Department of Engineering, Aarhus University, Blichers Allè 20, 8830 Tjele, Denmark.
Sci Total Environ. 2011 Dec 1;410-411:161-71. doi: 10.1016/j.scitotenv.2011.09.017. Epub 2011 Oct 5.
Identification of different factors that affect emissions of gasses, including volatile organic compounds (VOCs) is necessary to develop emission abatement technology. The objectives of this research were to quantify and study temporal variation of gas emissions from a model pig house under varying ventilation rates. The used model was a 1:12.5 scale of a section of a commercial finishing pig house. The VOC concentrations at inlet, outlet, and slurry pit of the model space were measured using Proton-Transfer-Reaction Mass Spectrometry (PTR-MS). PTR-MS can measure the temporal variations of odor compounds' emission from the slurry pit in real time. The emissions of H(2)S and 14 VOCs were lower compared to real pig buildings except for ammonia, which indicated possible other sources of those compounds than the slurry in the slurry pit. The ventilation rate affected significantly on ammonia and trimethylamine emission (p<0.05). The hydrogen sulfide (H(2)S) emission was independent of the ventilation rate. VFAs' emission dependency on ventilation rate increased with the increase of carbon chain. Phenols, indoles and ketones showed the positive correlation with ventilation rate to some extent. Generally, compounds with high solubility (low Henry's constant) showed stronger correlation with ventilation rates than the compounds with high Henry's constant.
确定影响气体排放（包括挥发性有机化合物 (VOCs)）的不同因素对于开发减排技术是必要的。本研究的目的是量化和研究不同通风率下模型猪舍气体排放的时间变化。所使用的模型是商业育肥猪舍的一个 1:12.5 比例的截面。使用质子转移反应质谱 (PTR-MS) 测量模型空间的入口、出口和浆坑处的 VOC 浓度。PTR-MS 可以实时测量浆坑中气味化合物排放的时间变化。除氨外，H（2）S 和 14 种 VOC 的排放量低于实际猪舍，这表明除了浆坑中的浆液外，这些化合物可能还有其他来源。通风率对氨和三甲胺的排放有显著影响（p<0.05）。硫化氢（H（2）S）的排放与通风率无关。挥发性脂肪酸（VFAs）的排放对通风率的依赖性随碳链的增加而增加。酚类、吲哚和酮类在某种程度上与通风率呈正相关。一般来说，溶解度高（亨利常数低）的化合物与通风率的相关性比亨利常数高的化合物更强。
