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Treatment method of waste papermaking water

A treatment method and technology for papermaking wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. , secondary pollution and other problems, to achieve good adsorption and filtration, improve reaction efficiency, and reduce drug consumption.

Active Publication Date: 2010-07-21
SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to cost reasons and technical reasons, that is, the composition of wastewater in the middle stage of papermaking is complex and changeable, which not only brings high cost problems to ultrafiltration membrane technology and reverse osmosis membrane technology in the treatment of papermaking wastewater, but also makes the processing technology unexpected troubles
Therefore, solving the problems of high cost, complicated treatment methods and serious secondary pollution in the existing technology is the top priority in the treatment of papermaking wastewater. Whether the papermaking wastewater treatment can be successfully completed determines the survival and development of papermaking enterprises.

Method used

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  • Treatment method of waste papermaking water
  • Treatment method of waste papermaking water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0176] From July 15th to 22nd, 2008, due to the change of the pulping process, the COD of the raw water in the middle section was 5300mg / L, and the UPCB effluent was 2530mg / L after being treated by the system, A 1 Effluent 1550mg / L, A 2 The effluent water is 900, and the effluent water of the secondary sedimentation tank is 80-105mg / L, SS<50mg / L.

Embodiment 2

[0178] From October 3rd to 10th, 2008, the COD of the raw water in the middle section was 3500mg / L, and the output water was 1800mg / L after being treated by the system, A 1 Effluent 1150mg / L, A 2 Effluent 705 Secondary sedimentation tank effluent 70-55mg / L, SS<50mg / L.

Embodiment 3

[0180] From July 10 to November 10, 2008, the average water level in the middle section was COD3800mg / L, and the average output level of UPCB after treatment by this system was 1900mg / L, A 1 Effluent 1280mg / L, A 2 Effluent 730 Secondary sedimentation tank effluent 85mg / L, SS<50mg / L.

[0181]

[0182] Effluent 1150mg / L, A 2 Effluent 705 Secondary sedimentation tank effluent 70-55mg / L, SS<50mg / L.

[0183] Example 3

[0184] From July 10 to November 10, 2008, the average water level in the middle section was COD3800mg / L, and the average output level of UPCB after treatment by this system was 1900mg / L, A 1 Effluent 1280mg / L, A 2 Effluent 730 Secondary sedimentation tank effluent 85mg / L, SS<50mg / L.

[0185]

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PUM

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Abstract

The invention relates to a treatment method of waste papermaking water, which comprises the steps of filtration, sand setting, flocculation and sedimentation and separation and reuse. The invention is characterized in that before adding flocculating agents into reclaimed water to be treated for flocculation and sedimentation, the flocculating agents which account for 70 to 90 weight percent of the total consumption carry out desalted treatment. When the method of the invention is adopted, the waste papermaking water with high salt content can be treated at the low cost, and in addition, satisfactory results can be obtained.

Description

technical field [0001] The invention relates to a method for treating papermaking wastewater, in particular to a method for purifying wastewater in the middle stage of papermaking. Background technique [0002] The entire production process of the pulp and paper industry requires a large amount of water, which collects a large amount of industrial harmful substances during the production process, which cannot be directly used, and will pollute the environment if it is directly discharged. The recycling and reuse of wastewater has significant economic and social value and determines the survival and development of papermaking enterprises. [0003] In the paper industry, chemical precipitation, air flotation treatment, and biological oxidation are usually used to treat reclaimed water. [0004] At present, the traditional primary treatment process for environmental protection of papermaking is primary sedimentation or physical and chemical flocculation sedimentation. The floc...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F11/12
Inventor 贾明昊曹光春李晓光丁志刚宋学恒张卫勇程磊磊李洪法宋明信杨吉慧
Owner SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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