Influence of carbon sources on nutrient removal in A~2/O-MBRs:Availability assessment of internal carbon source

被引:5
|
作者
Rongle Xu [1 ]
Yaobo Fan [2 ]
Yuansong Wei [2 ]
Yawei Wang [2 ]
Nan Luo [2 ]
Min Yang [2 ]
Xing Yuan [2 ]
Rong Yu [1 ]
机构
[1] Scientific Research Academy of Guangxi Environmental Protection
[2] Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences
基金
中国国家自然科学基金;
关键词
Carbon source; Nutrient removal; Mass balance; Cost analysis;
D O I
暂无
中图分类号
X703 [废水的处理与利用];
学科分类号
083002 ;
摘要
Both internal carbon source and some external carbon sources were used to improve the nutrient removal in Anaerobic-Anoxic-Oxic-Membrane Bioreactor(A~2/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 external 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-HOprocess), the denitrification and phosphorus-uptake in anoxic zone was notable. Cost analysis showed that the unit nitrogen removal costs were 57.13 CNY/kgN 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 external carbon sources partially for nutrient removal.
引用
收藏
页码:59 / 68
页数:10
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