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Biodegradation of remazol black b in sequential microaerophilic-aerobic operations by nar-2 bacterial consortium

Seyedeh, Nazanin Kardi and Abdul Rashid, Noor Aini and Ibrahim, Norahim and Ahmad, Azura (2016) Biodegradation of remazol black b in sequential microaerophilic-aerobic operations by nar-2 bacterial consortium. Environmental Earth Sciences, 75 (16). p. 1172. ISSN 1866-6280

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Official URL: http://dx.doi.org/10.1007/s12665-016-5984-8


The ability of the NAR-2 bacterial consortium, consisting of A1, C1, and L17, to degrade the azo dye model, Remazol Black B (RBB), was studied in an upflow packed-bed reactor for continuous sequential micro- aerophilic–aerobic batch operations. Continuous decolourisation was performed in a borosilicate glass col- umn (12 mm 9 20 mm) packed with surfactant-modified clinoptilolite immobilised by the NAR-2 bacterial consor- tium. In column bioreactor studies, decolourisation was observed at 45 ° C and was carried out by varying the flow rates and dye concentrations in a modified P5 medium with pH 7.0 under microaerophilic conditions. A decolourisation of 95.87 % of 0.1 g/L RBB was achieved at a flow rate of 0.2 mL/min under microaerophilic conditions by the immobilised NAR-2 bacterial consortium. An analysis of the decolourised and biodegradation products of the RBB using total aromatic amines showed that a reduction in the RBB resulted in the formation of aromatic amines. On further aerobic degradation for 15 days, the concentration of the amines dropped significantly, from an initial con- centration of 34 to 11 mg/L, following the aerobic batch treatment experiment. The findings of this study showed that SMC can be a support material for bacterial cell immobilisation in a single upflow reactor with intermittent microaerophilic–aerobic operations, and it was found to be suitable and eco-friendly for the degradation of azo dyes.

Item Type:Article
Additional Information:RADIS System Ref No:PB/2016/05518
Subjects:R Medicine
Divisions:Biosciences and Medical Engineering
ID Code:68191
Deposited By: Haliza Zainal
Deposited On:01 Nov 2017 03:21
Last Modified:20 Nov 2017 08:52

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