A coal mine sewage filtration treatment pool

Abstract

The invention relates to the field of coal mine sewage treatment equipment, in particular to a coal mine sewage filtration treating tank. The coal mine sewage filtration treating tank comprises a grating type primary reaction well, a secondary reaction catch basin and a contact oxidation transition well communicated with one another in sequence along the sewage flowing direction, the grating type primary reaction well, the secondary reaction catch basin and the contact oxidation transition well are separated from one another through two partitions, a sewage treatment device is arranged in the grating type primary reaction well and fixedly mounted at the bottom of the grating type primary reaction well, a stirring generation device is arranged in the secondary reaction catch basin, and the contact oxidation transition well comprises an contact oxidation reaction device which is mounted on the partition between the secondary reaction catch basin and the contact oxidation transition well. Through the process, the a coal mine sewage filtration treating tank is simple in process system, high in automation level requirement, small in floor area, low in project investment and running cost and good in treatment effect of ammonia nitrogen in sewage with an activated sludge process.

Description

technical field [0001] The invention relates to the field of coal mine sewage treatment equipment, in particular to a coal mine sewage filtration treatment tank. Background technique [0002] With the continuous strengthening of people's awareness of environmental protection, most of the domestic sewage will be discharged into the environment after a series of treatments to make the organic content, suspended solid concentration and ammonia nitrogen content meet the standards. [0003] With the continuous development of my country's coal industry, the discharge of domestic sewage from coal mines (including coal mine dormitories, bathhouses, canteens, office buildings, etc.) is also increasing. Compared with urban domestic sewage, coal mine domestic sewage generally has the following characteristics: Its organic content is low, pH is 7.3-8.3, CODcr is 50-250 mg·L-1, solid suspended matter SS concentration is 50-200 mg·L-1, ammonia nitrogen is 10-35 mg·L-1. [0004] There are ...

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Problems solved by technology

[0004] There are two main existing methods for treating domestic sewage in coal mines: activated sludge method and biofilm method. When using the existing activated sludge method to treat domestic sewage in coal mines, it is generally necessary to use a secondary settling tank for the outflow from the aeration tank. The mixed liquid is separated from mud and water, the supernatant is discharged, part of the concentrated activated sludge is returned to the aeration tank, and the rest is discharged to the sludge concentration tank as surplus sludge. The process system is complex, requires high automation, and occupies a large area. , the project investment and operation cost are high, and the treatment effect of ammonia nitrogen in sewage is not good by using activated sludge method

[0005] When using existing biofilm methods such as: biological contact oxidation process and biological aerated filter process to treat coal mine domestic sewage, the biological contact oxidation process sets fillers in the contact oxidation tank to make microorganisms grow on the surface of the fillers in the form of biofilms. To treat sewage, although it does not require sludge reflux and has no sludge bulking problem, its operation and management are simpler than the activated sludge method, but its water distribution and aeration are prone to unevenness, and at the same time, it needs the secondary sedimentation tank to settle and fall off biological Membrane and flocculent sludge have high project investment and operating costs. Although the biological contact oxidation process can effectively remove the content of organic matter in sewage, the removal rate of ammonia nitrogen and total nitrogen in sewage is low

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