Autoflocculation of Scenedesmus quadricauda: effects of aeration rate aeration gas CO2 concentration and medium nitrogen concentration

Nguyen Thanh Tien, . and Uemura Yoshimitsu, . and Krishnan Vijendren, . and Nadila Abdul Khalid, . Autoflocculation of Scenedesmus quadricauda: effects of aeration rate aeration gas CO2 concentration and medium nitrogen concentration. pp. 11-17. ISSN 2289-1692

After microalgal cultivation step a recent method to harvest microalgae is adding flocculant into microalgal liquid culture to cause flocculation. Flocculated cells are easy to concentrate since their sedimentation time and successive filtering time are expected to be shorter. In this sense autoflocculation of microalgae may be a beneficial phenomenon for easing the harvesting process of microalgae. In this study autoflocculation was investigated for the growth of Scenedesmus quadricauda a type of fresh water microalgae at 25 C in a 5-L column photobioreactor. The BG11 medium was used. The effects of aeration rate CO2 concentration in aeration gas and nitrogen concentration in culture medium on auto flocculating behavior were investigated. Higher aeration rate higher CO2 concentration and higher nitrogen concentration caused more flocculation. In other words autoflocculation became prominent at the condition range where the final cell biomass concentration was lower in general.

Full text available from: Official URL: http://ijbr.utp.edu.my/uploads/68_111_oqhbg18-01-2...

Abstract

After microalgal cultivation step a recent method to harvest microalgae is adding flocculant into microalgal liquid culture to cause flocculation. Flocculated cells are easy to concentrate since their sedimentation time and successive filtering time are expected to be shorter. In this sense autoflocculation of microalgae may be a beneficial phenomenon for easing the harvesting process of microalgae. In this study autoflocculation was investigated for the growth of Scenedesmus quadricauda a type of fresh water microalgae at 25 C in a 5-L column photobioreactor. The BG11 medium was used. The effects of aeration rate CO2 concentration in aeration gas and nitrogen concentration in culture medium on auto flocculating behavior were investigated. Higher aeration rate higher CO2 concentration and higher nitrogen concentration caused more flocculation. In other words autoflocculation became prominent at the condition range where the final cell biomass concentration was lower in general.

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Item Type:	Article
AGROVOC Term:	Scenedesmus
AGROVOC Term:	Algae
AGROVOC Term:	Aquatic organisms
AGROVOC Term:	Aquatic plants
AGROVOC Term:	Biodiesel
AGROVOC Term:	Biofuels
AGROVOC Term:	Flocculation
AGROVOC Term:	Aeration
AGROVOC Term:	Growth
AGROVOC Term:	Centrifugation
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/24043

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