北京凌云翼数据科技有限公司

Beijing Upclouddata Technology

Shidi Ba, et al., Meta-analysis of greenhouse gas and ammonia emissions from dairy manure composting

竞猜彩票    学员文章    Shidi Ba, et al., Meta-analysis of greenhouse gas and ammonia emissions from dairy manure composting

学员文章系列十八

 

META-ANALYSIS

 

Shidi Ba, Qingbo Qu, Keqiang Zhang, Jeroen C.J. Groot 

Meta-analysis of greenhouse gas and ammonia emissions from dairy manure composting

Biosystems Engineering

Volume 193, May 2020, Pages 126-137

https://www.sciencedirect.com/science/article/pii/S1537511020300556

 

Abstract

In order to minimise nutrient losses, comprehensive overviews of the magnitude of gaseous emissions from manure composting processes and the factors that influence these losses are urgently needed。 This study presents a meta-analysis of greenhouse gases (GHGs) and ammonia (NH3) emissions from four main dairy manure composting methods (static, turning, windrow and silo) based on 41 scientific articles (153 treatments)。 Gaseous emissions and secondary variables such as average composting temperature, initial moisture content, initial total carbon (TC) and initial total nitrogen (TN) content from each compost treatment were extracted and normalised to enable inter-study comparison。 Six mitigation measures for composting were selected and mitigation efficiency (Em) of each measure on different gas emissions were calculated。 Gaseous emissions from different composting methods showed large differences。 Turning composting resulted in larger carbon and nitrogen losses compared to other composting methods。 Although silo composting significantly promoted NH3 emission, it reduced GHG losses by 82。84% compared with turning composting。 Principal component analysis showed that the initial TC and TN content of the composted material were crucial in mediating gaseous emissions。 Low TC and TN content can simultaneously reduce CH4, CO2 and N2O emissions。 Applying compost biofilters was the most effective way to reduce NH3 emission with ME value of −97%。 Adding sawdust or straw could reduce CH4 and N2O emissions by 66。3% and 44。0% respectively。 Gaseous emissions from dairy manure composting varied a lot and were affected by physical characteristics of composted material and management practices of composting。

2020年10月24日 16:02
浏览量:0
收藏