Mahmoud Nidal, Zeeman Grietje, Gijzen Huub, Lettinga Gatze
Department of Agricultural, Environmental and Systems Technology, Sub-Department of Environmental Technology, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, Netherlands.
Water Res. 2004 May;38(9):2347-57. doi: 10.1016/j.watres.2004.01.041.
The treatment of sewage at 15 degrees C was investigated in a one-stage upflow anaerobic sludge blanket (UASB) reactor and a UASB-Digester system. The latter consists of a UASB reactor complemented with a digester for mutual sewage treatment and sludge stabilisation. The UASB reactor was operated at a hydraulic retention time of 6h and a controlled temperature of 15 degrees C, the average sewage temperature during wintertime of some Middle East countries. The digester was operated at 35 degrees C. The UASB-Digester system provided significantly (significance level 5%) higher COD removal efficiencies than the one-stage UASB reactor. The achieved removal efficiencies in the UASB-Digester system and the one-stage UASB reactor for total, suspended, colloidal and dissolved COD were 66%, 87%, 44% and 30%, and 44%, 73%, 3% and 5% for both systems, respectively. The stability values of the wasted sludge from the one-stage UASB reactor and the UASB-Digester system were, respectively, 0.47 and 0.36g CH(4)-COD/g COD. Therefore, the anaerobic sewage treatment at low temperature in a UASB-Digester system is promising.
在单级上流式厌氧污泥床（UASB）反应器和UASB-消化器系统中研究了15摄氏度下的污水处理情况。后者由一个UASB反应器和一个用于相互污水处理及污泥稳定化的消化器组成。UASB反应器在水力停留时间为6小时、控制温度为15摄氏度（中东一些国家冬季的平均污水温度）的条件下运行。消化器在35摄氏度下运行。UASB-消化器系统的化学需氧量（COD）去除效率显著高于单级UASB反应器（显著性水平为5%）。UASB-消化器系统和单级UASB反应器中总COD、悬浮COD、胶体COD和溶解性COD的去除效率分别为66%、87%、44%和30%，以及44%、73%、3%和5%。单级UASB反应器和UASB-消化器系统排出污泥的稳定性值分别为0.47和0.36克甲烷-COD/克COD。因此，在UASB-消化器系统中进行低温厌氧污水处理具有前景。
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