Chemical, microbial and physical properties of manufactured soils produced by co-composting municipal green waste with coal fly ash. Bioresource technology [Bioresour Technol] Journal article | | Title | Chemical, microbial and physical properties of manufactured soils produced by co-composting municipal green waste with coal fly ash. | | Author(s) | Belyaeva ON, Haynes RJ | | Institution | School of Land, Crop and Food Sciences/CRC CARE, The University of Queensland, St. Lucia, Queensland 4072, Australia. | | Source | Bioresour Technol 2009 Jun 16. | | Abstract | 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 6days. 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. | | Language | ENG | | Pub Type(s) | JOURNAL ARTICLE
| | PubMed ID | 19539464 |
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