Department of Biological and Environmental Engineering, Cornell University, Riley-Robb Hall, Ithaca, NY 14853, USA.
Bioresour Technol. 2010 Aug;101(15):5842-51. doi: 10.1016/j.biortech.2010.03.023. Epub 2010 Mar 30.
Anaerobic digestion of brewery wastewater solids in the form of primary sludge was investigated for its potential as a source of energy (methane). We operated a low-rate (hydraulic retention time (HRT)=solids retention time (SRT)) continuously stirred anaerobic digester (CSAD) and a high-rate (SRT>HRT) anaerobic sequencing batch reactor (ASBR) in parallel for 250 days. We found that high-rate anaerobic digestion was beneficial for solids-rich waste flows even during a long-term operating period that included a shock load of nonbiodegradable total solids. The ASBR biomass achieved a higher specific methanogenic activity compared to the CSAD biomass (0.257+/-0.043 vs. 0.088+/-0.008 g CH(4)-COD g(-1)VSS d(-1)), which aided in stability during the shock load with total solids. The methane yield for the ASBR was 40-34% higher than for the CSAD (0.306 vs. 0.219 l CH(4)g VS(-1) fed for days 1-183 and 0.174 vs. 0.130 l CH(4)g VS(-1) fed for days 184-250, respectively). Finally, we operated an ASBR for an additional 295 days to evaluate the effect of temperature variation on system stability. A stable performance was achieved between the operating temperatures of 22-41 degrees C.
采用低负荷（水力停留时间（HRT）=固体停留时间（SRT））连续搅拌厌氧消化器（CSAD）和高负荷（SRT>HRT）厌氧序批式反应器（ASBR），对以初沉污泥形式存在的啤酒废水固体的厌氧消化产甲烷潜力进行了研究。我们发现，即使在包括非生物降解总固体冲击负荷的长期运行期间，高负荷厌氧消化对富含固体的废水流也是有益的。与 CSAD 生物量相比，ASBR 生物量的特定产甲烷活性更高（0.257+/-0.043 对 0.088+/-0.008 g CH(4)-COD g(-1)VSS d(-1)），这有助于在总固体冲击负荷期间保持稳定。ASBR 的甲烷产率比 CSAD 高 40-34%（第 1-183 天分别为 0.306 对 0.219 l CH(4)g VS(-1)和第 184-250 天分别为 0.174 对 0.130 l CH(4)g VS(-1)）。最后，我们又运行了一个 ASBR 295 天，以评估温度变化对系统稳定性的影响。在 22-41 摄氏度的操作温度之间实现了稳定的性能。
