| Identical full-scale biogas-lift reactors (BLRs) with anaerobic granular sludge and residual activated sludge for brewery wastewater treatment and kinetic modeling |
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| 作者姓名： | Fu Xu Zhenxing Huang Hengfeng Miao Hongyan Ren Mingxing Zhao Wenquan Ruan |
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| 作者单位： | School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China (No. NSFC20976069), the Fundamental Research Funds for the Central Universities, China (No. JUSRP111A12), the Higher School Science and Technology Innovation Project of Cultivating the Capital Project, China (No. 708048), and the Self-determined Research Program of Jiangnan University (No. JUSRP11006). The authors would like to thank the editor and the anonymous reviewers for their editing and review. |
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| 摘 要： | Two identical full-scale biogas-lift reactors treating brewery wastewater were inoculated with different types of sludge to compare their operational conditions, sludge characteristics, and kinetic models at a mesophilic temperature. One reactor （R1） started up with anaerobic granular sludge in 12 weeks and obtained a continuously average organic loading rate （OLR） of 7.4 kg chemical oxygen demand （COD）/（m3.day）, COD removal efficiency of 80%, and effluent COD of 450 mg/L. The other reactor （R2） started up with residual activated sludge in 30 weeks and granulation accomplished when the reactor reached an average OLR of 8.3 kg COD/（m^3·day）, COD removal efficiency of 90%, and effluent COD of 240 mg/L. Differences in sludge characteristics,biogas compositions, and biogas- lift processes may be accounted for the superior efficiency of the treatment performance of R2 over R1. Grau second-order and modified StoverKincannon models based on influent and effluent concentrations as well as hydraulic retention time were successfully used to develop kinetic parameters of the experimental data with high correlation coefficients （R2 〉 0.95）, which further showed that R2 had higher treatment performance than R1. These results demonstrated that residual activated sludge could be used effectively instead of anaerobic granular sludge despite the need for a longer time.
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| 关 键 词： | 活性污泥处理 厌氧颗粒污泥 剩余活性污泥 啤酒废水 动力学模拟 沼气 升降 COD去除率 |
| 收稿时间： | 15 December 2012 |
| 修稿时间： | 17 April 2013 |
Identical full-scale biogas-lift reactors (BLRs) with anaerobic granular sludge and residual activated sludge for brewery wastewater treatment and kinetic modeling |
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| Fu Xu,Zhenxing Huang,Hengfeng Miao,Hongyan Ren,Mingxing Zhao,Wenquan Ruan.Identical full-scale biogas-lift reactors (BLRs) with anaerobic granular sludge and residual activated sludge for brewery wastewater treatment and kinetic modeling[J].Journal of Environmental Sciences,2013,25(10):2031-2040. |
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| Authors: | Fu Xu Zhenxing Huang Hengfeng Miao Hongyan Ren Mingxing Zhao and Wenquan Ruan |
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| Institution: | School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China |
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| Abstract: | Two identical full-scale biogas-lift reactors treating brewery wastewater were inoculated with different types of sludge to compare their operational conditions, sludge characteristics, and kinetic models at a mesophilic temperature. One reactor (R1) started up with anaerobic granular sludge in 12 weeks and obtained a continuously average organic loading rate (OLR) of 7.4 kg chemical oxygen demand (COD)/(m3·day), COD removal efficiency of 80%, and effluent COD of 450 mg/L. The other reactor (R2) started up with residual activated sludge in 30 weeks and granulation accomplished when the reactor reached an average OLR of 8.3 kg COD/(m3·day), COD removal efficiency of 90%, and effluent COD of 240 mg/L. Differences in sludge characteristics, biogas compositions, and biogas-lift processes may be accounted for the superior efficiency of the treatment performance of R2 over R1. Grau second-order and modified StoverKincannon models based on influent and effluent concentrations as well as hydraulic retention time were successfully used to develop kinetic parameters of the experimental data with high correlation coefficients (R2 > 0.95), which further showed that R2 had higher treatment performance than R1. These results demonstrated that residual activated sludge could be used effectively instead of anaerobic granular sludge despite the need for a longer time. |
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| Keywords: | anaerobic granular sludge residual activated sludge biogas-lift reactor brewery wastewater kinetic modeling |
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