Goethe-University, Goethe-Center for Scientific Computing, Kettenhofweg 139, 60325 Frankfurt a.M., Germany.
Potsdam-Bornim e.V. (ATB), Leibniz-Institut für Agrartechnik, Max-Eyth-Allee 100, 14469 Potsdam, Germany.
Bioresour Technol. 2015 Feb;178:350-358. doi: 10.1016/j.biortech.2014.08.060. Epub 2014 Aug 23.
The focus of this work is the development of a model for the estimation of methane emissions for storage tanks of biogas plants. Those can be estimated depending on (i) hydraulic retention time in the digester, (ii) an arbitrary removal rate of the digestate from the storage tank and (iii) arbitrary temperature conditions in the storage tank. Furthermore, the model is capable of considering an arbitrary mixture of manure and crops in the input material. The model was validated by data from 21 full scale biogas plants in Germany digesting cow manure and crops. A realistic scenario for the removal rate and temperature conditions in the storage tank was then investigated and special emphasis was given to the effect of hydraulic retention time and proportion of crops in the mixture on the input VS methane yield from the digester and the storage tank.
这项工作的重点是开发一种用于估算沼气厂储罐甲烷排放量的模型。这些模型可以根据(i)消化器中的水力停留时间、(ii)从储罐中任意去除消化物的速率以及(iii)储罐中的任意温度条件进行估算。此外，该模型还能够考虑输入物料中任意比例的粪便和作物。该模型通过来自德国 21 个处理奶牛粪便和作物的大型沼气厂的数据进行了验证。然后研究了储罐中去除速率和温度条件的实际情况，并特别强调了水力停留时间和混合物中作物比例对消化器和储罐中输入 VS 甲烷产率的影响。
