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Coal gasification waste water biochemical treatment equipment and method

A technology for coal gasification wastewater and biochemical treatment, applied in chemical instruments and methods, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problems of low COD removal rate, ammonia nitrogen removal rate, high investment and operating costs, ammonia nitrogen Adapt to problems such as small scope, to achieve the effect of inhibiting membrane pollution, low sludge load, and good water quality

Active Publication Date: 2011-09-07
ENN ENVIROTECH CO LTD
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  • Application Information

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Problems solved by technology

The main problems of the existing technology are: high requirements for raw water pretreatment, often need to dilute the raw water, low COD load and ammonia nitrogen load, long residence time, insufficient treatment depth, low COD removal rate and ammonia nitrogen removal rate, low investment And high operating costs, small adaptability to ammonia nitrogen, insufficient impact capacity, unstable system operation, and high alkalinity consumption for high ammonia nitrogen wastewater

Method used

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  • Coal gasification waste water biochemical treatment equipment and method
  • Coal gasification waste water biochemical treatment equipment and method
  • Coal gasification waste water biochemical treatment equipment and method

Examples

Experimental program
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Effect test

Embodiment 1

[0083]An actual coal gasification wastewater influent COD: 8600mg / l; influent ammonia nitrogen: 893.41mg / l; influent volatile phenol: 1530mg / l; The residence time of the treatment unit is 15 hours, the residence time of the anoxic biochemical treatment unit is 12 hours, the residence time of the primary aerobic biochemical treatment unit is 20 hours, the residence time of the secondary aerobic biochemical treatment unit is 20 hours, and the residence time of the membrane bioreaction unit is 13 hours), The average concentration of activated sludge is: 6000mg / l, the air-water ratio is 100, the pH value has been maintained between 7.2 and 7.7, and the wastewater treatment effect shown in Table 1 has been obtained under the condition of above 20°C.

[0084] Table 1

[0085]

water quality index

raw water

Anaerobic

processing

unit out

water

hypoxic biochemical

processing unit

out ...

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Abstract

The invention provides coal gasification waste water biochemical treatment equipment and a method. The equipment comprises an anaerobic biochemical treatment unit, an anoxic biochemical treatment unit, a one-grade or multiple-grade aerobic biochemical treatment unit and a membrane biological response unit which are communicated in sequence. In addition, the aerobic biochemical treatment unit is also communicated with the anoxic biochemical treatment unit, and the membrane biological response unit is communicated with the anoxic biochemical treatment unit; each biochemical treatment unit has the characteristics of biochemistry and slurry and water separation integration. The coal gasification waste water biochemical treatment equipment and the method have high COD load and high ammonia nitrogen load and can realize high COD removal rate and high ammonia nitrogen removal rate.

Description

technical field [0001] The invention relates to a biochemical treatment device and method for coal gasification wastewater. Background technique [0002] Coal gasification wastewater (including coking wastewater) is a kind of refractory organic wastewater with high COD (chemical oxygen demand) and high ammonia nitrogen. At present, the treatment technology of coal gasification wastewater generally consists of three parts: pretreatment, biochemical treatment and advanced treatment. Biochemical treatment is the main treatment method for removing COD and ammonia nitrogen pollutants from coal gasification wastewater. The biochemical treatment methods used in the treatment of coal gasification wastewater are mainly A / O process (anoxic / aerobic process) and A 2 / O (anaerobic anoxic / aerobic process) process, SBR process is also applied. The main problems of the existing technology are: high requirements for raw water pretreatment, often need to dilute the raw water, low COD load ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/44C02F3/34C02F3/30
Inventor 于振生李超伟张宝库雷金环李立敏
Owner ENN ENVIROTECH CO LTD
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