title: Effects of added polyacrylamide on changes in water states during the composting of kitchen waste.
abstract: The effects of adding polyacrylamide (PAM), to attempt to delay the loss of capillary water and achieve a better level of organic matter humification, in the composting of kitchen waste were evaluated. Four treatments, with initial moisture content of 60 % were used: 0.1 % PAM added before the start of composting (R1), 0.1 % PAM added when the thermophilic phase of composting became stable (at >50 °C) (R2), 0.1 % PAM added when the moisture content significantly decreased (R3), and no PAM added (R4). The introduction of PAM in R1 and R2 significantly increased the capillary force and delayed the loss of moisture content and capillary water. The introduction of PAM in R2 and R3 improved the composting process, in terms of the degradation of biochemical fractions and the humification degree. These results show that the optimal time for adding PAM was the initial stage of the thermophilic phase.
authors.affiliation: Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, People's Republic of China.
authors.forename: Yu-Qiang
authors.initials: YQ
authors.lastname: Yang
authors.forename: Zhuo-Xian
authors.initials: ZX
authors.lastname: Chen
authors.forename: Xue-Qing
authors.initials: XQ
authors.lastname: Zhang
authors.forename: Li-Fang
authors.initials: LF
authors.lastname: Hu
authors.forename: Dong-Sheng
authors.initials: DS
authors.lastname: Shen
authors.forename: Yu-Yang
authors.initials: YY
authors.lastname: Long
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D004553:Electric Conductivity; D005735:Garbage; D012987:Soil; D013696:Temperature; D014867:Water / Q000737:chemistry*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D012987:Soil; D014867:Water; D000099166:Polyacrylamides