期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 3, 页码 2441-2447出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.10.140
关键词
Coal gasification wastewater; Thermophilic anaerobic; UASB; Phenol; Biodegradability
资金
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2010DX05]
- National High Technology Research Development Plan (863) of China [2007AA06A411]
Lurgi coal gasification wastewater (LCGW) is a refractory wastewater, whose anaerobic treatment has been a severe problem due to its toxicity and poor biodegradability. Using a mesophilic (35 +/- 2 degrees C) reactor as a control, thermophilic anaerobic digestion (55 +/- 2 degrees C) of LCGW was investigated in a UASB reactor. After 120 days of operation, the removal of COD and total phenols by the thermophilic reactor could reach 50-55% and 50-60% respectively, at an organic loading rate of 2.5 kg COD/(m(3) d) and HRT of 24h: the corresponding efficiencies were both only 20-30% in the mesophilic reactor. After thermophilic digestion, the wastewater concentrations of the aerobic effluent COD could reach below 200 mg/L compared with around 294 mg/L if mesophilic digestion was done and around 375 mg/L if sole aerobic pre-treatment was done. The results suggested that thermophilic anaerobic digestion improved significantly both anaerobic and aerobic biodegradation of LCGW. (C) 2010 Elsevier Ltd. All rights reserved.
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