Mine shaft sewage treatment process

Abstract

The invention discloses a mine shaft sewage treatment process, and relates to the technical field of sewage treatment. The mine shaft sewage treatment process comprises that mine shaft sewage enters aregulating pool, and is subjected to water amount and water quality regulating; the regulated mine shaft sewage enters a flocculation reaction precipitator, sodium hydroxide is added to adjust the pHvalue of the mine shaft sewage, lime milk is added, and hardness reducing treatment is performed by using a lime softening method; PAC and PAM are added, flocculation precipitation treatment is performed, and finally solid-liquid separation is performed; the supernatant after the solid-liquid separation is lifted to the high-position water box of a gravity valve-free filtering water pool by a pump through a middle pool, and is filtered, the effluent enters a reuse water pool, a disinfectant is added, and disinfection treatment is performed; and the sludge after the solid-liquid separation isdischarged into a sludge concentration pool, PAM is added, flocculation precipitation is performed, the supernatant refluxes to the regulating pool, the sludge is sucked to a filter press by a sludgepump, and is dewatered, and the dried sludge is externally transported. According to the present invention, by using the treatment process of coagulation, precipitation and filtration, the turbidity,the hardness and the chrominance in mine shaft wastewater can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment process for mine sewage. Background technique [0002] China is rich in coal resources, and its annual output ranks first in the world. In the process of coal mining, groundwater comes into contact with coal seams and rock formations, coupled with the influence of human activities, a series of physical, chemical and biochemical reactions occur and penetrate into the roadway to generate a large amount of coal. The mine sewage needs to be discharged for safe production. [0003] The water quality of mine sewage has obvious characteristics of the coal industry: due to a large amount of coal dust, rock dust, man-made pollution and microorganisms entering the water, the SS content of suspended solids in mine water is much higher than that of surface water, the sensory properties are poor, and the particle size of suspended solids contained Small, light specific g...

AI Technical Summary

Problems solved by technology

[0003] The water quality of mine sewage has obvious characteristics of the coal industry: due to a large amount of coal dust, rock dust, man-made pollution and microorganisms entering the water, the SS content of suspended solids in mine water is much higher than that of surface water, the sensory properties are poor, and the particle size of suspended solids contained Small, light specific gravity, slow settling speed, poor coagulation effect; mine water also contains waste engine oil, emulsified oil and other organic pollutants

Images