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Application of Equal-standard Pollution Load Method in the Analysis of Wastewater Pollution Sources in the Whole Process of Chemical Pulping
Received:March 18, 2021  
DOI：10.11980/j.issn.0254-508X.2021.07.014
Key Words:equal-standard pollution load method  pulp and paper  chemical pulping  analysis of pollution sources  water pollutants control
Fund Project:国家科技重大专项“重点行业水污染全过程控制技术集成与工程实证”（2017ZX07402004）。
Author NameAffiliationPostcode
CAI Hui Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037
Sinolight Paper Inspection & Certification 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
WANG Liyong Asia Symbol （Shandong） Pulp and Paper Co.， Ltd.， Rizhao， Shandong Province， 276800 276800
DONG Yuanfeng Hainan Jinhai Pulp & Paper Co.， Ltd.， Yangpu， Hainan Province， 578101 578101
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Abstract:By determining the amount of wastewater， the types and concentrations of characteristic pollutants， and the state of existence in each process of the chemical pulping process， the equal-standard pollution load method was used to quantitatively analyze the standard pollution load and load ratio of each process and each characteristic pollutant. The results showed that the main pollutants in the preparation process were BOD， COD and suspended solids； the main pollutants in the cooking process were BOD and COD； the main pollutants in the washing， screening and purification process were BOD and COD； the main pollutants in the CEH bleaching process were dioxins； the main pollutants in the ECF bleaching process were BOD， COD and suspended solids； the main pollutants in the TCF bleaching process were BOD and COD； the main polluting processes were cooking and bleaching， and the cumulative equivalent pollution load ratio of these two processes reached more than 90%. The research results could provide a scientific and reliable basis for the whole process control of water pollution in chemical pulping in the paper industry.
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