Application of chitosan as a flocculant for the cultures of the green alga: Scenedesmus acutus.

Nigam, B. P. and Ramanathan, P. K. and Venkataraman, L. V. (1980) Application of chitosan as a flocculant for the cultures of the green alga: Scenedesmus acutus. Archives of Hydorbiology, 88 (3). pp. 378-387.

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Abstract

Use of partially deacetylated chitin or chitosan (CSN) has been investigated as a potential cationic flocculant to concentrate the cultures of the alga ScenedesrnU$ acutus, The optimal concentration of 0.05 gil of chitosan could flocculate mass outdoor cultures with 6.3 times less energy inputs and minimal operation conditions compared to the use of desired centrifugal separator. Under comparable viscous resistance conditions, laboratory experiments were carried out using different flocculants, viz" C8N in CH3COOH, Ca(OH)2, KAl(S04)! Al~(SO')3 for their sedimentation rates. Chitosan gave a maximum value of 96.5 0/0 fall in algal cell concentration of the culture supernatant within 10 min compared to all the other flocculants tested. The optimum OD range for flocculation was found to be between 0,4 to 0.5 and pH 7.5 to 8.5. Since chitosan is a natural product and carbohydrate in nature, it appeats to have greater potential in concentration of algae in mass cultures without affecting the toxicological safety.

Item Type:	Article
Uncontrolled Keywords:	Scenedesmus acutus, algae, deacetylated chitin, chitosan, cationic flocculant
Subjects:	500 Natural Sciences and Mathematics > 07 Life Sciences > 04 Microbiology > 01 Algae
Divisions:	Food Microbiology
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	14 Nov 2014 07:38
Last Modified:	14 Nov 2014 07:38
URI:	http://ir.cftri.res.in/id/eprint/3064

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