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Development of granular sludge for textile wastewater treatment

Muda, Khalida and Aris, Azmi and Salim, Mohd. Razman and Ibrahim, Zaharah and Yahya, Adibah and Loosdrecht, Mark C.M. van and Ahmad, Azlan and Nawahwi, Mohd. Zaini (2010) Development of granular sludge for textile wastewater treatment. Water Research, 44 (15). 4341 - 4350. ISSN 0043-1354

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Official URL: http://dx.doi.org/10.1016/j.watres.2010.05.023

Abstract

Microbial granular sludge that is capable to treat textile wastewater in a single reactor under intermittent anaerobic and aerobic conditions was developed in this study. The granules were cultivated using mixed sewage and textile mill sludge in combination with anaerobic granules collected from an anaerobic sludge blanket reactor as seed. The granules were developed in a single sequential batch reactor (SBR) system under alternating anaerobic and aerobic condition fed with synthetic textile wastewater. The characteristics of the microbial granular sludge were monitored throughout the study period. During this period, the average size of the granules increased from 0.02 ± 0.01 mm to 2.3 ± 1.0 mm and the average settling velocity increased from 9.9 ± 0.7 m h-1 to 80 ± 8 m h-1. This resulted in an increased biomass concentration (from 2.9 ± 0.8 g L-1 to 7.3 ± 0.9 g L-1) and mean cell residence time (from 1.4 days to 8.3 days). The strength of the granules, expressed as the integrity coefficient also improved. The sequential batch reactor system demonstrated good removal of COD and ammonia of 94% and 95%, respectively, at the end of the study. However, only 62% of color removal was observed. The findings of this study show that granular sludge could be developed in a single reactor with an intermittent anaerobic-aerobic reaction phase and is capable in treating the textile wastewater.

Item Type:Article
Uncontrolled Keywords:Color removal; Granulation; Granule characterization; Sequencing batch reactor; Textile wastewater
Subjects:Unspecified
Divisions:Civil Engineering
ID Code:25102
Deposited By: Kamariah Mohamed Jong
Deposited On:22 May 2017 07:39
Last Modified:22 May 2017 07:58

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