Cemagref, UR GERE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France.
Bioresour Technol. 2012 Feb;105:1-8. doi: 10.1016/j.biortech.2011.11.024. Epub 2011 Nov 20.
In this study, the maximum ratio of greasy sludge to incorporate with waste activated sludge was investigated in batch and CSTR experiments. In batch experiments, inhibition occurred with a greasy sludge ratio of more than 20-30% of the feed COD. In CSTR experiments, the optimal greasy sludge ratio was 60% of the feed COD and inhibition occurred above a ratio of 80%. Hence, batch experiments can predict the CSTR yield when the degradation phenomenon are additive but cannot be used to determine the maximum ratio to be used in a CSTR configuration. Additionally, when the ratio of greasy sludge increased from 0% to 60% of the feed COD, CSTR methane production increased by more than 60%. When the greasy sludge ratio increased from 60% to 90% of the feed COD, the reactor yield decreased by 75%.
在这项研究中，通过批处理和连续搅拌式反应器（CSTR）实验，考察了含油污泥与剩余活性污泥最大混合比例。在批处理实验中，当含油污泥比例超过进料 COD 的 20-30%时，会出现抑制现象。在 CSTR 实验中，最佳含油污泥比例为进料 COD 的 60%，当比例高于 80%时会出现抑制现象。因此，当降解现象具有加性时，批处理实验可以预测 CSTR 的产率，但不能用于确定 CSTR 配置中要使用的最大比例。此外，当含油污泥比例从进料 COD 的 0%增加到 60%时，CSTR 甲烷产量增加了 60%以上。当含油污泥比例从进料 COD 的 60%增加到 90%时，反应器产率下降了 75%。
