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Treatment method of coal chemical waste water

A coal chemical wastewater and treatment method technology, applied in the field of coal chemical industry, can solve the problems of difficult treatment, complicated operation, high operating cost, etc., and achieve the effect of strong practicability, simple management and good treatment effect

Active Publication Date: 2015-01-28
BEIJING GEOENVIRON ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems are: high operating cost, complicated operation, difficult to meet the standard
In the traditional wastewater treatment process, only nitrification can be carried out in the aerobic aeration tank, and denitrification can only be achieved by de-digestion in the anoxic tank

Method used

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Effect test

example 1

[0029] Such as figure 1 Shown, the present invention provides a kind of treatment method of coal chemical industry wastewater, comprises the following steps:

[0030] The invention provides a treatment method for coal chemical wastewater, comprising the following steps:

[0031] 1) The wastewater that needs to be treated removes suspended coal tar through the gravity oil separation method;

[0032] 2) Use 30-50mg / L coagulant PAC (polyaluminum chloride, commercially available) or PAM (polyacrylamide, commercially available) to coagulate and settle to remove fine suspended solids and emulsified oily substances in wastewater, and the settling time 0.5-1.0h;

[0033] 3) The effluent after coagulation and sedimentation enters the UASB anaerobic reactor for anaerobic dephenolization treatment. Oxygen dephenolization treatment is added with anaerobic dephenolization bacteria ZHB655 (purchased from Beijing Zhongheng Huitong Environmental Technology Co., Ltd.), and the dosage is 0....

Embodiment 2

[0039]Embodiment 2 Treatment method of the present invention and SBR effect comparative test

[0040] In order to verify the effect of the treatment method described in the present invention, under the same condition of influent water quality, we adopted the treatment described in the present invention on April 1, 2011 at the waste water treatment site of Ningxia Shenhua Coal DME plant The method was compared with the treatment method dominated by activated sludge method SBR for a period of one month (see Table 1). L, ammonia nitrogen is less than 15 mg / L. Wherein, the designed treatment water volume Q=30L / h of the treatment method of the present invention, effective hydraulic retention time is 6.6 hours, all the other process conditions are the same as embodiment 1, and the main process conditions of comparative process (SBR+Fenton oxidation) are set as: The operation period of SBR single tank is 8 hours, and the sludge load is 0.2 Kg BOD 5 / (Kg MLSS·d); the concentration o...

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Abstract

The invention relates to a treatment method of coal chemical waste water. The method comprises the following steps: oil separation, coagulating sedimentation, anaerobic dephenolization, a peristalsis bed, catalytic ozonation, an MBR (Membrane Bio-Reactor) and a clean water reservoir. The coal chemical waste water is treated through the combination of anaerobic dephenolization, the peristalsis bed, catalytic ozonation, the MBR and the like, and the first-grade emission standard of Integrated Wastewater Discharge Standard GB8978-1996 can be met. The purposes of simultaneously removing ammonia nitrogen and total nitrogen while removing COD (Chemical Oxygen Demand) in the peristalsis bed are achieved through fixing an aerobic denitrification microorganism ZHB35 in a biocarrier of the peristalsis bed, moreover, the removal of total phosphorous can be promoted. The treatment method has strong practicability, is suitable for new construction, upgrading and reconstruction engineering of waste water plants, can effectively reduce capital investment and running cost, and has the advantages of impact load resistance, simplicity in management, stable running, great treatment effect and the like.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a treatment method for coal chemical wastewater. Background technique [0002] Coal chemical wastewater has complex components and is very difficult to treat. The traditional coal chemical wastewater treatment process is: oil separation-air flotation-sedimentation-biochemical (activated sludge method A / O, SBR, etc.)-activated carbon adsorption or Fenton oxidation. The main problems are: high operating cost, complicated operation, and difficult to meet the standard. The main problem of regulating tank, oil separation, air flotation, coagulation and sedimentation, biochemical (activated sludge method A / O, SBR, etc.) is that the operation cost is very high, and the main pollutant in coal chemical wastewater is coal tar, among which The content of phenols is the highest. Phenols are easily oxidized into quinones that are more difficult to biodegrade in the presence o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F3/1268C02F3/2846C02F9/00
Inventor 胡志忠金晶罗彬洪慧兰王正中肖岳松张静吴通
Owner BEIJING GEOENVIRON ENG & TECH
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