Combination method of coal chemical industry wastewater treatment

A technology of coal chemical wastewater and water holding capacity, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low biochemical degradation efficiency, poor effluent quality, and low treatment efficiency problems, to achieve the effects of fast biochemical degradation, reduced biochemical treatment load, and high treatment efficiency

Inactive Publication Date: 2012-09-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problems of low biochemical degradation efficiency, low treatment efficiency and poor effluen...

Method used

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  • Combination method of coal chemical industry wastewater treatment
  • Combination method of coal chemical industry wastewater treatment

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specific Embodiment approach 1

[0022] Specific embodiment one: a kind of combined method of coal chemical industry wastewater treatment in this embodiment is carried out according to the following steps:

[0023] 1. The coal chemical industry wastewater is first degreased through the grease trap, and the hydraulic retention time is 20~30min; among them, the grease trap adopts a sloping plate type grease trap, and the sloping plate material is made of polyester fiberglass;

[0024] 3. The coal chemical wastewater treated by the grease trap is passed into the hydrolysis acidification tower, the hydraulic retention time is controlled at 1.5~3h, the pH value is controlled at 5.0~6.5, and the water temperature is controlled at 25~35°C; among them, the hydrolysis acidification tower is made of steel system structure;

[0025] 3. The coal chemical wastewater treated by the hydrolysis and acidification tower is passed into the anaerobic fluidized bed, the temperature is controlled at 20-35°C, and the carrier in the...

specific Embodiment approach 2

[0035] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the microbial load in the anaerobic fluidized bed described in step 3 is 18g / L~28g / L, and the carrier loading is 11%~by volume percentage 14%. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0036] Embodiment 3: This embodiment differs from Embodiment 1 in that: the microbial load in the anaerobic fluidized bed described in step 3 is 23 g / L, and the loading amount of the carrier is 13% by volume. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention provides a combination method of coal chemical industry wastewater treatment and relates to a coal chemical industry wastewater treatment method. The method aims at solving the problems of low biochemical degradation efficiency, low treatment efficiency and poor water outlet quality in the existing coal chemical industry wastewater treatment method. The method is realized through the following steps that coal chemical industry wastewater is firstly subjected to oil removal treatment through an oil separation pool; then, the coal chemical industry wastewater is introduced into a hydrolysis acidification tower, and organic substances difficult to degrade are decomposed; next, organic substances are treated and degraded through an anaerobic-aerobic fluidized bed coupling and biochemical system; and finally, the coal chemical industry wastewater is introduced into a coagulative precipitation pool for precipitation treatment, sludge is externally discharged, and effluent flows into a clean water pool. The invention provides a coal chemical industry wastewater treatment method which has the advantages of investment saving, good treatment effect and high process stability, and is applied to the coal chemical industry field.

Description

technical field [0001] The invention relates to a method for treating coal chemical wastewater. Background technique [0002] Coal chemical wastewater refers to the wastewater generated during the pretreatment and treatment of coal processing, mainly including gas-making wastewater, purification and washing wastewater, and wastewater generated from other coal products. It is one of the current difficult-to-treat industrial wastewater. The coal chemical industry has many and complex production processes and consumes a lot of water. Moreover, the composition of wastewater is extremely complex, and the organic pollutants contained include phenols, polycyclic aromatic compounds, and heterocyclic compounds containing nitrogen, oxygen, and sulfur, etc. It is a typical industrial wastewater containing refractory organic compounds. The easily degradable organic substances in wastewater are mainly phenolic compounds and benzene compounds; pyrrole, naphthalene, furan, and imidazole a...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 韩洪军李志远
Owner HARBIN INST OF TECH
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