Rural domestic wastewater treatment device and method based on MBBR coupling anaerobic-aerobic process integration

Abstract

The invention discloses a rural domestic wastewater treatment device based on MBBR coupling anaerobic-aerobic process integration. The device comprises an MBBR anaerobic chamber, an MBBR anoxic chamber and an MBBR aerobic chamber, a large amount of anaerobic bacteria are enriched in the MBBR anaerobic chamber for anaerobic hydrolysis, wastewater enters the device, a large amount of sulfur autotrophic denitrifying bacteria are enriched in the MBBR anoxic chamber for denitrification, and a large amount of nitrifying bacteria and phosphorus phagocytosis bacteria are enriched in the MBBR aerobic chamber. Gravity curved screens and sedimentation tanks are additionally arranged at the water outlet tail ends of the anaerobic tank and the aerobic tank, so that the flow of MBBR filler and activated sludge is ensured, the defect that the biological population ecology is influenced by drifting of suspended filler in different stages in the MBBR is overcome, and the nitrogen and phosphorus removal efficiency is improved. The system not only retains the advantages of large specific surface area and high efficiency of the MBBR, but also can greatly reduce the generation of excess sludge, and can realize regulation and control of nitrogen and phosphorus indexes of rural domestic wastewater.

Description

technical field [0001] The invention relates to a rural domestic wastewater treatment device and method based on MBBR coupled anaerobic-aerobic process integration, belonging to the field of environmental technology and water treatment. Background technique [0002] With the increasing emphasis of human beings on environmental protection, the sharp increase in the discharge of rural domestic wastewater, and the increasingly stringent requirements of the country on sewage treatment, countries around the world, including my country, have proposed more and more standards for sewage treatment rates and sewage treatment. The traditional biochemical process has been difficult to meet the ever-increasing requirements in terms of processing versatility, high efficiency, stability and economic rationality. [0003] MBBR (Moving-Bed Biofilm Reactor, moving bed biofilm reactor) is a new type of biofilm reactor, which is an improvement developed on the basis of fixed bed reactor, fluidiz...

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Problems solved by technology

[0002] With the increasing emphasis of human beings on environmental protection, the sharp increase in the discharge of rural domestic wastewater, and the increasingly stringent requirements of the country on sewage treatment, countries around the world, including my country, have proposed more and more standards for sewage treatment rates and sewage treatment. With higher and higher requirements, the traditional biochemical process has been difficult to meet the ever-increasing requirements in terms of processing versatility, high efficiency, stability and economic rationality

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