Nitrous Oxide Emissions from Aerated Composting of Organic Waste

详细信息    查看全文

• 作者：Yaowu He ; Yuhei Inamori ; Motoyuki Mizuochi ; Hainan Kong ; Norio Iwami ; and Tieheng Sun
• 刊名：Environmental Science & Technology
• 出版年：2001
• 出版时间：June 1, 2001
• 年：2001
• 卷：35
• 期：11
• 页码：2347 - 2351
• 全文大小：91K
• 年卷期：v.35,no.11(June 1, 2001)
• ISSN：1520-5851

文摘

The composting of high organic content wastes has beenshown to produce nitrous oxide (N₂O). This study wasinitiated to investigate the mechanisms of N₂O emissionsfrom aerated composting and to determine the optimaloperational conditions that minimize N₂O emissions. Theresults of our experiment in laboratory-scale compostersshowed that more than 95% of N₂O was produced during thelater period of composting when readily available carbonsources had been depleted. Significant increases inN₂O emission after nitrite (NO₂^-) addition, and good NO₂^- -N₂O correlation, indicates that N₂O was transformedfrom NO₂^-. Extremely high N₂O generation was observedafter NO₂^- addition in the presence and absence of compostedcattle manure. This suggests an identical mechanism forN₂O production in both treatments. However, the addition ofcomposted cattle manure resulted in an earlier initiationof the main N₂O generation period. Intermittent feeding offresh food waste postponed the main N₂O generationperiod, and reduced the mass-based N₂O emissions by20%.