Influence of biogas-induced mixing on granulation in UASB reactors

被引：12

作者：

Bhunia, Puspendu ^{[2
]}

Ghangrekar, M. M. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Civil Engn, Environm Engn & Management Sect, Kharagpur 721302, W Bengal, India

[2] Motilal Nehru Natl Inst Technol, Dept Civil Engn, Environm Engn Sect, Allahabad 211004, Uttar Pradesh, India

来源：

BIOCHEMICAL ENGINEERING JOURNAL | 2008年 / 41卷 / 02期

关键词：

granulation; granulation index (GI); mixing; UASB; velocity gradient;

D O I：

10.1016/j.bej.2008.04.016

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：

Studies have been carried out to correlate biogas-induced mixing and granulation in upflow anaerobic sludge blanket (UASB) reactors, treating low-strength as well as high-strength biodegradable wastewaters. A dimensionless granulation index (GI) has been framed taking into account the mixing in sludge bed due to produced biogas. Analysis of full-scale, pilot-scale and lab-scale UASB reactors treating actual wastewaters reveals the significance of biogas-induced mixing, represented by GI, on granulation of biomass in the reactors. For obtaining proper granulation in UASB reactors (percentage granules greater than 50%, w/w), resulting in higher chemical oxygen demand (COD) removal efficiency, it is recommended to maintain GI values in the range of 15,000-57,000. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：136 / 141

页数：6

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