Anaerobic-anoxic-aerobiotic-aerobiotic-membrane component treatment method

Abstract

The invention discloses an A2O2+MBR treatment method, and belongs to the technical field of environment friendliness, and sewage treatment reutilization. The method is characterized in that sewage enters an anaerobic pool through a water inlet, and is filtered by a biological filter bed in the anaerobic pool; preliminarily filtered sewage in the anaerobic pool enters an anoxic pool and is filtered by a biological filter bed in the anoxic pool; sewage filtered in the anoxic pool enters a micro-aerobic pool and is filtered by a biological filter bed in the micro-aerobic pool; sewage filtered in the micro-aerobic pool enters an aerobiotic pool and is filtered by a biological filter bed in the aerobiotic pool; sewage filtered by the aerobiotic pool enters a membrane pool and is filtered by an MBR membrane component in the membrane pool; and sewage filtered by the MBR membrane assembly in the membrane pool is removed through a water outlet under action of negative pressure. The method realizes efficient solid-liquid separation, water quality of outlet water is excellent and stable, amount of residual sludge is less, floor space is small, degradation-resistant organic substances are removed, and the defect that sludge expanding is easily generated by conventional active sludge is overcome. The method can be widely applied to the swage treatment field.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to the fields of sewage treatment, water resource filtration biological treatment and reuse. Background technique [0002] In the field of environmental protection, especially sewage treatment is an important link in today's urban and rural water supply and drainage projects. The renewal and upgrading of existing urban sewage treatment plants, especially water plants whose effluent water quality is difficult to meet the standard or the treatment flow has increased sharply and the area cannot be expanded; no drainage pipes Residential areas, tourist resorts, scenic spots, etc.; areas or places that require sewage reuse, such as hotels, car washes, airliners, and mobile toilets, all require sewage treatment equipment. The existing sewage treatment equipment processes include: A2O2 (i.e. anaerobic-anoxic-microoxic-aerobic activated sludge method), A1: anaerobic tank,...

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Problems solved by technology

On the one hand, the secondary settling tank has continuous water inflow and continuous water outflow. Due to the flow of water, it will bring a certain amount of agitation, which will not only affect the natural settlement of the sludge, but also the settled sludge at the bottom of the secondary settling tank will also be affected by the water flow. On the other hand, the sludge deposited at the bottom of the secondary settling tank, under long-term anoxic conditions, the sludge will undergo denitrification, generate air bubbles in the water, and drive the bottom The sludge floats up, which will lead to an increase of suspended solids in the effluent of the system, and the water quality is not up to standard

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