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Coking plant wastewater treatment process

A waste water treatment and process technology, applied in water/sewage treatment, anaerobic digestion treatment, natural water treatment, etc., can solve the problems of effluent COD not up to standard, low sludge dehydration efficiency, complex coking sewage treatment process, etc., to improve Sludge dewatering efficiency, reducing effluent COD, and increasing sedimentation performance

Pending Publication Date: 2020-02-11
新晃县污水处理有限责任公司
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a coking plant wastewater treatment process, which solves the problem that the existing coking sewage treatment process is complex, and the effluent COD does not meet the standard due to the insufficient denitrification carbon source contained in the coking wastewater, and the sewage The problem of low mud dewatering efficiency

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  • Coking plant wastewater treatment process

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] The present invention provides a technical solution: a coking plant wastewater treatment process includes the following steps:

[0029] Step 1: Waste water adjustment, the production waste water and domestic sewage from each workshop are unified into the adjustment tank;

[0030] Step 2: Anaerobic acidification treatment, anaerobic acidification of wastewater, phenol, xylenol, quinoline, isoquinoline, indole, pyridine and other heterocyclic compounds in the wastewater have been greatly transformed or removed;

[0031] Step ...

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Abstract

The invention relates to the technical field of coking plant wastewater treatment, in particular to a coking plant wastewater treatment process. Specifically, a sodium carbonate solution is added in an aerobic section to provide alkalinity required by nitration reaction, ammonia nitrogen can basically be converted into nitrate nitrogen completely, at the same time, organic matters can be further degraded, so that the COD (Chemical Oxygen Demand) of final effluent water can reach the standard. According to the invention, after aerobic treatment, part of the wastewater flows back into an anoxictank to provide nitrate nitrogen for an anoxic section. According to the process provided by the invention, polyaluminum chloride or polyaluminum ferric chloride is added to the coagulation part, so that the precipitation performance of sludge at the precipitation part is improved, and the COD of effluent water is further reduced. According to the invention, cationic polyacrylamide is added into aconcentration tank to carry out flocculation reaction with sludge, so that the sludge dehydration efficiency is improved.

Description

Technical field [0001] The invention relates to the technical field of wastewater treatment in a coking plant, in particular to a wastewater treatment process in a coking plant. Background technique [0002] The treatment of coking waste water is the last process of coking gas purification. Coking wastewater contains a large number of harmful substances that harm the human body and pollute the environment. Phenol can cause acute or chronic poisoning, stimulate the respiratory center, induce neurological disorders, and damage liver and kidney function. Phenols in water exceeding 10mg / L can cause a large number of fish deaths. Cyanide can cause central nervous system poisoning, causing paralysis and suffocation. Ammonia and sulfide are also toxic to the human body. [0003] However, the existing coking wastewater treatment process is complicated. Due to the insufficient denitrification carbon source contained in the coking wastewater, the COD of the effluent does not meet the sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/147C02F103/34C02F101/16C02F101/30
CPCC02F9/00C02F11/147C02F2103/34C02F3/28C02F3/302C02F1/5236C02F2101/16C02F2101/30
Inventor 杨仕勇甘文建王新友杨静龙国田刘莉娟
Owner 新晃县污水处理有限责任公司
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