Method for using anaerobic co-metabolism to process wastewater of coal chemical industry

A technology for coal chemical wastewater and wastewater treatment, which is applied in environmental engineering, chemical wastewater treatment, and municipal engineering fields. Improved oxygen treatment effect, shortened start-up time, and the effect of solving difficulties in anaerobic treatment

Inactive Publication Date: 2009-10-14
HARBIN INST OF TECH +1
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Problems solved by technology

[0004] In order to solve the problem that the anaerobic process is used to treat coal chemical industry wastewater, it is difficult to start and the initial anaerobic strains are difficult to adapt to the waste water, which not only results in extremely low process efficiency, but also makes it difficult to multiply the strains in the system, making it difficult to achieve efficient and stable operation. problem; and then provides a method for anaerobic co-metabolism treatment of coal chemical wastewater

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  • Method for using anaerobic co-metabolism to process wastewater of coal chemical industry
  • Method for using anaerobic co-metabolism to process wastewater of coal chemical industry
  • Method for using anaerobic co-metabolism to process wastewater of coal chemical industry

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specific Embodiment approach 1

[0014] Embodiment 1: The method for anaerobic co-metabolism treatment of coal chemical industry wastewater described in this embodiment includes the following steps:

[0015] Step 1, selecting coal chemical industry wastewater with phenols as the main pollutants, COD of 3000-4000 mg / L, and total phenol concentration of 600-800 mg / L as wastewater to be treated (raw water);

[0016] Step 2, using anaerobic granular sludge as an initial inoculation mud source, putting the initial inoculation mud source into an anaerobic reactor and settling for 12 to 24 hours; the anaerobic reactor is a medium-temperature anaerobic reactor, That is, keep the temperature in the anaerobic reactor at 32-35°C;

[0017] Step 3: Use methanol as the co-metabolism substrate, add methanol to the wastewater to be treated, and control the ratio of the total amount of COD added by methanol every day (COD equivalent of methanol) to the total amount of COD of coal chemical wastewater treated every day at 0.1~ ...

specific Embodiment approach 2

[0022] Specific embodiment two: In this embodiment, the unit phenol concentration of the coal chemical industry wastewater described in step one is 150-250 mg / L. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: present embodiment is in step two, and the inoculum amount of the initial inoculation mud source in the anaerobic reactor is controlled at more than 40gVSS / L (VSS refers to volatile suspended solids). Other steps are the same as those in Embodiment 1 or 2.

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Abstract

A method for using anaerobic co-metabolism to treat wastewater of coal chemical industry relates to a method for treating wastewater of coal chemical industry. The invention solves the problems that when anaerobic technology is adopted to treat wastewater of coal chemical industry, start is difficult, initial anaerobic culture is difficult to adapt to wastewater and high-efficiency and stable operation is difficult to realize. The method mainly comprises the following steps of: selecting the wastewater to be treated; taking anaerobic granular sludge as initial seeding sludge source; adopting methanol as co-metabolism substrate and controlling the rate of the total COD (chemical oxygen demand) content of added methanol every day and the total COD content of treated wastewater of coal chemical industry every day between 0.1-0.5; keeping HRT (hydraulic retention time) of 24h; and controlling working conditions to be stable. By using the methanol as the co-metabolism substrate in anaerobically treating the wastewater of coal chemical industry, the method leads anaerobic biochemical property of gas making wastewater to have a dramatic rise, shortens the start time of a reactor, and solves the problem of difficult anaerobic treatment of the wastewater of coal chemical industry. After stable operation, the COD removal ratio of the wastewater of coal chemical industry anaerobic treatment can reach over 50 percent and the removal ratio of total phenol can reach 70-80 percent.

Description

technical field [0001] The invention relates to a method for treating coal chemical wastewater, and belongs to the technical fields of municipal engineering, environmental engineering and chemical wastewater treatment. 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 composition of the wastewater is extremely complex, not only containing a large number of phenolic compounds, but also aliphatic compounds, heterocyclic compounds, polycyclic aromatic compounds and cyanides. Most of these components are toxic, harmful and refractory organic substances, which have strong biological toxicity and seriously threaten the safety of the environment. my country is a country rich in coal resour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 韩洪军姜殿臣高亚楼宁秋实韩雪冬金刚石曲江李生敏王伟李慧强杜彦杰
Owner HARBIN INST OF TECH
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