Low-strength wastewater treatment by a UASB reactor
Low-strength wastewater treatment by a UASB reactor
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UASB反应器处理低浓度废水
DOI：
10.1016/0960-8524(96)86817-9
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发表时间：
1996
影响因子：
11.4
通讯作者：
T. Viraraghavan
中科院分区：
文献类型：
--
作者：
Kripal Singh;H. Harada;T. Viraraghavan
采用半中试规模的上流式厌氧污泥床反应器对低浓度(500mgCOD/L)人工合成废水进行厌氧处理。在常温(20~35℃)、水力停留时间(HRT)为3h、有机负荷为4 kg·COD/m~3·d的条件下，COD和BOD的降解率分别为90~92%和94~96%。在标准温度和压力(STP)下，甲烷生成量约为141COD/kg L。由于反应器下部活性颗粒污泥浓度较高，COD在床层内的降解率达到80%。对污泥的形态观察表明，颗粒中含有不同的微生物群，其中杆状、甲烷丝状细胞在表面占主导地位。
This study describes the feasibility of anaerobic treatment of a low-strength (500 mg-COD/l) synthetic wastewater using a semi-pilot-scale upflow anaerobic sludge blanket (UASB) reactor. Under ambient temperature conditions (20–35°C) with a hydraulic retention time (HRT) of 3 h and corresponding organic loading of 4 kg-COD/m3-day, 90–92% COD and 94–96% BOD reductions were achieved. Methane production was found to be about 141 l/kg-COD removed at standard temperature and pressure (STP). Because of the presence of a high concentration of active granular sludge in the lower portion of the reactor, 80% reduction of COD occurred within the bed level. Morphological examination of the sludge showed that the granules contained diverse groups of microorganisms, where rod-type, Methanothrix-like, cells were dominant on the surface.