Effects of woody peat and superphosphate on compost maturity and gaseous emissions during pig manure composting
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193 (China)
- College of Environmental Science and Engineering, Hunan University, Changsha 410082 (China)
Highlights: • Woody peat was used as a bulking agent for pig manure composting. • Woody peat mixed with 10% superphosphate negatively impacted on the biodegradation process. • Woody peat mixed with 10% superphosphate significantly reduced the odor gas and total greenhouse gas (CH{sub 4} + N{sub 2}O) emissions. - Abstract: This study investigated the effect of calcium superphosphate on compost maturity and gaseous emissions during pig manure composting with woody peat as the bulking agent. Two treatments were conducted with or without the addition of calcium superphosphate (10% dry weight of the composting mass), which were denoted as the control and superphosphate-amended treatment, respectively. Results show that the composting temperature of both treatments was higher than 50 °C for more than 5 days, which is typically required for pathogen destruction during manure composting. Compared to the control treatment, the superphosphate-amended treatment increased the emission of nitrogen oxide, but reduced the emission of methane, ammonia and hydrogen sulfide by approximately 35.5%, 37.9% and 65.5%, respectively. As a result, the total greenhouse gas (GHG) emission during manure composting was reduced by nearly 34.7% with the addition of calcium superphosphate. The addition of calcium superphosphate increased the content of humic acid (indicated by E{sub 4}/E{sub 6} ratio). Nevertheless, the superphosphate-amended treatment postponed the biological degradation of organic matter and produced the mature compost with a higher electrical conductivity in comparison with the control treatment.
- OSTI ID:
- 22742130
- Journal Information:
- Waste Management, Vol. 68; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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