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Coal ash residues, including fly ash (FA) and lagoon ash (LA), were co-composted with dewatered sludge for 100 days in a bench-scale composting system and biological parameters were monitored to evaluate the effect of ash residues on the composting process. Coal ash residue amendment caused a rise in alkalinity and salinity, but had no adverse effect on the population of thermophilic bacteria except...
Co-composting of sewage sludge with coal fly ash was carried out for evaluating the effect of coal fly ash on nutrient transformations during sludge composting. Dewatered anaerobically-digested sewage sludge was mixed with sawdust used as a bulking agent at 2:1 (ww), and the mixtures were amended with coal fly ash at 0, 10, 25 and 35% (ww) and composted for 100 days. Addition of coal fly ash raised...
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