Single-sludge biological flocculation adsorption-hydrolytic acidification-biological denitrification sewage treatment system and method

Abstract

The invention relates to a single-sludge biological flocculation adsorption-hydrolytic acidification-biological denitrification sewage treatment system and a method. The single-sludge biological flocculation adsorption-hydrolytic acidification-biological denitrification sewage treatment system comprises a biological flocculation adsorption mechanism, a solid-liquid separation mechanism, a carbon source storage mechanism and an A2 / O biological denitrification mechanism; the biological flocculation adsorption mechanism comprises a biological flocculation adsorption tank; the solid-liquid separation mechanism comprises a primary precipitation mechanism and a secondary precipitation mechanism; one end of the biological flocculation adsorption tank is connected with a sewage inlet end, and an output end is connected with the primary precipitation mechanism; a solid output end of the primary precipitation mechanism is connected with the carbon source storage mechanism, a liquid output end ofthe primary precipitation mechanism is connected with the A2 / O biological denitrification mechanism, an output end of the A2 / O biological denitrification mechanism is connected with the secondary precipitation mechanism, and an output end of the secondary precipitation mechanism is used for discharging treated sewage outwards. According to the single-sludge biological flocculation adsorption-hydrolytic acidification-biological denitrification sewage treatment system, a biological flocculation adsorption process, an A2 / O process and a hydrolytic acidification process are organically combined,so that various forms of organic matters in the sewage can be removed, and the problem of insufficient carbon sources in a traditional denitrification process can be solved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a single sludge biological flocculation adsorption-hydrolysis acidification-biological denitrification sewage treatment system and method. Background technique [0002] The phenomenon of low C / N ratio is common in urban sewage in my country, which leads to the problem of insufficient carbon source during biological denitrification and denitrification, which reduces the effect of nitrogen and phosphorus removal. The content of organic matter in urban sewage in southern my country is lower than that in northern China, and the problem of insufficient carbon sources is more prominent. Therefore, providing sufficient and effective carbon sources for the process of biological denitrification and denitrification can greatly improve the efficiency of biological denitrification and phosphorus removal in sewage plants in my country. The question is of great significanc...

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Problems solved by technology

Many sewage plants at home and abroad add methanol as an external carbon source in the process of biological denitrification, but methanol has the disadvantages of toxicity and high price. Therefore, the development of some economical new external carbon sources has become the focus of many researchers.

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