Method for treating paper-making wastewater by utilizing photocatalytic oxidation film coagulation reactor

A technology for photocatalytic oxidation and papermaking wastewater, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, energy wastewater treatment, etc. Low cost, low investment and small footprint

Inactive Publication Date: 2012-07-04
厦门凯瑞尔数字环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional alkali recovery technology, biochemical technology, etc. have the characteristics of large investment scale, high operating cost, and high technical content, and can only be used in some large paper mills, but are not applicable to most small and medium paper mills

Method used

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  • Method for treating paper-making wastewater by utilizing photocatalytic oxidation film coagulation reactor
  • Method for treating paper-making wastewater by utilizing photocatalytic oxidation film coagulation reactor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the water quality of papermaking wastewater is as follows: SS concentration is 256mg / L, COD concentration is 1378mg / L, BOD 5 The pH value is 326mg / L, the pH value is 3.0, the hydraulic retention time of the photocatalytic oxidation reactor is 2h, the hydraulic retention time of the membrane coagulation reactor is 3h, and the KRT-3 water treatment agent is added at a concentration of 8mg / L. Days later, the average value of effluent water quality is: SS concentration is 36mg / L, COD concentration is 88mg / L, BOD 5 It is 37mg / L, and the pH value is 7.1.

Embodiment 2

[0030] Embodiment 2: the water quality of papermaking wastewater is as follows: SS concentration is 423mg / L, COD concentration is 2120mg / L, BOD 5 The pH value is 435mg / L, the pH value is 3.8, the hydraulic retention time of the photocatalytic oxidation reactor is 2h, the hydraulic retention time of the membrane coagulation reactor is 3h, and the KRT-3 water treatment agent is added at a concentration of 15mg / L. Days later, the average value of effluent water quality is: SS concentration is 49mg / L, COD concentration is 102mg / L, BOD 5 It is 78mg / L, and the pH value is 7.4.

Embodiment 3

[0031] Embodiment 3: the water quality of papermaking wastewater is as follows: SS concentration is 510mg / L, COD concentration is 2570mg / L, BOD 5 The pH value is 513mg / L, the pH value is 4.1, the hydraulic retention time of the photocatalytic oxidation reactor is 2h, the hydraulic retention time of the membrane coagulation reactor is 3h, and the KRT-3 water treatment agent is added at a concentration of 18mg / L. Days later, the average value of effluent water quality is: SS concentration is 112mg / L, COD concentration is 126mg / L, BOD 5 It is 89mg / L, and the pH value is 7.8.

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Abstract

The invention provides a method for treating paper-making wastewater by utilizing a photocatalytic oxidation film coagulation reactor, which relates to a wastewater treating method, and provides a method for treating paper-making wastewater by utilizing a photocatalytic oxidation film coagulation reactor and a device thereof. The device is provided with a photocatalytic oxidation reactor and a film coagulation reactor; and the water outlet end of the photocatalytic oxidation reactor is communicated with the water inlet end of the film coagulation reactor. The paper-making wastewater is conveyed into the water inlet end of the oxidation reactor of the photocatalytic oxidation film coagulation reactor wastewater treating device by a water inlet system, and the water outlet end of the photocatalytic oxidation reactor is communicated with the water inlet end of the film coagulation reactor; after a water inlet pump of the water inlet end of the photocatalytic oxidation reactor is started, the photocatalytic oxidation reactor is started; a water treatment agent is thrown into a chemical reactor of the film coagulation reactor, an air pump is started for aeration so as to form suspended solids in the paper-making wastewater to form floc under the function of the water treatment agent, and then the floc is removed; and the normal working state of the photocatalytic oxidation film coagulation reactor wastewater treating device is maintained.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a method for treating papermaking wastewater by using a photocatalytic oxidation film coagulation reactor. Background technique [0002] Environmental pollution caused by papermaking wastewater has become increasingly prominent (Shi Yingqiao, Ding Laibao, Li Ping, etc. Advanced Treatment Research and Engineering Application of Papermaking Wastewater [J]. Jiangsu Papermaking, 2005, (4): 40-45). Conventional alkali recovery technology and biochemical technology have the characteristics of large investment scale, high operating cost and high technical content, and can only be used in some large paper mills, but are not applicable to most small and medium paper mills. Therefore, finding a papermaking wastewater treatment technology that is more suitable for China's national conditions has always been a key research topic of various research institutions in my country (Li Ying, Zhang A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/52C02F103/28
CPCY02W10/37
Inventor 孔健林雪
Owner 厦门凯瑞尔数字环保科技有限公司
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