Required minimum granule size in UASB reactor and characteristics variation with size

被引：78

作者：

Bhunia, Puspendu ^{[1
]}

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

机构：

[1] Indian Inst Technol, Dept Civil Engn, Kharagpur 721302, W Bengal, India

来源：

BIORESOURCE TECHNOLOGY | 2007年 / 98卷 / 05期

关键词：

settling velocity; minimum size of granules; size distribution; VSS/SS ratio; specific gravity; methanogenic activity;

D O I：

10.1016/j.biortech.2006.04.019

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The objective of this study was to define minimum size of bioparticles that could be classified as granules, to offer all advantages of granular sludge. Based on the theory of sedimentation, the minimum diameter bioparticles, which should be considered as granules was found out for specific gravity of sludge ranging between 1.01 and 1.05. For example, for specific gravity of 1.035 the minimum diameter of granules required for better sludge retention was 0.34 mm. The diameter based on this theory was evaluated by carrying out settling column analysis of a granular sludge obtained from lab-scale UASB reactor and verified with microscopic observation. To find out the effect of granules size on the nature of biodegradability, specific methanogenic activity (SMA) was carried out. It was observed that SMA increased with size of bioparticles tested in the range of 0.27-3.03 mm. The change in VSS/SS ratio and specific gravity was observed with size of granules. Consideration of variation in specific gravity with size of granules increased the degree of validation of sedimentation theory for the calculation of granules diameter. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：994 / 999

页数：6

共 25 条

[1] Sedimentological evolution in an UASB treating SYNTHES, a new representative synthetic sewage, at low loading rates [J].

Aiyuk, S ;

Verstraete, W .

BIORESOURCE TECHNOLOGY, 2004, 93 (03) :269-278

[2]

ALPHENAAR PA, 1993, APPL MICROBIOL BIOT, V39, P276, DOI 10.1007/BF00228619

[3]

*APHA AWWA WPCF, 1998, STAND METH EX WAT WA

[4] Variation of bulk properties of anaerobic granules with wastewater type [J].

Batstone, DJ ;

Keller, J .

WATER RESEARCH, 2001, 35 (07) :1723-1729

[5]

Bell K, 1997, PERFORM ART ENT CAN, V31, P5

[6] Comparative granule characteristics and biokinetics of sucrose-fed and phenol-fed UASB reactors [J].

Chou, HH ;

Huang, JS .

CHEMOSPHERE, 2005, 59 (01) :107-116

[7]

DOLFING J, 1997, THESIS AGR U WAGENIN

[8] MAXIMUM COD LOADING CAPACITY IN UASB REACTORS AT 37-DEGREES-C [J].

FANG, HHP ;

CHUI, HK .

JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE, 1993, 119 (01) :103-119

[9] HIGH-RATE PERFORMANCE AND CHARACTERIZATION OF GRANULAR METHANOGENIC SLUDGES IN UPFLOW ANAEROBIC SLUDGE BLANKET REACTORS FED WITH VARIOUS DEFINED SUBSTRATES [J].

FUKUZAKI, S ;

NISHIO, N ;

NAGAI, S .

JOURNAL OF FERMENTATION AND BIOENGINEERING, 1995, 79 (04) :354-359

[10] Characteristics of sludge developed under different loading conditions during UASB reactor start-up and granulation [J].

Ghangrekar, MM ;

Asolekar, SR ;

Joshi, SG .

WATER RESEARCH, 2005, 39 (06) :1123-1133

← 1 2 3 →