title: Methane enhancement through co-digestion of chicken manure and thermo-oxidative cleaved wheat straw with waste activated sludge: A C/N optimization case.
abstract: The present study emphasized the co-digestion of the thermal-H2O2 pretreated wheat straw (WS) and chicken manure (CM) with the waste activated sludge at four levels of C/N (35:1, 30:1, 25:1 and 20:1). All C/N compositions were found significant (P<0.05) to enhance methane generation and process stability during the anaerobic co-digestion of WS and CM. The experimental results revealed that the composition having C/N value of 20:1 was proved as optimum treatment with the methane enhancing capability of 85.11%, CODs removal efficiency of 48.55% and 66.83% VS removal as compared with the untreated WS. The other compositions having C/N of 25:1, 30:1 and 35:1 provided 75.85%, 63.04% and 59.96% enhanced methane respectively as compared with the control. Pretreatment of the WS reduced its C/N value up to 65%. Moreover, to optimize the most suitable C/N composition, the process stability of the co-digestion of WS and CM was deeply monitored.
authors.affiliation: College of Engineering, Nanjing Agricultural University, Nanjing, Jiangsu 210031, China.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Hassan
authors.affiliation: College of Engineering, Nanjing Agricultural University, Nanjing, Jiangsu 210031, China. Electronic address: wmding@njau.edu.cn.
authors.forename: Weimin
authors.initials: W
authors.lastname: Ding
authors.affiliation: Institute of Animal Science, Jiangsu Academy of Agricultural Science, Nanjing, Jiangsu 210014, China.
authors.forename: Zhendan
authors.initials: Z
authors.lastname: Shi
authors.affiliation: College of Engineering, Nanjing Agricultural University, Nanjing, Jiangsu 210031, China.
authors.forename: Sanqin
authors.initials: S
authors.lastname: Zhao
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels; D002244:Carbon / Q000032:analysis / Q000737:chemistry* / Q000378:metabolism; D002645:Chickens; D006861:Hydrogen Peroxide / Q000737:chemistry; D008372:Manure; D008697:Methane / Q000378:metabolism*; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry* / Q000378:metabolism; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D014908:Triticum
chemical_list: D056804:Biofuels; D008372:Manure; D012722:Sewage; D002244:Carbon; D006861:Hydrogen Peroxide; D009584:Nitrogen; D008697:Methane
keywords: C/N optimization; Co-digestion of WS and CM; Methane enhancement; Oxidative cleaved WS