Anoxic-anaerobic-anoxic-aerobic-membrane assembly treatment device

Abstract

The invention discloses an anoxic-anaerobic-anoxic-aerobic-membrane assembly treatment device. An A3O+MBR (Membrane Bio-Reactor) treatment device comprises a water inlet, a pre-denitrification tank, an anaerobic tank, an anoxic tank, an aerobic tank, a membrane tank, spherical filler, MBBR (Moving Bed Biofilm Reactor) filler, a water outlet pipe, an inspection hole, aeration devices, a sludge backflow pipe, a denitrification liquid return pipe, a self-sucking pump, an MBR membrane assembly, an aeration head, an aeration branch pipe, an aeration main pipe, a gas adjusting valve, aeration equipment and a biological filter bed, wherein the spherical filler is placed in the biological fiber bed and is immobilized; the MBBR filler is placed in the aerobic tank and is mobilized; the MBR membrane assembly is mounted in the membrane tank; the aeration devices are arranged in the aerobic tank and the membrane tank; biodegradable organic pollutants in water can be removed by active sludge, and solid-liquid separation on the purified water and active sludge is carried out by adopting a membrane; the device can be widely applied to the environment protection field of sewage treatment.

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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