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Bioresour Technol. 2014 Jun;161:155-61. doi: 10.1016/j.biortech.2014.03.047. Epub 2014 Mar 21.

Characteristics and performance of aerobic granular sludge treating rubber wastewater at different hydraulic retention time.

Author information

1
Institute of Environmental and Water Resource Management (IPASA), WATER Research Alliance, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. Electronic address: nhasyimah9@gmail.com.
2
Institute of Environmental and Water Resource Management (IPASA), WATER Research Alliance, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. Electronic address: aznah@utm.my.
3
Institute of Environmental and Water Resource Management (IPASA), WATER Research Alliance, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia.

Abstract

The influence of hydraulic retention time (HRT, 24, 12, and 6h) on the physical characteristics of granules and performance of a sequencing batch reactor (SBR) treating rubber wastewater was investigated. Results showed larger granular sludge formation at HRT of 6h with a mean size of 2.0±0.1mm, sludge volume index of 20.1mLg(-1), settling velocity of 61mh(-1), density of 78.2gL(-1) and integrity coefficient of 9.54. Scanning electron microscope analyses revealed different morphology of microorganisms and structural features of granules when operated at various HRT. The results also demonstrated that up to 98.4% COD reduction was achieved when the reactor was operated at low HRT (6h). Around 92.7% and 89.5% removal efficiency was noted for ammonia and total nitrogen in the granular SBR system during the treatment of rubber wastewater.

KEYWORDS:

Aerobic granular sludge; Hydraulic retention time; Rubber wastewater; Sequencing batch reactor

PMID:
24704837
DOI:
10.1016/j.biortech.2014.03.047
[Indexed for MEDLINE]

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