caa a22 4500 605498938 CHVBK 20210128100548.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00253-015-6709-8 doi (NATIONALLICENCE)springer-10.1007/s00253-015-6709-8 Conditions for supplemental biogenic substrates to enhance activated sludge degradation of xenobiotic [Elektronische Daten] [Lan Nguyen, Nyuk-Min Chong] The effects of biogenic presence on the degradation of xenobiotic organics by natural microbial populations have been reported as either advantageous or disadvantageous. The inconsistency of the reports implies there could be a turning point from disadvantageous to advantageous outcomes so that conditions may exist that could bring an optimum advantage. This study tested the supplementations of varying concentrations of sucrose and peptone, separately and combined, to acclimated activated sludge degradation of xenobiotic 2,4-D, while other operational and microbiological conditions were held constant. Our test results showed that biogenic may indeed enhance or slow down xenobiotic degradation rates. The highest enhancements exist at concentrations of 50 and 80mg/L, respectively, for sucrose and peptone when supplemented separately, and 20mg/L sucrose and 40mg/L peptone combined. Conditions for advantageous biogenic supplementation were identified for activated sludge degradation of a xenobiotic; specifically, the highest degradation rate enhancements occurred when biogenic supplementation was approximately 0.5 to 0.7 the concentration of 2,4-D base on chemical oxygen demand (COD), which brought a biomass yield of approximately double that yielded by 2,4-D. Kinetics analyses provided clues for the possible causes of advantageous and disadvantageous effects due to biogenic supplementation. Springer-Verlag Berlin Heidelberg, 2015 Xenobiotic degradation nationallicence Acclimated activated sludge nationallicence Biogenic supplement nationallicence Optimal degradation rate nationallicence Nguyen Lan Department of Environmental Engineering, DaYeh University, No. 168, University Road, 51591, Dacun Changhua, Taiwan, Republic of China aut Chong Nyuk-Min Department of Environmental Engineering, DaYeh University, No. 168, University Road, 51591, Dacun Changhua, Taiwan, Republic of China aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/19(2015-10-01), 8247-8257 0175-7598 99:19<8247 2015 99 253 https://doi.org/10.1007/s00253-015-6709-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00253-015-6709-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nguyen Lan Department of Environmental Engineering, DaYeh University, No. 168, University Road, 51591, Dacun Changhua, Taiwan, Republic of China aut NATIONALLICENCE 700 1- Chong Nyuk-Min Department of Environmental Engineering, DaYeh University, No. 168, University Road, 51591, Dacun Changhua, Taiwan, Republic of China aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/19(2015-10-01), 8247-8257 0175-7598 99:19<8247 2015 99 253