Influence of carbon sources on nutrient removal in A2/O-MBRs： Availability assessment of internal carbon source  

作　　者：Rongle Xu Yaobo Fan Yuansong Wei Yawei Wang Nan Luo Min Yang Xing Yuan Rong Yu 

机构地区：[1]Scientific Research Academy of Guangxi Environmental Protection, Jiaoyu Road 5, QingXiu Distr., Nanning 530022, China. [2]Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian Distr., Beijing 100085, China

出　　处：《Journal of Environmental Sciences》2016年第10期59-68,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 51278483);the National Major Science & Technology Projects for Water Pollution Control and Management (No. 2012ZX07202-005);the project of Watershed Ecosystem Health Assessment of Guangxi

摘　　要：Both intemal carbon source and some external carbon sources were used to improve the nutrient removal in Anaerobic-Anoxic-Oxic-Membrane Bioreactor （A2/O-MBRs）, and their technical and cost analysis was investigated. The experimental results showed that the nutrient removals were improved by all the carbon source additions. The total nitrogen and phosphorus removal efficiency were higher in the experiments with external carbon source additions than that with internal carbon source addition. It was found that pathways of nitrogen and phosphorus transform were different dependent on different carbon source additions by the mass balance analysis. With extemal carbon source addition, the simultaneous nitrification and denitrification occurred in aerobic zone, and the P-uptake in aerobic phase was evident. Therefore, with addition of C-MHP （internal carbon source produced from sludge pretreatment by microwave-H2O2 process）, the denitrification and phosphorus-uptake in anoxic zone was notable. Cost analysis showed that the unit nitrogen removal costs were 57.13 CNY/kg N of C-acetate addition and 54.48 CNY/kgN of C-MHP addition, respectively. The results indicated that the C-MHP has a good technical and economic feasibility to substitute extemal carbon sources partially for nutrient removal.Both intemal carbon source and some external carbon sources were used to improve the nutrient removal in Anaerobic-Anoxic-Oxic-Membrane Bioreactor （A2/O-MBRs）, and their technical and cost analysis was investigated. The experimental results showed that the nutrient removals were improved by all the carbon source additions. The total nitrogen and phosphorus removal efficiency were higher in the experiments with external carbon source additions than that with internal carbon source addition. It was found that pathways of nitrogen and phosphorus transform were different dependent on different carbon source additions by the mass balance analysis. With extemal carbon source addition, the simultaneous nitrification and denitrification occurred in aerobic zone, and the P-uptake in aerobic phase was evident. Therefore, with addition of C-MHP （internal carbon source produced from sludge pretreatment by microwave-H2O2 process）, the denitrification and phosphorus-uptake in anoxic zone was notable. Cost analysis showed that the unit nitrogen removal costs were 57.13 CNY/kg N of C-acetate addition and 54.48 CNY/kgN of C-MHP addition, respectively. The results indicated that the C-MHP has a good technical and economic feasibility to substitute extemal carbon sources partially for nutrient removal.

关 键 词：Carbon sourceNutrient removalMass balanceCost analysis 

分 类 号：X703[环境科学与工程—环境工程]