WANGYa-jun,XUYan-chao,ZHANGSi-yong,et al.Membrane Bioreactor Operation Regulation Based on Aeration and Powdered Activated Carbon Coupling[J].China Water & Wastewater,2024,40(17):71-78.
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Membrane Bioreactor Operation Regulation Based on Aeration and Powdered Activated Carbon Coupling

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第17期 Page: 71-78 Column: Date of publication: 2024-09-01
Author(s):
WANG　Ya-jun1; 2;  XU　Yan-chao1;  ZHANG　Si-yong1;  YAN　Yuan1
（1. School of Civil Engineering， Lanzhou University of Technology， Lanzhou 730050， China； 2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering ， Lanzhou University of Technology， Lanzhou 730050， China）
Keywords:
membrane bioreactor;  air to water ratio;  powdered activated carbon;  sewage treatment;  membrane fouling
Abstract:
To address the issues of unstable treatment performance and high operating cost associated with membrane bioreactor (MBR), the coupling effect of aeration and powdered activated carbon (PAC) was optimized to regulate the operation of MBR. The treatment performance, characteristics of sludge mixture and membrane fouling of MBR under various gas to water ratios and PAC dosages were investigated through the construction of 6 working conditions. When the gas to water ratio was 65∶1 and the dosage of PAC was 1 g/L, the operational efficiency of MBR reached its optimum, and the average removal rates of COD, TN, NH4+-N and TP were 95.81%, 43.22%, 85.17% and 31.64%, respectively. Additionally, the growth rate of TMP was relatively low, approximately 2.692 kPa/d. When the gas to water ratio was 65∶1 and the dosage of PAC was 2 g/L, the average removal rates of COD, TN, NH4+-N and TP were respectively increased by 2%, 26%, 8% and 42% on the basis of the previous one, and the growth rate of TMP was enhanced to 6.425 kPa/d. At this point, although the treatment performance was superior, the operation cost was higher and the membrane filtration cycle was shorter. Therefore, in the practical application of PAC-MBR, it is essential to balance the expected treatment performance and operation cost prior to setting the operation parameters of MBR. The application of this control strategy enables the flexible adjustment of PAC-MBR to align with the development trend of pollution reduction and carbon reduction.
Last Update: 2024-09-01