Black and odorous water body multi-stage purification system and multi-stage purification technique

Abstract

The invention relates to the field of water treatment, in particular to a multi-stage purification system for black and odorous water and a multi-stage purification process. The black and odorous water multi-stage purification system includes a sedimentation zone, an anaerobic zone, a biological contact oxidation zone and an aquatic plant zone which are sequentially arranged along the water flow direction; the biological contact oxidation zone and the aquatic plant zone are equipped with aeration The aeration tube is connected to the aerator; the biological contact oxidation zone is also provided with suspended biological fillers and microbial strains, and the volume of the microbial strains is 1‰‑5‰ of the water storage in the river. The above-mentioned black and odorous water multi-stage purification system has low economic cost, easy construction and maintenance, high treatment effect and efficiency, wide application range (suitable for point source and non-point source pollution control of water bodies), and can effectively control domestic sewage and some industrial wastewater , effectively prevent and remove pollutants in the river, and purify the water environment. After the water body is purified by the system, it can reach the standard of surface water V and above.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a multi-stage purification system for black and odorous water and a multi-stage purification process. Background technique [0002] At present, the water ecological restoration technologies adopted at home and abroad mainly include physical methods, chemical methods and biological-ecological methods. Physical methods include mechanical algae removal, dredging of sediment, water diversion and dilution through engineering measures, but they often treat the symptoms but not the root cause, and can only be used as emergency measures to deal with sudden water pollution. Chemical methods include adding chemical agents to kill algae, adding iron salts to promote the precipitation of phosphorus, and adding lime to denitrify, etc., but they are expensive, easy to cause secondary pollution, and cannot fundamentally restore the structure and function of aquatic ecosystems. Bio-ecological met...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-stage purification system and multi-stage purification p

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