Department of Environmental Science, University of Eastern Finland, P.O. Box 1627, FIN-70211 Kuopio, Finland.
Environ Technol. 2011 Aug-Sep;32(11-12):1223-32. doi: 10.1080/09593330.2010.533198.
This study was carried out to quantify and identify the presence of somatic coliphages, RNA coliphages, sulphite-reducing clostridia, Clostridium tyrobutyricum or its related clostridia, faecal coliforms, enterococci and heterotrophs in a mixture of cattle slurry and waste food (whey and jam) that had undergone aerobic thermophilic treatment (ATT). We also investigated the influence of different factors, including pH, COD, temperature, odour removal, addition of waste food (whey and jam) and nitrogen losses, on the long-term ATT process. The processes were conducted semi-continuously with retention time of five days and with the waste food and slurry mixture (1:4) being added daily into the reactor. The experiments lasted seven days for each thermophilic temperature (50, 60 and 70 degrees C). Our work showed that, at the higher temperature of the ATT operation, the number of microorganisms declined much more rapidly than at the lower temperature and the final product was hygienically safe. The use of waste food (whey and jam) was beneficial because it buffered pH.
本研究旨在定量并确定在经过需氧高温处理（ATT）的牛粪便和废物（乳清和果酱）混合物中存在的体噬菌体、RNA 噬菌体、亚硫酸盐还原梭菌、丁酸梭菌或其相关梭菌、粪大肠菌群、肠球菌和异养菌。我们还研究了不同因素对长期 ATT 过程的影响，包括 pH 值、COD、温度、气味去除、废物（乳清和果酱）的添加和氮损失。该过程采用半连续方式进行，停留时间为五天，每天将废物和粪便混合物（1:4）添加到反应器中。每个嗜热温度（50、60 和 70°C）的实验持续七天。我们的工作表明，在 ATT 操作的较高温度下，微生物数量的下降速度比在较低温度下快得多，最终产品在卫生上是安全的。废物（乳清和果酱）的使用是有益的，因为它可以缓冲 pH 值。
