caa a22 4500 605506698 CHVBK 20210128100628.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00253-015-6537-x doi (NATIONALLICENCE)springer-10.1007/s00253-015-6537-x Nutrient removal and biogas upgrading by integrating freshwater algae cultivation with piggery anaerobic digestate liquid treatment [Elektronische Daten] [Jie Xu, Yongjun Zhao, Guohua Zhao, Hui Zhang] An integrated approach that combined freshwater microalgae Scenedesmus obliquus (FACHB-31) cultivation with piggery anaerobic digestate liquid treatment was investigated in this study. The characteristics of algal growth, biogas production, and nutrient removal were examined using photobioreactor bags (PBRbs) to cultivate S. obliquus (FACHB-31) in digestate with various digestate dilutions (the concentration levels of 3200, 2200, 1600, 1200, 800, and 400mgL−1 chemical oxygen demand (COD)) during 7-day period. The effects of the level of pollutants on nutrient removal efficiency and CO2 removal process were investigated to select the optimum system for effectively upgrade biogas and simultaneously reduce the nutrient content in digestate. The treatment performance displayed that average removal rates of COD, total nitrogen (TN), total phosphorous (TP), and CO2 were 61.58-75.29, 58.39-74.63, 70.09-88.79, and 54.26-73.81%, respectively. All the strains grew well under any the dilution treatments. With increased initial nutrient concentration to a certain range, the CO4 content (v/v) of raw biogas increased. Differences in the biogas enrichment of S. obliquus (FACHB-31) in all treatments mainly resulted from variations in biomass productivity and CO2 uptake. Notably, the diluted digestate sample of 1600mgL−1 COD provided an optimal nutrient concentration for S. obliquus (FACHB-31) cultivation, where the advantageous nutrient and CO2 removals, as well as the highest productivities of biomass and biogas upgrading, were revealed. Results showed that microalgal biomass production offered real opportunities to address issues such as CO2 sequestration, wastewater treatment, and biogas production. Springer-Verlag Berlin Heidelberg, 2015 Biogas enrichment nationallicence Microalgae nationallicence Nutrient removal nationallicence Piggery wastewater nationallicence Scenedesmus obliquus nationallicence Xu Jie College of Biological Chemical Science and Engineering, Jiaxing University, 314001, Jiaxing, People's Republic of China aut Zhao Yongjun College of Biological Chemical Science and Engineering, Jiaxing University, 314001, Jiaxing, People's Republic of China aut Zhao Guohua College of Biological Chemical Science and Engineering, Jiaxing University, 314001, Jiaxing, People's Republic of China aut Zhang Hui College of Biological Chemical Science and Engineering, Jiaxing University, 314001, Jiaxing, People's Republic of China aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/15(2015-08-01), 6493-6501 0175-7598 99:15<6493 2015 99 253 https://doi.org/10.1007/s00253-015-6537-x 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/s00253-015-6537-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xu Jie College of Biological Chemical Science and Engineering, Jiaxing University, 314001, Jiaxing, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Yongjun College of Biological Chemical Science and Engineering, Jiaxing University, 314001, Jiaxing, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Guohua College of Biological Chemical Science and Engineering, Jiaxing University, 314001, Jiaxing, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Hui College of Biological Chemical Science and Engineering, Jiaxing University, 314001, Jiaxing, People's Republic of China aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/15(2015-08-01), 6493-6501 0175-7598 99:15<6493 2015 99 253