High-efficiency impact-resistant air floatation system and sewage treatment method thereof

Abstract

The invention discloses a high-efficiency impact-resistant air floatation system which mainly comprises a coagulation area, a first flocculation area, a second flocculation area and a mud-water separation area; a first stirring device, a second stirring device and a third stirring device are respectively arranged in the coagulation area, the first flocculation area and the second flocculation area; the mud-water separation area comprises a dissolved air floating area, a settlement area, a floating slag area and a clear water area; a dissolved air release head is arranged in a position where the dissolved air floating area is adjacent to the second flocculation area; a mud scraper is arranged at the edge, close to the floating slag area, of the dissolved air floating area. The high-efficiency impact-resistant air floatation system disclosed by the invention has the benefits that under the situation of fluctuation of influent SS from dozens of mg / L to 1000 mg / L, the effluent quality isstable; the treatment load is high, the effluent quality is good and stable, and meanwhile, the dosage of a flocculating agent and the flocculation reaction time can be reduced.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an impact-resistant high-efficiency air flotation system and a sewage treatment method thereof. Background technique [0002] The concentration of suspended solids in the effluent of biochemical tanks of many industrial sewage treatment plants fluctuates greatly with seasonal changes (such as low in winter and high in summer), or with changes in influent pollutants (including SS-suspended solids and COD-chemical oxygen demand) , the SS of the biochemical pool effluent will also fluctuate greatly; in the treatment of water bodies (such as black and odorous rivers, etc.), the SS entering the water body during the rainstorm season is much higher than usual and fluctuates greatly; when planning the utilization of rainwater resources, often The initial rainwater needs to be treated, and the initial rain also has the characteristics of large variation in SS. There...

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Problems solved by technology

[0003] Based on the shortcomings of the existing dissolved air flotation process, such as poor anti-suspension load impact ability, low processing load, and large floor space, combined with the characteristics and advantages of dissolved air flotation and inclined tube (plate) precipitation, an anti-suspension Fluctuation and impact of material load, and a new type of combined air flotation system with high hydraulic load and stable water quality

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