Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste composting

Journal Article · Sun Feb 15 04:00:00 EST 2015 · Waste Management

DOI:https://doi.org/10.1016/J.WASMAN.2014.11.012· OSTI ID:22470198

Yang, Fan ^[1]; Li, Guoxue ^[1]; Shi, Hong; Wang, Yiming ^[1]

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1. College of Resources and Environmental Science, China Agricultural University, Beijing 100193 (China)

Highlights: • Effect of phosphogypsum and superphosphate on composting gas emissions was studied. • The reduction mechanisms of composting gas were clarified in this study. • No negative effect was caused on maturity with phosphogypsum and superphosphate. • CH{sub 4} and NH{sub 3} emission was decreased with phosphogypsum and superphosphate addition. • GHG decreased by 17.4% and 7.3% with phosphogypsum and superphosphate addition. - Abstract: This study investigated the effects of phosphogypsum and superphosphate on the maturity and gaseous emissions of composting kitchen waste. Two amended compost treatments were conducted using phosphogypsum and superphosphate as additives with the addition of 10% of initial raw materials (dry weight). A control treatment was also studied. The treatments were conducted under aerobic conditions in 60-L reactors for 35 days. Maturity indexes were determined, and continuous measurements of CH{sub 4}, N{sub 2}O, and NH{sub 3} were taken. Phosphogypsum and superphosphate had no negative effects on compost maturity, although superphosphate inhibited the temperature rise in the first few days. The addition of phosphogypsum and superphosphate drastically reduced CH{sub 4} emissions (by 85.8% and 80.5%, respectively) and decreased NH{sub 3} emissions (by 23.5% and 18.9%, respectively). However, a slight increase in N{sub 2}O emissions (by 3.2% and 14.8%, respectively) was observed. Composting with phosphogypsum and superphosphate reduced total greenhouse gas emissions by 17.4% and 7.3% respectively.

• OSTI ID: 22470198
• Journal Information: Waste Management, Journal Name: Waste Management Vol. 36; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
54 ENVIRONMENTAL SCIENCES
AEROBIC CONDITIONS
AMMONIA
COMPOSTING
GREENHOUSE GASES
HOUSEHOLDS
METHANE
NITROUS OXIDE
RAW MATERIALS
SULFATE MINERALS
SUPERPHOSPHATES