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Composite anaerobic-aerobic process for treating waste paper making wastewater

A waste paper papermaking and composite anaerobic technology, applied in the direction of aerobic and anaerobic process treatment, paper making, paper machine, etc., can solve the problems of affecting promotion, difficult management, unstable operation, etc., to improve the overall effect and operation management Convenience and reduce the effect of filter material balling

Active Publication Date: 2011-10-05
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

IC reactors are mostly used in high-concentration organic wastewater such as citric acid in China, but there are problems such as unstable operation and difficult management during operation, which affect its promotion

Method used

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  • Composite anaerobic-aerobic process for treating waste paper making wastewater
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  • Composite anaerobic-aerobic process for treating waste paper making wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0019] COD cr The waste paper and papermaking wastewater with an average of 800mg / L first enters the physical and chemical treatment unit, and the coarse fiber in the waste paper and papermaking wastewater is intercepted by the blocking effect of the mesh holes of the inclined screen, and the fibers are recycled; the effluent of the physical and chemical treatment unit passes through the composite The abundant pipe water distributor at the bottom of the anaerobic tank distributes water, and forms a granular anaerobic sludge layer in the activated sludge layer. The average particle size of the anaerobic sludge is 1.0 mm, and the pH value is 6.5. The hydraulic retention time of the sludge layer is 1.0 hours; through the upper anaerobic filter layer, the microorganisms attached to the surface of the filter material and the inside of the pores are used for catabolism. The filter material is a highly elastic porous polyurethane filler, and its components are: poly 50 parts by weigh...

Embodiment 2

[0021] COD cr The waste paper and papermaking wastewater with an average of 4200mg / L first enters the physical and chemical treatment unit, and the coarse fiber in the waste paper and papermaking wastewater is intercepted by the blocking effect of the mesh holes of the inclined screen, and the fibers are recycled; the effluent of the physical and chemical treatment unit passes through the composite The abundant pipe water distributor at the bottom of the anaerobic tank distributes water, and forms a granular anaerobic sludge layer in the activated sludge layer. The average particle size of the anaerobic sludge is 3.0 mm, and the pH value is 6.5. The hydraulic retention time of the sludge layer is 3.5 hours; through the upper anaerobic filter layer, the microorganisms attached to the surface of the filter material and the inside of the pores are used to decompose and metabolize. The filter material is a highly elastic porous polyurethane filler, and its components are: polymer ...

Embodiment 3

[0023] COD cr The waste paper and papermaking wastewater with an average of 2540mg / L first enters the physical and chemical treatment unit, and the coarse fiber in the waste paper and papermaking wastewater is intercepted by the blocking effect of the mesh holes of the inclined screen, and the fibers are recycled; the effluent of the physical and chemical treatment unit passes through the composite The water distribution device at the bottom of the anaerobic tank distributes water and forms a granular anaerobic sludge layer in the activated sludge layer. The average particle size of the anaerobic sludge is 2.9mm and the pH value is 7.2. The hydraulic retention time of the sludge layer is 2.35 hours; through the upper anaerobic filter layer, the microorganisms attached to the surface of the filter material and the inside of the pores are used to decompose and metabolize. The filter material is a highly elastic porous polyurethane filler, and its components are: polymer 90 parts...

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Abstract

The invention discloses a composite anaerobic-aerobic process for treating waste paper making wastewater. The method comprises that: the waste paper making wastewater enters a physicochemical treatment unit, and fibers are recycled; and the water yielded from the physicochemical treatment unit is distributed through an air pipe water distributor at the bottom of a composite anaerobic pool, pollutants are removed by anaerobic granular sludge formed by an active sludge layer at the lower part of the composite anaerobic pool, then the wastewater enters an anaerobic filter layer at the upper partof the composite anaerobic pool and is subjected to decomposition and metabolism by using microbes attached and grown on the surface of a filter material and inside pores, the top of the composite anaerobic pool yields water to an aerobic pool, the water yielded from the aerobic pool enters a sedimentation pool, the sludge and the water are separated, and the supernatant fluid water can be directly discharged and also can be recycled for paper making. By using the anaerobic granular sludge to adsorb small fibers, the method reduces balling of the filter material of the anaerobic filter pool, improves the integral effect of anaerobic treatment, and achieves the aims of steady operation of sewage treatment facilities and reduction of operating cost of sewage treatment.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a process for composite anaerobic and aerobic treatment of waste paper and papermaking wastewater. Background technique [0002] Anaerobic wastewater treatment technology is playing an increasingly important role in wastewater treatment due to its advantages of low operating cost, energy saving, less residual sludge, and easy sludge disposal. At present, the main application fields of anaerobic treatment technology in foreign paper industry include waste paper pulping and papermaking wastewater, mechanical pulp and chemical mechanical pulp wastewater, etc. However, the domestic paper industry seldom adopts anaerobic technology, which has great room for development in the paper industry. [0003] After more than a hundred years of development, the anaerobic process has developed from the initial first-generation anaerobic digester to the second-generation anaerobic filter (AF), an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14D21F1/66C02F3/30C02F103/28
Inventor 徐灏龙仝武刚
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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