs, reduce environmental pollution, and promote the sustainable development of enterprises. Some highly polluted wastewater can be treated according to the purification function of secondary treatment technology (such as activated sludge method) for urban sewage. Under normal circumstances, it will also contain a considerable amount of pollutants, such as BOD 5 20-30mg / l, COD60-100mg / l, suspended matter 20-30mg / l, NH 3 -N15-25mg / l. In addition, it may also contain toxic and harmf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/52C02F1/78
Inventor 王晓阳陈立辉闫清云韩小刚崔慧慧
Owner 北京翰祺环境技术有限公司
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