Anaerobic co-digestion of wastes from fruit processing and activated sludge reactor in juice production industry

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Wang, Q.Y.^1,2 ; Tian, J.^2 ; Kato, M.T.^3 ; Rong, Y.J.^4 ; He, Y.L.^4 ; Ji, F.^2

School of Chemical Engineering and Technology, Xi'An Jiaotong University, Xi'an, China^1

Shaanxi Environmental Protection Research Institute, Co. Ltd., Xi'an, China^2

Department of Civil Engineering, Federal University of Pernambuco, Brazil^3

School of Human Settlements and Civil Engineering, Xi'An Jiaotong University, Xi'an, China^4

关键词: Activated sludge reactors;    Anaerobic co-digestion;    Biogas production;    Microbiological analysis;    Production industries;    Relative abundance;    Removal efficiencies;    Total volatile solids;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/3/012042/pdf
DOI  :  10.1088/1755-1315/186/3/012042

来源: IOP

【 摘 要 】

Anaerobic co-digestion of wastes from fruit processing wastes (FPW) and activated sludge reactor (WAS) were studied in a semi-continuous digester at 30-32 °C during 193 days. The best results of biogas yield and volumetric biogas production were 635.4 L•kg-1 total volatile solids (TVS) fed and 473.9 L•m-3•d-1, respectively, obtained when FPW:WAS ratio applied was 1:1 and retention time was 40 days. Biogas yield and volumetric biogas production increased 210% and 357%, respectively, when FPW:WAS ratio was changed from 0:1 to 1:1; and hydrolysis was also improved since TVS removal efficiency achieved nearly 75%. The microbiological analysis of samples taken at day 70, 135 and 168 supported these results with increased FPW:WAS ratio. Both the relative abundance of methanogens and hydrolytic bacteria were observed to increase significantly; in the case of hydrolysis, the percentage of Chloroflexi relative abundance increased from 17% at day 70 to 50% at day 168.