LOCIE Laboratory, Université de Savoie, Polytech Annecy-Chambery, Savoie Technolac, 73376 Le Bourget du Lac, France.
Bioresour Technol. 2012 Nov;124:59-67. doi: 10.1016/j.biortech.2012.08.018. Epub 2012 Aug 14.
Investigation on the sensivity to temperature variations has been achieved on a full-scale experimental dairy wastewater treatment plant including an unheated but insulated upflow anaerobic sludge blanket. A simple steady-state heat transfer model based on energy balance has been designed to forecast the biogas production depending on ambient air and dairy wastewater temperatures variations. Energy balance has been described for any part of the digestion plant. Calculated heat losses were in the same range than observed losses with an uncertainty of about 10%. From the equalization tank to the digester the average heat loss under cold period was close to 10°C due to convection and conduction. Mesophilic conditions are not respected for couples of ambient air and wastewater temperatures ranging respectively from 8-35 to 35-29°C. Technical solutions are suggested to increase the biogas production.
已经在包括未加热但隔热的上流式厌氧污泥床的全尺寸实验性乳制品废水处理厂中实现了对温度变化的敏感性调查。设计了一个简单的基于能量平衡的稳态传热模型，以根据环境空气和乳制品废水温度的变化预测沼气产量。已经为消化厂的任何部分描述了能量平衡。计算出的热损失与观察到的损失处于相同范围，不确定性约为 10%。在寒冷时期，从均衡池到消化池的平均热损失由于对流和传导接近 10°C。对于环境空气和废水温度范围分别为 8-35 到 35-29°C 的组合，中温条件得不到满足。建议采取技术措施来提高沼气产量。
