Paracoccus denitrificans SD1 mediated augmentation with indigenous mixed cultures for enhanced removal of N,N-dimethylformamide from industrial effluents |
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| Institution: | 1. Department of Biochemistry, Gulbarga University, Gulbarga 585106, Karnataka, India;2. Department of Animal Sciences, University of Hyderabad, Hyderabad 500046, India;1. School of Environment, Tsinghua University, Beijing 100084, China;2. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China;1. Vanderbilt Microbiome Initiative, Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235, USA;2. Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ 86011, USA;3. Guangdong Eco-Engineering Polytechnic, Guangzhou 510520, China;4. School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, China;5. Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA;6. College of Natural Resources and Environmental Science, South China Agricultural University, Guangzhou 510642, China;7. Guangdong Laboratory for Lingnan Modern Agriculture, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China;8. Department of Pharmacy, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, China;9. Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau SAR 999078, China;1. College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China;2. School of Environmental and Resource Sciences, Zhejiang Agriculture and Forestry University, Lin?an 311300, China;3. College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China;4. Environmental Science and Engineering, University of Northern British Columbia, Prince George, British Columbia, Canada;1. Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi, 980-8579, Japan;2. Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi, 980-8579, Japan;3. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China |
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| Abstract: | Bioaugmentation is an effective treatment method to reduce recalcitrant pollutants from polluted sites. Dimethylformamide (DMF) is a very common toxic organic solvent among the effluents of textile and pharma industries. DMF was degraded by pre-adapted Paracoccus denitrificans SD1 with indigenous mixed cultures in both bioaugmentation and non-bioaugmentation conditions. In free cell condition, augmentation was not much significant due to competition among the bacterial cells and direct exposure of cells to toxic level of DMF. To enhance the degradation of DMF, cells were entrapped in PVA–alginate matrix individually and collectively for bioaugmentation experiments. Bioaugmentation is successful when immobilized P. denitrificans SD1 is introduced higher inoculum volume with indigenous cultures in continuous packed bed reactor system. This treatment has succeeded in removing 91.3% of 3% (v/v) DMF from the industrial effluent. This investigation advocates that bioaugmentation enhances the DMF removal efficiency by about 20% when compared to individual degradation by P. denitrificans SD1. |
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| Keywords: | Bioaugmentation Bioremediation Packed bed reactor Immobilization Waste-water treatment |
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