Regmi Shekhar, Ongwandee Maneerat, Morrison Glenn, Fitch Mark, Surampalli Rao
Department of Civil, Architectural, and Environmental Engineering, University of Missouri-Rolla, Rolla, MO 65409, USA.
J Air Waste Manag Assoc. 2007 Jun;57(6):761-8. doi: 10.3155/1047-3289.57.6.761.
Anaerobic lagoons are a major source of odor at concentrated animal feeding operations. Seven different kinds of artificial (geotextile and polyethylene foam) and natural (straw and redwood) permeable lagoon covers were evaluated for their potential to reduce odorous emissions generated by anaerobic waste lagoons. A novel floating sampling raft was constructed and used to simultaneously evaluate the effectiveness of lagoon covers on an operating swine waste lagoon. The air collected from the raft was evaluated for odor, total reduced sulfur (TRS) compounds, ammonia, total hydrocarbons, dimethyldisulfide, and trimethylamine. The emission rates from the lagoon were highly variable both temporally and spatially. All of the lagoon covers substantially reduced TRS emissions and odor. Geotextile fabric and a recycled foam cover exhibited the greatest reduction in total hydrocarbon emissions; natural covers were less effective. Because of consistently low emission rates of ammonia, no statistically significant reduction of ammonia emissions were observed from any of the lagoon covers.
厌氧泻湖是集中式动物饲养场的主要气味来源。评估了七种不同类型的人工（土工织物和聚乙烯泡沫）和天然（稻草和红木）可渗透泻湖覆盖物减少厌氧废物泻湖产生的恶臭排放的潜力。构建了一种新型浮动采样筏，并用于同时评估泻湖覆盖物对一个正在运行的猪粪泻湖的有效性。对从筏上收集的空气进行了气味、总还原硫（TRS）化合物、氨、总烃、二甲基二硫和三甲胺的评估。泻湖的排放率在时间和空间上变化很大。所有的泻湖覆盖物都大幅减少了TRS排放和气味。土工织物和回收泡沫覆盖物在总烃排放方面的减少最为显著；天然覆盖物的效果较差。由于氨的排放率一直很低，未观察到任何泻湖覆盖物对氨排放有统计学上的显著减少。
