Efficient and energy-saving sewage treatment system and treatment method

Abstract

The invention discloses an efficient and energy-saving sewage treatment system which comprises a pre-filtration system, first-stage microfiltration equipment, a double-microgenerator, a denitrification tank, an adjusting tank, a potential energy biological sewage purifier, a denitrification backflow system, second-stage microfiltration equipment, a sludge recycling system and a disinfection sedimentation tank which are sequentially arranged in the sewage flowing direction. Effluent of the pre-filtration system flows into first-stage microfiltration equipment, and impurities such as small particles which cannot be removed in the oil separation sedimentation tank are removed in the first-stage microfiltration equipment; the double micro-generators realize effective anaerobic and micron-sized filtration; the potential energy biological sewage purifier realizes a multi-stage A / O process. The sewage treatment device has the characteristics of good effluent index and low electric energy consumption, and the treated sewage can reach the main standard of class III water in Environmental Quality Standard for Surface Water.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to an efficient and energy-saving sewage treatment system. Background technique [0002] Sewage treatment system refers to the use of professional sewage treatment equipment to treat sewage generated in daily activities to meet discharge standards. The existing sewage treatment methods generally use sewage sedimentation tanks to precipitate impurities in sewage, and anaerobic aerobic treatment to remove organic matter in the water, and the treatment period is long. [0003] Chinese Patent: 201720857431.9 discloses a high-efficiency treatment system for urban sewage, which uses multi-stage treatment equipment to treat sewage, degrades small molecular pollutants in sewage, and deep filtration of sewage by membrane modules, but this sewage The treatment system needs to consume a lot of electric energy, and the purification treatment cost is high, which does not meet the environmental prote...

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Problems solved by technology

[0003] Chinese patent: 201720857431.9 discloses a high-efficiency treatment system for urban sewage, which uses multi-stage treatment equipment to treat sewage, degrades small molecular pollutants in sewage, and at the same time, membrane modules perform deep filtration of sewage, but this sewage The treatment system needs to consume a lot of electric energy, and the cost of purification treatment is high, which does not meet the environmental protection concept of low carbon and energy saving

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