期刊
BIORESOURCE TECHNOLOGY
卷 100, 期 21, 页码 5203-5209出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.05.032
关键词
Available water; Available nutrients; Compost; Fly ash; Green waste
Increasing proportions of coal fly ash were co-composted with Municipal green waste to produce manufactured soil for landscaping use. Only the 100% green waste treatment reached a thermophilic composting phase (>= 50 degrees C) which lasted for 6 days. The 25% and 50% ash treatments reached 36-38 degrees C over the same period while little or no self-heating occurred in the 75% and 100% ash treatments. Composted green waste had a low bulk density and high total and macro-porosity. Addition of 25% ash to green waste resulted in a 75% increase in available water holding capacity. As the proportions of added ash in the composts increased, the organic C, soluble C, microbial biomass C, basal respiration and activities Of beta-glucosidase, L-asparaginase, alkali phosphatase and arylsulphatase enzymes in the composted products all decreased. It could be concluded that addition of fly ash to green waste at a proportion higher than 25% did not improve the quality parameters of manufactured soil. (C) 2009 Elsevier Ltd. All rights reserved.
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