title: Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste composting.
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 CH4, N2O, and NH3 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 CH4 emissions (by 85.8% and 80.5%, respectively) and decreased NH3 emissions (by 23.5% and 18.9%, respectively). However, a slight increase in N2O 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.
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China; Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China. Electronic address: yangfan19870117@126.com.
authors.forename: Guoxue
authors.initials: G
authors.lastname: Li
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Shi
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
authors.forename: Yiming
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000641:Ammonia / Q000032:analysis; D002133:Calcium Sulfate / Q000378:metabolism*; D011756:Diphosphates / Q000378:metabolism*; D008697:Methane / Q000032:analysis; D009585:Nitrogen Dioxide / Q000032:analysis; D010758:Phosphorus / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil / Q000737:chemistry*; D062611:Solid Waste / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D011756:Diphosphates; D012987:Soil; D062611:Solid Waste; C077769:phosphogypsum; D010758:Phosphorus; D000641:Ammonia; C033414:superphosphate; D008697:Methane; D009585:Nitrogen Dioxide; D002133:Calcium Sulfate
keywords: Composting; Gaseous emissions; Kitchen waste; Phosphogypsum; Superphosphate