Multifunctional biological aerated filter for sewage treatment

Abstract

The invention discloses a multifunctional biological aerated filter for sewage treatment. The multifunctional biological aerated filter comprises a treating tank body, wherein a water inlet is formedin the lower end of the treating tank body; the water inlet is connected with a constant-temperature tank; a buffering and flow-stabilizing zone and a plurality of filtering mounting plates are arranged inside the treating tank body; an aerobic filter material layer and a hypoxic filter material layer are arranged inside the filtering mounting plates; accelerating backwashing mechanisms are further arranged inside the buffering and flow-stabilizing zone; a filtering and flow-slowing mechanism mounted on the side wall of the treating tank body is arranged inside the buffering and flow-stabilizing zone; the filtering and flow-slowing mechanism comprises a plurality of primary filter plates and a plurality of secondary filter plates which are uniformly fixed to two parallel side surfaces of the treating tank body; the primary filter plates and the secondary filter plates are arranged in a staggered manner; an S-shaped water flow passage is formed between the primary filter plates and thesecondary filter plates. The multifunctional biological aerated filter can filter suspended solids in sewage in time, so that the service life of a biological filtration membrane is prolonged; throughsewage water temperature pretreatment, the activity of the biological membrane is improved and the sewage treatment effect is improved.

Description

technical field [0001] The invention relates to the technical field of biofilm filtration, in particular to a multifunctional aerated biological filter for sewage treatment. Background technique [0002] Water pollution is one of the major environmental problems facing our country. With the development of my country's industry, the discharge of industrial sewage is increasing day by day. After the industrial wastewater that does not meet the discharge standard is discharged into the water body, it will pollute the surface water and groundwater. Industrial wastewater has a wide range of sources and complex components. Mainly from petroleum, petrochemical, steel, coking, gas generation stations, mechanical processing and other industrial sectors. Discharged into rivers, lakes or bays will pollute the water body and affect the survival of aquatic organisms; when used for agricultural irrigation, it will block the soil voids and hinder the growth of crops. After being dischar...

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Problems solved by technology

[0004] However, the existing biological aerated filter has inherent shortcomings. For example, due to the fast water flow in the filter, the floating matter in the sewage cannot be filtered in time, which greatly interferes with the biofilm filtration. The harm of destroying the biofilm, in addition, after using the biological aerated filter for a long time, a large amount of clean water is required to backwash the biological aerated filter, which greatly wastes clean water resources

At the same time, the temperature in the existing biological aerated filter is uncertain, and sometimes the expected reaction effect cannot be achieved under low temperature conditions

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