Wong Yee Shian
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Wong Yee Shian
Official Name
Wong, Yee Shian
Alternative Name
Wong, Yee-Shian
Wong, Y. S.
Wong, Yee Shian
Yee-Shian, Wong
Y S Wong
Main Affiliation
Scopus Author ID
56004092100
Researcher ID
M-6006-2015

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Biohydrogen production from palm oil mill effluent with Moringa Oleifera seeds as support carrier in attached growth system

2020-06-10 , Hamid W.Z.W.A. , Nabilah Aminah Lutpi , Wong Yee Shian , Ong Soon An , Malek M.A.

Biohydrogen production by dark fermentation is one of the attracting alternatives for renewable energy in worldwide. By employing immobilized cells, hydrogen production and cell density could be improved. This study aimed to investigate the efficiency of Moringa Oleifera Seeds (MOS) immobilized cells in enhancing the biohydrogen production using repeated batch fermentation under mesophilic condition, 37°C. The efficiency of MOS as support carrier, effect of the initial pH (5.0-7.0) and performance of raw and diluted Palm Oil Mill Effluent (POME) using MOS immobilized cells were investigated using anaerobic sludge as inoculums. The cumulative hydrogen production results were fitted into a modified Gompertz equation to find the maximum hydrogen production. MOS immobilized cells was more efficient in producing hydrogen compare to suspended cells (without MOS). The optimal pH obtained using MOS immobilized cells was found to be at pH 6 using raw POME with the maximum hydrogen production (Hm) of 122 mL, the maximum hydrogen production rate (Rm) of 39.0 mL/h, and 560 ppm of hydrogen concentration.

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Study on biohydrogen production using different type of carrier materials in attached growth system

2020-06-10 , Ashah M.A. , Nabilah Aminah Lutpi , Wong Yee Shian , Ong Soon An , Malek M.A.

Renewable energy is known as clean energy with free from greenhouse gas emissions and global warming effects. It is generated from natural resources and one of the most promising renewable energy is biohydrogen. Biohydrogen production gets a great attention around the world because it could remove organic biomass and at the same time supplying clean hydrogen energy. In this study, three support carriers were used namely granular activated carbon (GAC), glass beads (GB) and moringa oleifera seeds (MOS). The main keys of this study was to identify the best support carrier that capable to enhance the biohydrogen production in attached growth system using Palm Oil Mill Effluent (POME) as feedstock. On the other hand, the physicochemical of the attached-biofilm were also investigated by using Scanning Electron Microscopy (SEM). Other parameter such as hydrogen concentration, volume of biogas, and kinetic study by using modified Gompertz equation has also been studied. At the end of the study, the best performance of biohydrogen production was performed by using GAC with hydrogen yield (HY) = 1.52 mol H2/mol glucose and the hydrogen production rate (HPR) = 58.50 mmol H2/l.d, followed by GB which is HY = 1.43 mol H2/mol glucose and HPR = 54.840 mmol H2/l.d and the last, MOS with HY = 1.08 mol H2/mol glucose and HPR = 41.44 mmol H2/l.d. This study has shown that proper selection of support carrier could reflect the evolution of biohydrogen production.

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