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- Title
生物质炭对城市污泥堆肥温室气体排放的影响.
- Authors
杨雨浛; 易建婷; 任小玉; 蒋越; 陈宏; 张成
- Abstract
Effects of biochar on greenhouse gas emissions were investigated by analyzing the dynamic characteristics of municipal sludge composting with and without biochar. The results showed that adding biochar increased the pile temperature, extended the altithermal temperature period, increased the decomposition rate of the composting pile, and reduced total carbon(TC), total organic carbon(TOC), and nitrogen loss(especially for NH4+-N). The TC, TOC, and total nitrogen(TN) levels showed significant differences(P < 0.05) between the two treatments. CH4 emissions mainly occurred during the altithermal temperature period and cooling phase in both the treatments, accounting for 76.40%~82.40% of the total emissions. Biochar increased the CH4 emissions, but this increase was non-significant compared with composting without biochar. CO2 emissions were primarily concentrated in the altithermal temperature period and cooling phase, accounting for 78.77%~78.83% of the total CO2 emissions. Unlike CH4 emissions, biochar reduced CO2 emissions. In addition, over 84% N2O emissions occurred in the rotten period. Biochar significantly reduced the N2O emissions, which were 18.94% lower than the treatment without biochar. CO2 emission equivalents of dry sludge were estimated to be 60.21 and 67.19 kg·t-1 in the with and without biochar treatments, respectively. The significant reduction in greenhouse gas emissions of 10.39% in the biochar treatment indicated that adding biochar reduced the greenhouse effect during sludge composting.
- Subjects
SLUDGE composting; BIOCHAR -- Environmental aspects; GREENHOUSE gases; CARBON dioxide mitigation; WASTE products
- Publication
Journal of Agro-Environment Science, 2018, Vol 37, Issue 3, p567
- ISSN
1672-2043
- Publication type
Article
- DOI
10.11654/jaes.2017-1229