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Characterization of separated pig manure composted with a variety of bulking agents at low initial C/N ratios
Troy, Shane M.; Healy, Mark G.; Kwapinski, Witold
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. Irish Department of Agriculture Food and Fisheries - Research Stimulus Fund Programme (RSFP) - National Development Plan 2007-2013
Keyword(s): Germination; Oxygen uptake rate; Oxitop system; Swine; Decanter centrifuge; Different litter amendments; Organic household waste; Sawdust litter; Straw; Turnover; Phytotoxicity; Maturity; Storage; Losses; Carbon
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Contributor(s): |~|
Institution: NUI Galway
File Format(s): application/pdf
First Indexed: 2015-11-10 09:26:06 Last Updated: 2015-11-10 09:26:06