AMMONIA AND GREENHOUSE GAS EMISSIONS FROM CO-COMPOSTING OF DEAD HENS WITH MANURE AS AFFECTED BY FORCED AERATION RATE

作者：Zhu Z; Dong H^*; Xi J; Xin H

来源：Transactions of the ASABE, 2014, 57(1): 211-217.

DOI：10.13031/trans.57.10206

• Composting
• Dead hens
• Greenhouse gas
• NH3
• Ventilation rate

The effect of ventilation rate (VR) on ammonia and greenhouse gas emissions from co-composting dead hens mixed with hen manure was quantified. Three VR levels of 0.9, 0.7, and 0.5 m(3) h(-1) were evaluated. Gaseous concentrations were measured using a multi-gas infrared photoacoustic analyzer, VR was measured with flowmeters, and the gas emission rate was computed from the VR and gas concentration. Decomposition of the carcasses over the 11-week composting period was greater than 88%. VR was found to significantly affect NH3, CO2, and CH4 emissions (p < 0.05). Specifically, cumulative emissions per kg of initial matter for VR of 0.9, 0.7, and 0.5 m(3) h(-1) were, respectively, 2.4, 2.0, and 1.2 g NH3; 78, 66, and 42 g CO2; 120, 90, and 52 mg CH4; and 6.4, 6.1, and 5.1 mg N2O. Hence, the study results suggest that the ventilation rate can be adjusted to reduce NH3 and GHG emissions from animal mortality compositing.

• 出版日期2014-2
• 单位中国农业科学院农业环境与可持续发展研究所