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Standard quality process method for synthetic wastewater of industrial park

A technology for comprehensive wastewater and industrial parks, which is applied in biological water/sewage treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc., and can solve the problems of comprehensive wastewater with extensive sources, difficult treatment, and complex components

Inactive Publication Date: 2008-09-24
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems that the comprehensive wastewater in industrial parks has a wide range of sources and complex components, and the existing technical means are difficult to deal with, the present invention provides a method for the comprehensive wastewater treatment in industrial parks up to the standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The COD of the comprehensive wastewater in the industrial park is 800mg / L, and the treatment flow rate of 10L / h is used for a small test. First, adjust the water quality and quantity through homogeneous treatment, use dilute sulfuric acid or dilute lye to adjust the pH value to 3-5, biochemical oxygen demand / chemical oxygen demand reaches 0.1, and add H 2 o 2 / Fe(II),H 2 o 2 The weight percentage concentration is 30%, the Fe(II) concentration is 100 mg / L, aeration and mixing are carried out, and the oxidation reaction is about 30 minutes, and the batch operation is performed. The dosage of each batch is 25mL. Oxidation pretreatment effluent is adjusted to neutral pH with dilute alkaline solution. After static precipitation, the COD of the supernatant is 650mg / L, and the biodegradability can be increased to above 0.3, and then pumped into the biochemical treatment system.

[0020] Coal-based powdered activated carbon with a mesh number of about 200 mesh is added to t...

Embodiment 2

[0024] The polyaluminum chloride ferric used in Example 1 was replaced with polyaluminum chloride, the concentration of polyaluminum chloride was about 20%, and the dosage of each batch was 8mL. Do not add polyacrylamide. A treatment effect close to that of Example 1 can be obtained. After continuous operation for more than 5 days, the final COD of industrial park comprehensive wastewater after treatment is stable between 90-100mg / L, and the removal rate is stable above 85%.

Embodiment 3

[0026] The COD of the comprehensive wastewater in the industrial park is 1500mg / L, and the treatment flow rate of 10L / h is used for a small test. Dosing the medicament in Example 1 and keeping the dosing concentration constant, the reaction time and conditions unchanged, but the dosing amount was all increased by 80%. After continuous operation for more than 5 days, the final COD of industrial park comprehensive wastewater after treatment is stable between 90-100mg / L, and the removal rate is stable above 90%.

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Abstract

The invention discloses a mark reaching treatment method of packaged wastewater in an industrial park. Aiming at the characteristics that the source of the packaged wastewater in the industrial part is wide, the components are complex, and the mark reaching treatment is not reliable by adopting the general biochemistry technology, firstly, the packaged wastewater in the industrial park is adjusted the pH value by mixing isotrope, and the impact load of the water quality and quantity is reduced; secondly, the biochemical property can be improved through the oxidation pretreatment, the removal rate of the organic matter is about 10-40 percent, the COD is reduced to 400-1000 mg / L, the biochemical property (B / C) can be improved by more than 0.3; thirdly, 0.01-0.1 percent of active carbon is added into a polytype main biochemical treatment system of activated sludge and biomembrane to form a PACT system, the removal rate of the organic matter is about 70-90 percent, the COD can be reduced to 120-150 mg / L; fourthly, suspended organic matter and inorganic matter are removed by coagulating sedimentation, the removal rate of the organic matter is about 10-30 percent, the COD can be stabilized under 100 mg / L, and the requirement (the COD is less than 100 mg / L) of the sewage complex discharge national standard (GB 8978-1996) is achieved.

Description

technical field [0001] The invention relates to a method for standard-reaching treatment of industrial park comprehensive wastewater mainly including organic pollutants and raw materials, intermediates or products of different concentrations and types. Background technique [0002] Comprehensive wastewater in industrial parks has a wide range of sources and complex components. The main organic pollutants include raw materials, intermediates or products of different concentrations and types, and its COD is about 500-1500mg / L. Degradation is difficult to control, and it has always been a problem in environmental protection technology. Domestic conventional biochemical treatment technology is usually used for treatment. This technology has poor impact load resistance and poor removal capacity for refractory organic matter, and generally cannot operate stably. After the industrial park comprehensive wastewater is treated by conventional biochemical technology, the appearance is...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/66C02F1/72C02F3/12C02F1/52
CPCY02W10/10
Inventor 刘福强李爱民喻学敏孙越杨尧范俊龙超朱健赵卫伟祁学华张波闫蕾凌盼盼
Owner NANJING UNIV
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