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Characterization of aerobic granular sludge at various organic loading rates

Paper ID Volume ID Publish Year Pages File Format Full-Text
35240 45082 2009 4 PDF Available
Title
Characterization of aerobic granular sludge at various organic loading rates
Abstract

Aerobic granular sludge was cultivated from activated sludge with two types of supports, namely bivalve shell carrier (BSC) and anaerobic granules (ANG). Granules were characterized at different organic loading rates (OLRs) ranging from 2.5 to 15 kg COD/m3 d and these granules were observed to withstand high OLRs. The physico-chemical characteristics of the aerobic granules were better than those of seed sludge. The granule formation with ANG support was found to be similar to that of non-support cultivation, i.e. formation from activated sludge only. By contrast, BSC support showed better performance in terms of faster settleability, compactness and especially resistance against organic shock loading. It also enabled self-cleaning effect by removing biofilm attached on the reactor wall during the start-up phase resulting rapid granulation process.

Keywords
Aerobic granule; Shell support; Sequencing batch airlift reactor; Shock loading; Organic loading rate
First Page Preview
Characterization of aerobic granular sludge at various organic loading rates
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 44, Issue 2, February 2009, Pages 242–245
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering