Juteau Pierre, Tremblay Danielle, Ould-Moulaye Cheikh-Baye, Bisaillon Jean-Guy, Beaudet Réjean
INRS-Institut Armand-Frappier, Université du Québec, 531 Boulevard des Prairies, Laval, Québec, Canada H7V 1B7.
Water Res. 2004 Feb;38(3):539-46. doi: 10.1016/j.watres.2003.11.001.
Pig manure represents a very high-strength wastewater that is well suited for a self-heating aerobic thermophilic treatment. Here we report the use of 59-L Aerobic Thermophilic Sequencing Batch Reactors (AT-SBR) to study the treatment of pig manure with a HRT of 6 days. Temperatures up to 75 degrees C were reached without external heating by using Venturi-type aerators but these conditions were detrimental for the respiratory activity of the microflora. For COD removal, better performances were achieved when the temperature was limited to 50 degrees C. However, higher temperatures increased the rate of phosphorus crystallisation and the volatilisation of ammonia. A temperature of 50 degrees C was enough to eliminate faecal coliforms and Campylobacter spp., but 60 degrees C was needed for the efficient destruction of Clostridium perfringens. Consequently, an operating temperature of 60 degrees C appears to be a good compromise. Under these conditions, the BOD(5) decreases from 50.5 to 1.0 g L(-1), yielding a 98% removal.
猪粪是一种高强度废水，非常适合自热式好氧高温处理。在此，我们报告使用59升的好氧高温序批式反应器（AT-SBR），在水力停留时间为6天的条件下研究猪粪处理。通过使用文丘里式曝气器，无需外部加热即可达到高达75摄氏度的温度，但这些条件对微生物群落的呼吸活动不利。对于化学需氧量（COD）的去除，当温度限制在50摄氏度时可获得更好的效果。然而，较高的温度会提高磷的结晶速率和氨的挥发率。50摄氏度的温度足以消除粪大肠菌群和弯曲杆菌属，但有效杀灭产气荚膜梭菌则需要60摄氏度。因此，60摄氏度的操作温度似乎是一个很好的折衷方案。在这些条件下，五日生化需氧量（BOD₅）从50.5克/升降至1.0克/升，去除率达98%。
