The effect of soaking duration to Kappaphycus Alvarezii Sp. seaweed powder

Mohamad Raus, Nur Atirah Asna (2021) The effect of soaking duration to Kappaphycus Alvarezii Sp. seaweed powder. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Recently, people have become more conscious of the relation between diet and health, leading to increasing attention on the consumption of seaweeds. Therefore, the development of seaweed powder needs to be enhanced due to high demand and for advanced marketing of seaweed powder. The purpose of this study is to investigate the effect of soaking duration on Kappaphycus Alvarezii sp. seaweed powder during soaking treatment. In order to produce seaweed powder, significant soaking durations have been carried out on the seaweed. Based on the previous study, there has only little study on how soaking duration affects the production of seaweed powder. Hence, the effect of soaking duration was studied to analyse the toxicity of heavy metal content inside seaweed and the amount of moisture content of seaweed to guarantee a high seaweed quality and increase the shelf life of seaweed powder. The optimum soaking duration was observed to be 2 hours of soaking, at which seaweed exhibits desirable expansion and texture. The heavy metal contents of Arsenic (As), Cadmium (Cd) and Lead (Pb) were postulated to be reduced at the optimized soaking duration of 2 hours, based on critical review of the graph trend. The optimized soaking duration of 2 hours also showed an acceptable moisture content of 14.67%. Next, surface morphology structure was observed by carrying out Scanning Electron Microscopy (SEM) analysis to study the effect of various soaking duration towards seaweed. At optimum soaking of 2 hours, the surface morphology indicated smooth texture and obtained desired expansion corresponding to the increased moisture content and the surface was cleaner after soaking treatment as all the impurities had been removed thoroughly. Thus, the abundantly available seaweed can provide as a source of raw materials in the production of seaweed powder which will contribute to the industrial sector, especially in food and pharmaceutical productions that favour sustainability.

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