SHUBin,LIZhi-Gang,WANGHai,et al.Factors Influencing the Performance of Thermophilic Bacteria and Coagulation Combined System in Treating High-temperature Pulping Wastewater[J].China Water & Wastewater,2024,40(17):92-97.
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Factors Influencing the Performance of Thermophilic Bacteria and Coagulation Combined System in Treating High-temperature Pulping Wastewater

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第17期 Page: 92-97 Column: Date of publication: 2024-09-01
Author(s):
SHU　Bin1;  LI　Zhi-Gang2;  WANG　Hai3;  SHI　Shuo-hui3;  KUANG　Fa-guo3;  ZHOU　Jiong3;  ZHOU　Jian3
（1. Chongqing Design Group Co. Ltd. Municipal Design Institute， Chongqing 400020， China； 2. Southwest Municipal Engineering Design & Research Institute of China， Chengdu 610299， China； 3. Key Laboratory of Three Gorges Reservoir Region’s Eco?Environment ， Chongqing University， Chongqing 400045， China）
Keywords:
pulping wastewater;  high temperature;  thermophilic bacteria;  coagulation;  influence factor
Abstract:
A thermophilic bacteria biofilm treatment system was established for treating high-temperature pulping wastewater. The influences of organic load, DO and pH on the treatment efficiency of the thermophilic bacteria biofilm system and polluants removal in the combined system of thermophilic bacteria and coagulation were explored. There was no significant disparity in the treatment efficacy between the high-temperature (50 ℃) thermophilic bacteria biofilm treatment system and the normal-temperature (30 ℃) system. However, a significant difference existed in the composition of the microbial community. The influences of organic load, DO and pH on the removal of COD in high-temperature pulping wastewater by the thermophilic bacteria system were remarkable, yet the impacts on the removal of chromaticity were insignificant. Under the conditions of temperature of 50 ℃, organic load of 0.4 kg/(m3·d), and DO of 3.0 mg/L, the removal rates of COD and chromaticity in the thermophilic bacteria biofilm system were 68.49% and 23.27%, respectively. The total removal rates of COD and chromaticity by the thermophilic bacteria and coagulation combined system were 84.98% and 85.36%, respectively. The removal rates of COD and chromaticity were 68.58% and 23.36% by the thermophilic bacteria, and 16.40% and 62.00% by the coagulation unit, respectively. Substances like melanoidin and lignocellulose that caused chromaticity in pulping wastewater were predominantly removed by the coagulation unit.
Last Update: 2024-09-01