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Analysis of Equal-standard Pollution Load of Wastewater Pollution Sources in the Whole Process of Chemi-mechanical Pulping
Received:July 18, 2022  
DOI：DOI：10.11980/j.issn.0254-508X.2023.03.001
Key Words:equal-standard pollution load method  pulp and paper  chemi-mechanical pulping  pulping wastewater  analysis of pollution sources
Fund Project:北京市自然科学基金（项目编号：2234090）。
Author NameAffiliationPostcode
CAI Hui* China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 100102
ZHU Wenyuan Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 210037
WANG Shumei Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 210037
XU Jun State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
CAO Chunyu China Technical Association of Paper Industry， Beijing， 100102 100102
LIU Junjie China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 100102
TIAN Chao China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 100102
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Abstract:The equal-standard pollution load method was used to quantitatively analyze the amount of wastewater and the types， concentrations， and existing status of the main characteristic water pollutants in each process of the chemi-mechanical pulping. The results showed that the main water pollutants in the material preparation process were COD， suspended solids （SS） and BOD； the main water pollutants in the wood chip washing， extrusion and tearing， screw pressing， screening purification and concentration processes were BOD， COD and SS； the main pollution sources were concentrated in screening， purification， concentration and screw pressing， among them， the equal-standard pollution load ratio of the screening， purification and concentration process was 50.12%~51.17%， and the screw pressing process was 43.40%~44.21%， hence， the cumulative pollution load ratio of these two processes reached more than 90%； the main water pollutants in the whole processes were BOD， COD， and SS， and the cumulative load ratio had reached more than 80%， which was the focus of sewage treatment. The results of this study could provide an effective basis for environmental impact degree evaluation and management control of water pollutants in typical chemi-mechanical pulping process.
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