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A treatment method for high-concentration coal gasification wastewater

A treatment method, coal-to-gas technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high treatment operation cost, low biochemical degradation efficiency, pretreatment process Many problems, to achieve the effect of reducing the physical and chemical pretreatment process section, high efficiency of biochemical treatment, shortening the treatment process

Active Publication Date: 2019-12-27
新疆凯旋致远生物技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problems of many pretreatment procedures, low treatment efficiency, low biochemical degradation efficiency, high investment and high treatment and operation cost in the high-concentration coal-gas wastewater treatment method in the current coal-to-gas industry, and provides a Treatment Method of High Concentration Coal Gas Wastewater

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, the high-concentration coal gasification waste water recovered by phenolic ammonia is used as raw water, the concentration of CODcr is 7890 mg / L, the concentration of volatile phenol is 475 mg / L, and the concentration of mineral oil is 583 mg / L;

[0032] 1. The anaerobic and aerobic process sections adopt composite bioreactors. At the beginning of the biochemical system, porous microbial carriers are filled in the anaerobic and aerobic bioreactors at the same time. The filling volume of the anaerobic bioreactor is 20% (v / v), the filling volume of the aerobic bioreactor is 20% (v / v); at the same time, add 1 g / L of broad-spectrum microbial strains to the anaerobic and aerobic bioreactors; add 0.02 g of microbial active agent / L and adding high-concentration coal gas waste water for microbial screening, domestication, and fixation. The water temperature is controlled within the range of 35±2°C, and the initial microbial fixation takes 3 days;

[0033]...

Embodiment 2

[0040] In this embodiment, high-concentration coal gasification wastewater recovered from phenolic ammonia is used as raw water, and its CODcr concentration is 6470 mg / L, volatile phenol concentration is 290 mg / L, and mineral oil concentration is 155 mg / L;

[0041]1. The anaerobic and aerobic process sections adopt composite bioreactors. At the beginning of the biochemical system, porous microbial carriers are filled in the anaerobic and aerobic bioreactors at the same time. The filling volume of the anaerobic bioreactor is 15% (v / v), the filling volume of the aerobic bioreactor is 15% (v / v); at the same time, 1g / L of broad-spectrum microbial strains are added to the anaerobic and aerobic bioreactors respectively; 0.01g / L of microbial active agent is added L and adding high-concentration coal gasification wastewater for microbial screening, domestication, and fixation. The water temperature is controlled within the range of 35±2°C, and the initial microbial fixation takes 3 d...

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Abstract

The invention provides a treatment method of high-concentration coal gasification wastewater. The treatment method comprises steps as follows: anaerobic, aerobic, coagulating and precipitating treatment technologies are adopted; hybrid biological reactors are adopted for anaerobic and aerobic process sections, when a biochemical system starts, the anaerobic and aerobic hybrid biological reactors are filled with porous microbial carriers, meanwhile, broad-spectrum microbial strains, a microbial activator and high-concentration coal gasification wastewater obtained after phenol ammonia recovery are added, and microbiological screening, domestication and immobilization are performed; after microorganism immobilization, the high-concentration coal gasification wastewater obtained after phenol ammonia recovery directly enters the anaerobic biochemical treatment process section for treatment without being subjected to pretreatment processes including demulsification, oil removal, air flotation, dilution and the like, and the broad-spectrum microbial strains and the microbial activator are added while the high-concentration coal gasification wastewater is continuously fed into the anaerobic hybrid biological reactor. The multi-stage aerobic hybrid biological reactors are adopted, and the first-stage aerobic hybrid biological reactor contains no dissolved oxygen. According to the method, the removal rate of CODcr is higher than or equal to 97%, the removal rate of volatile phenol is higher than or equal to 99.9%, and the removal rate of mineral oil is higher than or equal to 99.9%.

Description

technical field [0001] The invention relates to a treatment method for waste water from coal gasification. Background technique [0002] my country is a country with a lot of coal but little oil and natural gas. Coal-to-gas is an important coal chemical project to solve the shortage of oil and natural gas in our country. In recent years, the coal chemical industry has developed rapidly, and many provinces and autonomous regions have successively established several coal-to-gas demonstration projects. At present, the coal-to-gas chemical industry is developing rapidly. However, the coal-rich areas in my country are generally water-scarce areas, such as Inner Mongolia, Shaanxi, Shanxi, and Xinjiang. The coal-to-gas project is a project that consumes a lot of water and discharges a lot of pollutants. For coal-to-gas projects built in places where water resources are scarce, there is an urgent need for a feasible high-concentration coal-to-gas wastewater treatment process to en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 王毅强王毅刚黄硕李治远王培武
Owner 新疆凯旋致远生物技术有限公司