Treatment of dilute wastewater in a UASB reactor at a moderate temperature: Performance aspects

被引：28
|
作者：
Agrawal, LK [1 ]
Harada, H [1 ]
Okui, H [1 ]
机构：
[1] NAGAOKA UNIV TECHNOL,DEPT ENVIRONM SYST ENGN,NAGAOKA,NIIGATA 94021,JAPAN
来源：
JOURNAL OF FERMENTATION AND BIOENGINEERING | 1997年 / 83卷 / 02期
关键词：
sewage; developing countries; anaerobic process; UASB reactor; treatment performance; COD mass balance; sludge retention time; granule size distribution;
D O I：
10.1016/S0922-338X(97)83579-9
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
The treatability of dilute wastewater by a UASB reactor was evaluated. After being seeded with digested sewage sludge, a 110-l reactor was operated at 25 degrees C under continuous feeding with synthetic wastewater having a COD of 300 mg/l for over 700 d. The hydraulic retention time (HRT) was successfully decreased in steps to 9 h (0.73 kg COD/m(3)/d). Granules began to be observed after the reactor had been in operation for 9 months. At an HRT of 9 h, the following results were obtained: soluble and total COD removal, 81+/-5% and 73+/-7%, respectively; methane production, 212 Nl/kg COD removed and 153 Nl/kg COD added; substrate conversion, 0.24 kg COD removed/kg VSS/d.
引用
收藏
页码：179 / 184
页数：6
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