Sewage treatment system

Abstract

The invention discloses a sewage treatment system. The sewage treatment system comprises a primary settling tank, an anaerobic tank, an aerobic tank and a secondary settling tank, which are sequentially communicated, and also comprises an air compressor connected with the aerobic tank, wherein the aerobic tank comprises a plurality of fixed lattices sequentially arranged at the front end, a plurality of movable lattices sequentially arranged at the tail end, bioassay parts arranged in the lattices and a central main control module connected with the bioassay parts, adjacent lattices are separated by a guide wall, an opening is reserved between each guide wall and the side wall of the lattice, a movable check plate is arranged near the opening of the guide wall of the movable lattice, the movable check plate is used for closing the opening of the guide wall, and the movable lattices are respectively provided with a mixed liquor outlet. The sewage treatment system can flexibly regulate the effective capacity of the aerobic tank, guarantees the effluent to meet the standard and avoids excessive aeration in subsequent steps, and can lower the aeration energy consumption sharply.

Description

technical field [0001] The invention relates to the technical field of environmental resources, in particular to a sewage treatment system. Background technique [0002] In the urban sewage treatment process, the pre-denitrification denitrification system is one of the commonly used continuous flow activated sludge processes. In the process of sewage denitrification treatment, the aerobic tank is an important place to carry out nitrification reaction and reduce organic matter. The ideal situation is to complete the nitrification reaction in the last compartment of the aerobic tank, so as to avoid excessive aeration. , however, in practical situations, it is difficult to control this level. This is due to the scale of the sewage treatment plant and the setting of operating parameters. Generally, the amount of treated water and operating parameters are determined according to the design period of 10 to 20 years. In the early stage of operation, the amount of sewage treatment...

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Problems solved by technology

Moreover, in order to prevent the activated sludge from settling in the aerobic tank, the mixed solution needs to continue to flow to the outlet during the aeration process, which will inevitably result in waste of energy consumption (aeration energy consumption accounts for 50% of the total energy consumption of the activated sludge process~ 70%)

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