An anoxic-anaerobic-anoxic-aerobic-membrane module treating method

Abstract

Anoxic-anaerobic-anoxic-aerobic-membrane module treatment method, which belongs to the field of sewage treatment and environmental protection, anoxic-anaerobic-anoxic-aerobic-membrane module treatment method: sewage enters the pre-denitrification tank through the water inlet , the sewage is filtered through the biological filter bed in the pre-denitrification tank; the sewage filtered in the pre-denitrification tank enters the anaerobic tank, and the sewage is filtered through the biological filter bed in the anaerobic tank; the sewage filtered in the anaerobic tank enters the anoxic tank pool, the sewage is filtered through the biological filter bed in the anoxic pool; the sewage filtered in the anoxic pool enters the aerobic pool, and the sewage is filtered through the biological filter bed in the aerobic pool; the sewage filtered in the aerobic pool enters the membrane pool, and the sewage passes through The MBR membrane module in the membrane pool is filtered; the sewage filtered by the MBR membrane module in the membrane pool is discharged through the outlet pipe under the action of negative pressure; the biodegradable organic pollutants in the water are removed by activated sludge, and the membrane is used to purify The final water and activated sludge are separated into solid and liquid; it can be widely used in the field of sewage treatment and environmental protection.

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: A3O is an improved nitrogen and phosphorus removal process (that is, pre-denitrification-an...

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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 will undergo denitrification under anoxic conditions, generating air bubbles in the water, and driving the sludge at the bottom to float up. This will lead to the increase of suspended solids in the effluent of the system, and the water quality will not meet the standard.

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