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Identification of biodiesel yield and its properties from microalgae Botryococcus sp isolated at Sembrong dam

Risit, Wellson (2017) Identification of biodiesel yield and its properties from microalgae Botryococcus sp isolated at Sembrong dam. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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Recently, the unceasing dependency upon fossil-based feedstock has triggered fuel shortages, volatility of fuel price hike and numerous discharging of carbon dioxide resulted from the burning of fossil fuel linked to global warming. Years ago there were many researches tried to find alternatives fuel as to resolve the dwindling of fuel stocks. The discoveries of high lipids content of microalgae have paved a way of instigating more research over microalgae. The purpose of this study is to investigate the potential of Botryococcus sp as an alternative sustainable and renewable biodiesel to diminish off immoderate dependency over fossil fuel. Botryococcus sp was isolated from Sembrong Dam water that is located in Johor Malaysia by using standard plating method and classified morphologically. The growth factors such as light, initial pH and rotation speed were optimized by adopting techniques from previous studies. Botryococcus sp biodiesel properties were conducted and compared with ASTM 6715 for fuel properties. The results show that, Sembrong Dam water quality is polluted as compared with Interim National Water Quality Standard, Malaysia (INWQS) and high concentration of chlorophyll-a in Dam Sembrong water is due to presence of algal blooms. It was found that Botryococcus sp has the best growth condition under illumination of 6000 lux, initial pH 7 and continuous rotation speed of 30 rpm. Under optimized and well-monitored cultivation, Botryococcus sp is able to yield a maximum oil content of 64.8%. The transesterification process has effectively converted the green crude to biodiesel up to 88%. The microalgae biodiesel quality is suitable to be used as fuel as it complies with ASTM 6715. On the basis of the results of this research, it can be concluded that Sembrong Dam water is polluted and undergoing eutrophication. Botryococcus sp isolated from Sembrong Dam is a great potential for biodiesel feedstock due its rich oil content.

Item Type: Thesis (Masters)
Subjects: T Technology > TP Chemical technology > TP315-360 Fuel
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 27 Mar 2018 03:40
Last Modified: 27 Mar 2018 03:40
URI: http://eprints.uthm.edu.my/id/eprint/9908
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