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Journal of Fisheries and Aquatic Science

Year: 2017 | Volume: 12 | Issue: 4 | Page No.: 197-206
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Authors

Arif Azizi Che Harun

Nor Aini Huda Mohammad

Mhd Ikhwanuddin

Mhd Ikhwanuddin

Noraznawati Ismail

Zaharah Ibrahim

Nor Azman Kasan

Nor Azman Kasan

Keywords

Background and Objective: Biological flocculant or bioflocculant have been used in aquaculture industry as it can be applied easily and are environmentally friendly. Biofloc technology has been used in aquaculture using bioflocculant concept or mechanisms. This study was aimed to test and applied bioflocculant-producing bacteria isolated from biofloc for flocculation process potentially used as inoculum for rapid formation of biofloc. Materials and Methods: For the purpose of this study, isolated bacteria from the biofloc sample were identified as bioflocculant-producing bacteria using yeast peptone glucose agar as it shows highly mucoid and ropy colonies morphology. From six species of bioflocculant-producing bacteria [(Bacillus infantis (B. infantis), Bacillus cereus (B. cereus), Bacillus safensis (B. safensis), Halomonas venusta (H. venusta), Nitratireductor aquimarinus (N. aquimarinus) and Pseudoalteromonas], there was 64 consortium of bioflocculant-producing bacteria were produced using the sum of combination calculation. These 64 consortium were tested for flocculation activity using kaolin clay suspension method. One-way analysis of variance (ANOVA) with post hoc and Tukey test was used to compare the differences of flocculation activity of each bacterial consortium. Results: Out of the 64 consortium, there were 19 consortium showed more than 80% of flocculation activity. The most consortium that has more than 80% flocculation activity derived from consortiums of single and combination of two bioflocculant-producing bacteria species. Consortium of B. infantis and B. cereus found to have the highest flocculation activity followed by single species of B. infantis and N. aquimarinus which were 94.3, 92.9 and 90.6%, respectively. Conclusion: In this study, each consortium of bioflocculant-producing bacteria produced different types of extracellular polymeric substances thus affecting ability in flocculation activity test. Information on extracellular polymeric substances produced by different consortium of bioflocculant-producing bacteria will potentially to be used as inoculum for rapid formation of biofloc.
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How to cite this article

Arif Azizi Che Harun, Nor Aini Huda Mohammad, Mhd Ikhwanuddin, Noraznawati Ismail, Zaharah Ibrahim and Nor Azman Kasan, 2017. Consortium of Bioflocculant-Producing Bacteria as Inoculum on Flocculation Process for Sustainable Production of Pacific Whiteleg Shrimp, Penaeus vannamei. Journal of Fisheries and Aquatic Science, 12: 197-206.

DOI: 10.3923/jfas.2017.197.206

URL: https://scialert.net/abstract/?doi=jfas.2017.197.206

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