Anaerobic treatment of saline wastewater by Halanaerobium lacusrosei |
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| Institution: | 1. School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China;2. Changzhou Institute of Engineering Technology, Changzhou 213164, China;3. Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi 214122, China;1. Biomass Energy and Environmental Engineering Research Center, Beijing University of Chemical Technology, Beijing, 100029, China;2. Department of Biological & Agricultural Engineering, University of California, Davis, CA, 95616, USA;1. School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China;2. Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Qingdao 266237, China;3. Shandong Key Laboratory of Environmental Processes and Health, Shandong University, Qingdao 266237, China;1. Department of Chemical Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran;2. Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, Canada;3. Health and Environment Research Center, Tabriz University of Medical Sciences, Tabriz, Iran;4. Department of Water Resources Engineering, University of Tabriz, Tabriz, Iran;1. College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China;2. Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China;3. Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China |
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| Abstract: | An upflow anaerobic packed bed reactor was operated continuously with synthetic saline wastewater at different initial COD concentrations (COD0 = 1900–6300 mg/L), salt concentrations (0–5%, w/v) and hydraulic retention times (θH = 11–30 h) to investigate the effect of those operating parameters on COD removal from saline synthetic wastewater. Anaerobic salt tolerant bacteria, Halanaerobium lacusrosei, were used as dominant microbial culture in the process. The percent COD removal reached up to 94% at COD0 = 1900 mg/L, 19 h hydraulic retention time and 3% salt concentration. No substrate inhibition effect was observed at high feed CODs. Increasing hydraulic retention time from 11 h to 30 h resulted in a substantial improvement in the COD removal from 60% to 84% at around COD0 = 3400 mg/L and 3% salt concentration. Salt inhibition effect on COD utilization was observed at above 3% salt concentration. Modified Stover–Kincannon model was applied to the experimental data to determine the biokinetic coefficients. Saturation value constant, and maximum utilization rate constant of Stover–Kincannon model for COD were determined as KB = 5.3 g/L day, Umax = 7.05 g/L day, respectively. |
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