Feasibility study of a pilot-scale sewage treatment system combining an up-flow anaerobic sludge blanket (UASB) and an aerated fixed bed (AFB) reactor at ambient temperature.
Feasibility study of a pilot-scale sewage treatment system combining an up-flow anaerobic sludge blanket (UASB) and an aerated fixed bed (AFB) reactor at ambient temperature.
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DOI：
10.1016/j.biortech.2005.10.020
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发表时间：
2007
影响因子：
11.4
通讯作者：
H. Sumino;Masanobu Takahashi;Takashi Yamaguchi;K. Abe;N. Araki;S. Yamazaki;S. Shimozaki;A. Nagano-A.
中科院分区：
文献类型：
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作者：
H. Sumino;Masanobu Takahashi;Takashi Yamaguchi;K. Abe;N. Araki;S. Yamazaki;S. Shimozaki;A. Nagano-A.
在常温条件下，对17 m3污水处理中试系统进行了连续进水的可行性试验。该系统由UASB和曝气固定床反应器组成。固定床反应器的一些流出物返回到UASB进水中，以提供硫酸盐来源。进水中148- 162 mgl − 1的总BOD在最终出水中降低到更理想的11- 25 mgl − 1。在10°C下，乙酸和H2/CO2气体的产甲烷活性水平分别仅为35°C下的2%和0%。另一方面，UASB污泥的硫酸盐还原活性水平在10°C下相对较高，例如，与35°C下的活性水平相比，乙酸盐为18%，H2/CO2气体为9%。因此，在低温条件下，UASB中硫酸盐还原对BOD的氧化作用大于产甲烷。这种硫酸盐还原活性往往与从污泥中提取的DNA中腺苷-5 '-磷酸硫酸盐（APS）还原酶基因的拷贝数成正比。
A feasibility test of a 17m3-pilot-scale sewage treatment system was carried out by continuous feeding of raw municipal sewage under ambient temperature conditions. The system consisted of a UASB and an aerated fixed bed reactor. Some of the effluent from the fixed bed reactor was returned to the UASB influent in order to provide a sulfate source. The total BOD of 148–162mgl−1in the influent was reduced to a more desirable 11–25mgl−1in the final effluent. The levels of methane-producing activity from acetate and H2/CO2gas at 10°C were only 2% and 0% of those at 35°C, respectively. On the other hand, the sulfate-reducing activity levels of the UASB sludge were relatively high at 10°C, for example, 18% for acetate and 9% for H2/CO2gas, compared to the activity levels at 35°C. Therefore, BOD oxidization by sulfate reduction in the UASB was greater than that by methane production under low temperature conditions. This sulfate-reducing activity tended to be proportional to the copy number of adenosine-5′-phosphosulfate (APS) reductase genes in DNA extracted from the sludge.