Department of Environmental Engineering, Gebze Institute of Technology, Muallimkoy Campus, Kocaeli, Turkey.
J Biotechnol. 2012 Dec 15;164(2):232-7. doi: 10.1016/j.jbiotec.2012.08.016. Epub 2012 Aug 31.
Anaerobic contact reactor is a high rate anaerobic process consisting of an agitated reactor and a solids settling tank for recycling. It was proved earlier that this type of reactor design offers highly efficient performance in the conversion of organic matter to biogas. In this study, the effect of transient loading on reactor performance in terms of a number of key intermediates and parameters such as, COD removal, pH and alkalinity change, VFAs, effluent MLSS concentration and biogas efficiency over time was examined. For this purpose, a step increase of organic loading rate from 3.35kg COD/m(3)day to 15.61kg COD/m(3)day was employed. The hydraulic retention time decreased to a value of 8.42h by an increase in the influent flow-rate during the transient loading. It was observed that the mesophilic anaerobic contact reactor (MACR) was quite resistant to large transient shocks. The reactor recovered back to its baseline performance only in 15h after the shock loading was stopped. Hence, it can be concluded that this type of reactor design has a high potential in treating food processing wastewaters with varying flow characteristics.
厌氧接触反应器是一种高效厌氧工艺，由搅拌反应器和固体沉降池组成，用于循环利用。早期的研究已经证明，这种类型的反应器设计在将有机物转化为沼气方面具有高效的性能。在这项研究中，考察了瞬时负荷对反应器性能的影响，包括关键中间体和参数，如 COD 去除率、pH 值和碱度变化、VFAs、出水 MLSS 浓度和沼气效率随时间的变化。为此，采用有机负荷率从 3.35kg COD/m³·d 增加到 15.61kg COD/m³·d 的方法增加瞬时负荷。通过增加进水流量，水力停留时间降低至 8.42h。结果表明，中温厌氧接触反应器（MACR）对大的瞬时冲击具有很强的抵抗力。在冲击负荷停止后仅 15h，反应器就恢复到基线性能。因此，可以得出结论，这种类型的反应器设计在处理具有不同流量特性的食品加工废水方面具有很大的潜力。
