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Nolan, T., Troy, S.M., Healy, M.G., Kwapinski, W., Leahy, J.J., Lawlor, P.G.
2011
January
Bioresource Technology
Characterization of separated pig manure composted with a variety of bulking agents at low initial C/N ratios
Published
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Optional Fields
Germination Oxygen uptake rate Oxitop system Swine Decanter centrifuge DIFFERENT LITTER AMENDMENTS ORGANIC HOUSEHOLD WASTE SAWDUST LITTER STRAW TURNOVER PHYTOTOXICITY MATURITY STORAGE LOSSES CARBON
102
7131
7138
The aim of this study was to investigate the composting of separated pig manure solids with or without a variety of bulking agents at a low initial C/N ratio (12.5-23.3). Compost stability was investigated using an oxygen uptake rate (OUR) test and compost maturity was investigated using a germination index test. All treatments showed typical patterns of compost temperature. Temperatures above 60 degrees C were achieved by Day 2, followed by a thermophilic phase (50-60 degrees C), which lasted for 1 to 2 weeks followed by a cooling phase. The stability of one of treatments which did not contain any bulking agent - OUR of 25 mmol O-2 kg(-1) OM hour(-1) - was negatively affected by its initial high water content (69%). The addition of a bulking agent and initial water content below 60% were necessary to compost the separated solid fraction of pig manure at a low initial C/N ratio. (C) 2011 Elsevier Ltd. All rights reserved.
DOI 10.1016/j.biortech.2011.04.066
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