Water state changes during the composting of kitchen waste

Dong-Sheng Shen; Yu-Qiang Yang; Huan-Lin Huang; Li-Fang Hu; Yu-Yang Long

doi:10.1016/j.wasman.2015.01.011

Water state changes during the composting of kitchen waste

Waste Manag. 2015 Apr:38:381-7. doi: 10.1016/j.wasman.2015.01.011. Epub 2015 Feb 7.

Authors

Dong-Sheng Shen¹, Yu-Qiang Yang², Huan-Lin Huang¹, Li-Fang Hu³, Yu-Yang Long⁴

Affiliations

¹ Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China.
² Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Zhejiang Lantu Environmental Protection Co., Ltd, Hangzhou 310014, PR China.
³ College of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, PR China.
⁴ Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China. Electronic address: longyy@zjgsu.edu.cn.

PMID: 25661690
DOI: 10.1016/j.wasman.2015.01.011

Abstract

Changes in water states during the composting of kitchen waste were determined. Three experiments, R(55), R(60), and R(65), with different initial moisture contents, 55%, 60%, and 65%, respectively, were performed. Three water states, entrapped water (EW), capillary water (CW), and multiple-molecular-layer water (MMLW), were monitored during the experiments. Changes only occurred with the EW and CW during the composting process. The percentage of EW increased, and the percentage of CW decreased as the composting process progressed. The R(60) experiment performed better than the other experiments according to changes in the temperature and carbon-to-nitrogen ratio (C/N). The percentage of EW correlated well (P<0.05) with the dissolved organic carbon content (DOC), electrical conductivity (EC), pH, and C/N, and was affected by the hemicellulose and cellulose contents.

Keywords: Composting; Kitchen waste; Principal component analysis; Water state.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Garbage*
Recycling*
Refuse Disposal
Solid Waste / analysis*
Water / analysis*

Substances

Solid Waste
Water