Abstract：
:The effect of pile mixing on greenhouse gas (GHG) emissions during dairy manure composting was determined using large flux chambers designed to completely cover replicate pilot-scale compost piles. GHG emissions from compost piles that were mixed four times during the 80 day trial were approximately 20% higher than emissions from unmixed (static) piles. For both treatments, carbon dioxide (CO(2)), methane (CH(4)), and nitrous oxide (N(2)O) accounted for 75-80%, 18-21%, and 2-4% of GHG emissions, respectively. Seventy percent of CO(2) emissions and 95% of CH(4) emissions from all piles occurred within first 23 days. By contrast, 80-95% of N(2)O emissions occurred after this period. Mixed and static piles released 2 and 1.6 kg GHG (CO(2)-Eq.) for each kg of degraded volatile solids (VS), respectively. Our results suggest that to minimize GHG emissions, farmers should store manure in undisturbed piles or delay the first mixing of compost piles for approximately 4 weeks.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Ahn HK,Mulbry W,White JW,Kondrad SLdoi
10.1016/j.biortech.2010.10.142subject
Has Abstractpub_date
2011-02-01 00:00:00pages
2904-9issue
3eissn
0960-8524issn
1873-2976pii
S0960-8524(10)01798-0journal_volume
102pub_type
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