数字农科院2.0

CH4, NH3, N2O and NO emissions from stored biogas digester effluent of pig manure at different temperatures

文献类型： 外文期刊

作者： Wang, Yue;Dong, Hongmin;Zhu, Zhiping;Li, Lulu;Zhou, Tanlong;Jiang, Bo;Wang, Yue;Dong, Hongmin;Zhu, Zhiping;Xin, Hongwei

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关键词： Biogas digester effluent;Ammonia;Methane;Nitrous oxide;Temperature;Pig manure

期刊名称： AGRICULTURE ECOSYSTEMS & ENVIRONMENT

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收录情况： SCI

摘要： Emissions of ammonia (NH3) and greenhouse gases (GHG) from digested pig manure storage have negative agronomic and environmental implications. The study was undertaken to evaluate how temperature affects NH3, GHG (i.e., methane (CH4) and nitrous oxide (N2O)) and nitric oxide (NO) emitted from a pig manure based biogas digester effluent (BDE) storage system. Six groups of 125 L of BDE were stored in triplicate for 99 days at 5, 10, 15, 20, 25 degrees C and uncontrolled temperature condition. (UT: temperature ranged from 32 degrees C to 20 degrees C) for gas monitoring using the dynamic emission vessel method. BDE characteristics were analyzed weekly during the storage. The results showed that all gas emissions were extremely low for the 5,10 and 15 degrees C regimens. The critical temperature for N2O and NO emissions from BDE storage was 25 degrees C. As the temperature increased from 5 degrees C to 25 degrees C, the N loss ratio increased from 8.9% to 41.9%, and NH3 was the main nitrogen loss form, accounting for 4.4-34.9% of the TN. The overall GHG emissions were dominated by N2O, which accounted for more than 53% of the CO2-eq emissions for all of the regimens. The CH4 emission factor was 0.001-0.019 Lg(-1) VS; the N2O emission factor was in the range of 0.0003-0.0007 kg N2O-N kg(-1) N for 5, 10, 15 and 20 degrees C regimens, while being 0.0038 and 0.0016 kg N2O-N kg(-1) N for 25 degrees C and UT regimens, respectively. The results indicate that NH3 and N2O are the two major gas emissions from BDE storage, and the future research on mitigation for BDE storage should focus more on N2O and NH3. (C) 2015 Elsevier B.V. All rights reserved.

分类号： S

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