Al-Jamal Wafa, Mahmoud Nidal
Institute of Environmental and Water Studies, Birzeit University, Birzeit, The West Bank, Palestine.
Bioresour Technol. 2009 Feb;100(3):1061-8. doi: 10.1016/j.biortech.2008.07.050. Epub 2008 Sep 7.
Two community onsite UASB-septic tanks namely R1 and R2 were operated under two different HRT (2 days for R1 and 4 days for R2) in parallel over a year and monitored over the cold half of the year. During the monitoring period, the sewage was characterised by a high COD(tot) of 905mg/l with a high fraction of COD(ss), viz. about 43.7%, and rather low temperature of 17.3 degrees C. The achieved removal efficiencies in R1 and R2 for COD(tot), COD(sus), COD(col), COD(dis), BOD(5) and TSS were "51%, 83%, 20%, 24%, 45% and 74%" and "54%, 87%, 10%, 28%, 49% and 78%", respectively. The difference in the removal efficiencies of those parameters in R1 and R2 is marginal and was only significant (p<0.05) for COD(sus). The sludge filling period of the reactors is expected to be 4-7 years. In view of that, the UASB-septic tank system is a robust and compact system as it can be adequately designed in Palestine at 2 days HRT.
两个社区现场UASB化粪池，即R1和R2，在两种不同的水力停留时间（HRT）（R1为2天，R2为4天）下并行运行了一年，并在半年的寒冷时期进行了监测。在监测期间，污水的化学需氧量（COD）（总量）较高，为905mg/l，其中溶解性化学需氧量（COD）（ss）的比例较高，约为43.7%，且温度较低，为17.3摄氏度。R1和R2中化学需氧量（COD）（总量）、悬浮性化学需氧量（COD）（sus）、溶解性化学需氧量（COD）（col）、难降解化学需氧量（COD）（dis）、生化需氧量（BOD）（5）和总悬浮物（TSS）的去除效率分别为“51%、83%、20%、24%、45%和74%”和“54%、87%、10%、28%、49%和78%”。R1和R2中这些参数去除效率的差异很小，仅悬浮性化学需氧量（COD）（sus）的差异显著（p<0.05）。预计反应器的污泥填充期为4至7年。鉴于此，UASB化粪池系统是一个强大而紧凑的系统，因为在巴勒斯坦以2天的水力停留时间进行适当设计即可。
