title: Distribution of C and N in soluble fractionations for characterizing the respective biodegradation of sludge and bulking agents.
abstract: This study utilized C and N distribution in different soluble fractionations instead of the routine C/N ratio to characterize the respective biodegradation of sludge and bulking agents in bio-drying or composting. For sludge, C was mainly distributed (31.8%) in the neutral detergent soluble and water insoluble fraction (SOL), whereas it was mainly distributed in the cellulose-like fraction (CEL) for straw (39.5%) and sawdust (45.8%). A large proportion of N was in the 35 °C water-soluble fraction (W35 °C) for sludge (34.0%) and straw (52.5%), while for sawdust it was in the lignin-like fraction (LIG; 49.4%). For sludge, the C and N loss were mainly contributed by W35 °C (36.9% and 52.4%). The other fractions also contributed a lot. For straw, 22.4% of C and 89.8% of N lose in W35 °C. The hemicellulose-like (HEM) and CEL fraction also gave a large contribution to C loss (28.5% and 40.1%), while contributing little to N loss.
authors.affiliation: Institute of Waste Treatment and Reclamation, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China.
authors.forename: Ling
authors.initials: L
authors.lastname: Zhao
authors.forename: Xiao-Yi
authors.initials: XY
authors.lastname: Wang
authors.forename: Wei-Mei
authors.initials: WM
authors.lastname: Gu
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Shao
authors.forename: Pin-Jing
authors.initials: PJ
authors.lastname: He
mesh_terms: D001673:Biodegradation, Environmental; D002244:Carbon / Q000032:analysis*; D005591:Chemical Fractionation / Q000379:methods*; D007700:Kinetics; D008970:Molecular Weight; D009584:Nitrogen / Q000032:analysis*; D012722:Sewage / Q000737:chemistry*; D012995:Solubility; D014866:Waste Products / Q000032:analysis*
chemical_list: D012722:Sewage; D014866:Waste Products; D002244:Carbon; D009584:Nitrogen