Aeration type sewage treatment device and method

Abstract

The invention mainly discloses an aeration type sewage treatment device and method. The technical scheme is as follows: the device comprises a primary sedimentation tank, a biodegradation tank and a disinfection tank, wherein a filtering device is arranged in the primary sedimentation tank and comprises a filtering plate and a collection box; the biodegradation tank comprises a facultative tank, an aerobic tank and a clarifying tank in mutual connection; a biological packing frame is arranged in the facultative tank; an aeration device is arranged in the aerobic tank and comprises a lifting cylinder, a spiral aerator and a rotating disk; the spiral aerator is mounted on the upper side of the lifting cylinder; a rotating shaft of the spiral aerator penetrates the rotating disk; and aerobic microbial packing is arranged on the rotating disk. Particle impurities of sewage are removed by the primary sedimentation tank, and then the sewage enters the biodegradation tank for reacting and finally is subjected to disinfection treatment. In the invention, through multi-stage treatment of the sewage, harmful substances in the sewage are separated and degraded better, the blocking phenomenon does not happen frequently, the treatment efficiency is high while the effect is good, and the treated sewage reaches the national discharge standard.

Description

technical field [0001] The invention relates to an aeration type sewage treatment device and method. Background technique [0002] High-concentration organic wastewater discharged from food, biology, chemical and other industries contains a large amount of ammonia, nitrogen, phosphorus, etc., and is discharged into rivers and lakes to cause eutrophication of water bodies. Eutrophication of water body refers to that nutrients such as nitrogen and phosphorus required by organisms enter lakes, estuaries, bays and other slow-flowing water bodies in large quantities, causing algae and other plankton to multiply rapidly, the dissolved oxygen in the water body decreases, and the water quality deteriorates. The phenomenon of mass death of living things. In recent years, the problems of water environmental pollution and water eutrophication have become increasingly serious, and organic matter, nitrogen, and phosphorus are the main factors causing water eutrophication. The more stri...

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Problems solved by technology

Among the existing sewage treatment equipment, the common equipment is that sewage is treated through sedimentation tanks, biodegradation tanks, etc. With the development of economy and the advancement of urbanization, the discharge of industrial sewage has increased significantly. The rapid increase in population has caused great changes in the amount and quality of sewage entering urban sewage treatment plants, mainly manifested in a substantial increase in the amount of sewage and an increase in the pollutant indicators of sewage inflow. Overload operation, the water quality is difficult to guarantee, and the sewage discharge standard cannot be met; in addition, some low-concentration and easily degradable wastewater can be treated by a combination of traditional processes, but there is still a lack of effective methods for some high-concentration and poorly biodegradable wastewater. and economical way

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