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Bio-flotation harvesting of chlorella vulgaris microalgae using jatropha curcas L. protein-oil emulsion

Chin, Fook Loy (2019) Bio-flotation harvesting of chlorella vulgaris microalgae using jatropha curcas L. protein-oil emulsion. Faculty of Engineering Technology, Universiti Malaysia Pahang.

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Abstract

This study is a whole new approach to recover microalgae from aqueous medium using bio-flotation with its effectiveness examined. This new bio-flotation method involves utilizing a Jatropha curcas protein extract-oil emulsion mixed with sunflower oil for flotation removal of Chlorella vulgaris microalgae from its culture medium. Asia, particularly Japan and Taiwan are the largest producer country for Chlorella vulgaris in the world and different uses of this microalgae is being discover from time to time involving food, medical, aquaculturally, water treatment, skincare, and biofuel industry. Whereby, the dewatering stage of microalgae production is always a critical issue. Researches and comparison have been done among current common dewatering method including coagulation, flocculation, centrifugation, sedimentation, and many more to improvise this study. This project covered the process from microalgae cultivation, protein extraction of Jatropha seed, oil emulsion testing to flotation experiment under various parameters. The effectiveness of this method under various factors has been determined, including operating parameters such as pH, protein-oil emulsion dosage, and mixing time. A maximum flotation efficiency of 81% was achieved under protein-oil emulsion dosage of 20ml/L, pH 2, mixing time 4 min. Furthermore, the change of zeta potential of the microalgae is analysed and showed a mark difference in value affected by the protein-oil emulsion. This flotation method is not only simple, low cost, environmentally friendly, but also an efficient method for harvesting microalgae from culture medium. For the future scope, improvement should be focus on the pH limitations to enhance the feasibility of this method for large scale industrial implementation.

Item Type: Undergraduates Project Papers
Additional Information: Project Paper (Bachelor of Engineering Technology in Energy & Environmental) -- Universiti Malaysia Pahang – 2019, SV: DR. NASRIN KHODAPANAH, NO. CD: 12194
Uncontrolled Keywords: Bio-flotation; Chlorella vulgaris microalgae;
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Faculty/Division: Faculty of Engineering Technology
Depositing User: Mrs. Sufarini Mohd Sudin
Date Deposited: 07 Aug 2020 02:14
Last Modified: 07 Aug 2020 02:14
URI: http://umpir.ump.edu.my/id/eprint/28962
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