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

被引：29

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

页码：179 / 184

页数：6

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