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Enhanced aerobic sludge granulation in cyclic aerobic granular sludge bioreactor (CAgSBio) by Mg2+ augmentation

Anuar, Aznan Nor and Abd Azizi, Azri Hizami and Mohamed, Mohd. Firdaus (2010) Enhanced aerobic sludge granulation in cyclic aerobic granular sludge bioreactor (CAgSBio) by Mg2+ augmentation. Project Report. Faculty of Civil Engineering, Skudai, Johor. (Unpublished)

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Abstract

Two sequencing batch reactors (SBRs) known as Cyclic Aerobic Granular Sludge Bioreactor (CAgSBio) were concurrently operated to investigate the effect of Mg2+ augmentation on aerobic granulation. Augmentation with 10 mg/l Mg2+ in R2 significantly decreased the sludge granulation (defined as that over 15% of granules were larger than 0.6 mm) time from 32 days to 18 days, at the same time, the mean diameter of the granules in R2 was 2.9 mm after the granulation, which was consistently larger than that (1.8 mm) in R1. Mg2+-fed granules were denser and more compact, showed better settling and had higher polysaccharide contents, but it did not result in a difference in microbial morphology. The results demonstrated that Mg2+ enhanced the sludge granulation process in the sequencing batch reactor.

Item Type:Monograph (Project Report)
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Civil Engineering
ID Code:18886
Deposited By:INVALID USER
Deposited On:25 Nov 2011 08:33
Last Modified:25 Nov 2011 08:33

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