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The potential of bioflocculant-producing bacteria as inoculum for biofloc based systems

Che Harun, Arif Azizi and Ghazali, Nurarina Ayuni and Che Hashim, Nurul Fakriah and Mohammad, Nor Aini Huda and Ikhwanuddin, Mhd. and Ismail, Noraznawati and Ibrahim, Zaharah and Kasan, Nor Azman (2018) The potential of bioflocculant-producing bacteria as inoculum for biofloc based systems. Journal of Environmental Biology, 39 (5). pp. 917-922. ISSN 0254-8704


Official URL: http://dx.doi.org/10.22438/jeb/39/5(SI)/9


Aim: Biological flocculants has been widely used around the world to replace the usage of synthetic flocculants for wastewater treatment.Anew green technology using biological flocculant known as biofloc system was developed which offers zero water exchanged, low feed conversion ratio (FCR) and high nutritional profile. This study was conducted to determine the most potential bioflocculant-producing bacteria isolated from biofloc sampleinPacific Whiteleg shrimp,P. vannameiculture pond. Methodology: Biofloc sample was collected using Imhoff cone and bacteria was isolated. The most abundant bacteria isolated throughout P. vannamei culture period was selected for screening of bioflocculant-producing bacteria usingYPG medium and flocculation activity using floc-jar test. Results: Screening of bioflocculant-producing bacteria showed that B. infantis, N. aquimarinus, B. cereus, H. venusta, Pseudoalteromonas sp., and B. safensis were characterized as highly mucoid and ropy colony morpologies. The highest flocculation activity with 93% was showed by B. infantis followed by N. aquimarinus (91%), B. cereus (87%), H. venusta (79%), Pseudoalteromonas (78%), while the lowest flocculation activity was showed byB. safensiswith 69%. Interpretation: As bacteria grew, extracellular polymeric substances (EPS) produced were involved in flocculation process. Each bacteria produced different EPS composition which differed their ability in flocculation process. Therefore, bacteria with high flocculation activity are potentially used as inoculum to increase flocculation processinbiofloc production.

Item Type:Article
Uncontrolled Keywords:bioflocculant-producing bacteria, extracellular polymeric substance, flocculation activity, priological flocculants
Subjects:Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Biosciences and Bioengineering
ID Code:85414
Deposited By: Yanti Mohd Shah
Deposited On:16 Jun 2020 06:48
Last Modified:16 Jun 2020 06:48

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