Process for treating coal chemical waste water

Abstract

The invention relates to a process for treating coal chemical waste water, wherein a method combining active material adsorption and biochemical treatment is adopted. The method comprises the following steps of: firstly, introducing coal chemical waste water in a waste water regulating reservoir; secondly, introducing the waste water subjected to adsorption treatment by an adsorption tank into a clarification reservoir for sedimentation; then introducing the waste water subjected to the treatment of the clarification reservoir into a biochemical unit for biochemical treatment; and finally, introducing the waste water subjected to the biochemical treatment into a sedimentation reservoir for sedimentation treatment. In the technical scheme, macromolecular organic pollutants are removed through adsorption, therefore, the requirement of the subsequent biochemical treatment is met, and the problems of insufficient utilization of pores of activated carbon and incomplete exertion of the adsorbability of the activated carbon due to the influence of sludge when the activated carbon is added into an activated sludge aeration tank in the prior art are solved; and the process for treating coal chemical waste water has high efficiency and can sufficiently utilize the pores of the activated carbon and ensure the full exertion of the adsorbability of the activated carbon.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a coal chemical wastewater treatment process. Background technique [0002] Coal chemical industry refers to the industry that uses coal as raw material, converts coal into gas, liquid and solid products or semi-products through chemical processing, and then further processes them into chemical and energy products. During this process, a large amount of wastewater is discharged. At present, the commonly used coal chemical wastewater treatment process is divided into primary treatment, secondary treatment and advanced treatment. Primary treatment is pretreatment, including oil separation, air flotation, precipitation, hydrolysis and acidification, etc.; secondary treatment is mainly biochemical treatment, and activated sludge method is usually used to treat coal chemical wastewater; common methods of advanced treatment are coagulation sedimentation, advanced Oxidation, subsequent...

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that in the coal chemical industry wastewater treatment process of the prior art, activated carbon is added into the activated sludge aeration tank, and the pores of the activated carbon cannot be fully utilized due to the influence of the sludge, so that the activated carbon Therefore, an efficient coal chemical wastewater treatment process that can make full use of the pores of activated carbon and give full play to the adsorption capacity of activated carbon is proposed.

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