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Regenerated papermaking wastewater treatment system and process

A treatment process and technology for papermaking from waste paper, which is applied in the fields of wastewater treatment during processing, multi-stage water/sewage treatment, flotation water/sewage treatment, etc.

Active Publication Date: 2014-01-22
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the special nature of waste paper and papermaking wastewater, this system is not suitable for the treatment of waste paper and papermaking wastewater

Method used

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  • Regenerated papermaking wastewater treatment system and process

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Embodiment 1

[0071] The water quality of a waste paper and papermaking sewage is pH: 7~8, CODcr: 1500~2500mg / l, SS: 500~800mg / l, and the inflow is 3000m 3 / d, the sewage treatment process is adjustment - air flotation - anaerobic hydrolysis - biological selection - aerobic decomposition - secondary sedimentation tank - effluent, and the effluent after treatment is required to meet the local standard of CODcr<100mg / l. The residence time of anaerobic hydrolysis is 12 hours. A submersible mixer is installed in the area to mix the mud and water fully, and a combined filler is installed to increase the biomass. Dosing 200mg / L iron salt in the air flotation tank, the residence time of the anaerobic treatment unit is 12 hours, the residence time of the biological selection unit is 1h, the residence time of the first aerobic treatment unit is 12 hours, and the residence time of the second aerobic treatment unit is 12 hours. for 8h. Activated sludge method, blast aeration, variable hole aeration h...

Embodiment 2

[0073] The wastewater in an industrial park is mainly waste paper and papermaking wastewater, the wastewater quality is pH6.5-8.5, CODcr:200-400mg / l, NH 3 -N: 5-10mg / l, TP0.5-1mg / l, SS: 150~300mg / l, water temperature is normal temperature, water volume is 40000m 3 / d, the sewage treatment process is: grille - sand settling - anaerobic hydrolysis - biological selection - aerobic decomposition - SBR - micro-flocculation sand filtration - ultraviolet disinfection - effluent, the effluent is required to meet the "urban sewage treatment plant pollution Class I B standard in GB18918-2002 emission standard. A submersible mixer is installed in the hydrolysis zone to mix the mud and water fully; the activated sludge method is adopted, the blast aeration is adopted, the residence time of the anaerobic treatment unit is 12 hours, the residence time of the biological selection unit is 1h, and the residence time of the first aerobic treatment unit is 8 hours, the residence time of the sec...

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Abstract

The invention discloses a regenerated papermaking wastewater treatment system and a process. The treatment system comprises a physiochemical treatment unit, an anaerobic treatment unit, a biological selection unit, a first aerobic treatment unit, a second aerobic treatment and a sedimentation unit, which are communicated in sequence, wherein the physiochemical treatment unit is provided with a coagulant adding device; the first aerobic treatment unit is provided with a microorganism microbial inoculum adding device; the second aerobic treatment unit is provided with a metazoan culture adding groove; aeration pipe nets which are communicated with air blowing equipment are arranged at the bottoms of the first aerobic treatment unit and the second aerobic treatment unit; and the sedimentation unit is provided with a sewage reflowing pipeline which is communicated with the anaerobic treatment unit and the biological selection unit. The treatment system disclosed by the invention is suitable for the treatment of papermaking wastewater and realizes the low sewage yield of the regenerated papermaking wastewater treatment.

Description

technical field [0001] The invention relates to the technical fields of biological engineering and environmental engineering, in particular to a waste paper and papermaking wastewater treatment system and process. Background technique [0002] The papermaking industry is one of the industries with high energy consumption and material consumption and serious environmental pollution. Its pollution characteristics are large wastewater discharge, including high COD and suspended solids (SS) content, and serious chroma. [0003] The concentration of SS and COD in waste paper and papermaking wastewater is relatively high, and COD is composed of insoluble COD and soluble COD. Usually, insoluble COD accounts for the majority of the total COD composition. When SS is removed from wastewater, absolutely Most of the insoluble COD is removed at the same time. Therefore, the main problem to be solved in waste paper and papermaking wastewater treatment is to remove SS and COD. The ratio ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/52C02F1/24C02F103/28
Inventor 梅荣武韦彦斐喻治平李明智沈浙萍张刚王慧荣李欲如许青兰
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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