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Characteristics of sludge developed under different loading conditions during UASB reactor start-up and granulation

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Title Characteristics of sludge developed under different loading conditions during UASB reactor start-up and granulation
 
Creator GHANGREKAR, MM
ASOLEKAR, SR
JOSHI, SG
 
Subject upflow anaerobic sludge
methanogenic sludge
molecular-mechanism
heavy-metals
granules
calcium
performance
location
uasb
olr
slr
granular sludge
sludge characteristics
mineral composition
 
Description Sludge characteristics available inside the reactor are of vital importance to maximize advantages of UASB reactor. The organic loading rate and sludge loading rate applied during start-up are among the important parameters to govern the sludge characteristics. Effects of these loading rates on the characteristics of the sludge developed are evaluated in six laboratory scale UASB reactors. The sludge characteristics considered are VSS/SS ratio of the sludge, sludge volume index, specific gravity, settling velocity and metal contents of the sludge developed under different loading rates. The experimental results indicate that, for developing good characteristics sludge, during primary start-up from flocculent inoculum sludge, organic loading rate and sludge loading rate should be in the range of 2.0-4.5 kg COD/m(3) d and 0.1-0.25 kg COD/kg VSS d, respectively (chemical oxygen demand, COD). Proper sludge granulation and higher COD removal efficiency will be achieved by these loading rates. (c) 2005
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-23T18:37:17Z
2011-12-26T12:56:33Z
2011-12-27T05:45:26Z
2011-08-23T18:37:17Z
2011-12-26T12:56:33Z
2011-12-27T05:45:26Z
2005
 
Type Article
 
Identifier WATER RESEARCH, 39(6), 1123-1133
0043-1354
http://dx.doi.org/10.1016/j.watres.2004.12.018
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10607
http://hdl.handle.net/10054/10607
 
Language en