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A kind of treatment method of coal chemical industry wastewater

A technology of coal chemical waste water and treatment method, applied in the field of coal chemical industry, can solve the problems of high operation cost, difficult to meet the standard of treatment, complicated operation, etc., and achieve the effects of good treatment effect, strong practicability and simple management

Active Publication Date: 2016-02-24
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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  • A kind of treatment method of coal chemical industry wastewater
  • A kind of treatment method of coal chemical industry wastewater

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Comparison scheme
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 processing 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 15mg / 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 cycle of SBR single tank is 8 hours, and the sludge load is 0.2KgBOD 5 / (KgMLSS·d); the concentration of hy...

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Abstract

The invention relates to a treatment method for coal chemical industry wastewater. The method comprises the following steps: oil separation-coagulation sedimentation-anaerobic dephenolization-peristaltic bed-ozone catalytic oxidation-MBR-clear water tank. The present invention treats coal chemical wastewater by coupling anaerobic dephenolization with peristaltic bed, ozone catalytic oxidation, MBR, etc., and can reach the first-level discharge standard of "Comprehensive Sewage Discharge Standard" GB8978-1996; and through the peristaltic bed The aerobic denitrification microorganism ZHB35 is immobilized inside the biological carrier to realize the removal of ammonia nitrogen and total nitrogen while removing COD in the peristaltic bed pool, and can also promote the removal of total phosphorus. The invention has strong practicability, is suitable for newly-built waste water plants and upgrading and renovation projects, can effectively save infrastructure investment and operating costs, and has the advantages of impact load resistance, simple management, stable operation, and good treatment effect.

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 Patents(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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