Microalgae are known as an alternative source of biomass energy to replace fossil fuels. The aim of the present study is to optimise the growth conditions and increase the lipid, carbohydrate and biomass productivity of Tetradesmus obliquus UPSI-JRM02 using response surface methodology with Design Expert software. Four variables (nitrogen concentration, temperature, pH, and light intensity) were optimised to enhance T. obliquus productivity. The highest lipid (33 ± 1.2mg/L/day), carbohydrate (51 ± 1.5 mg/L/day) and biomass (115 ± 1.4 mg/L/day) productivity were produced at a nitrogen concentration of 400 mg/L NO3
at 36 C with pH of 9.8, and light intensity of 23500 lux. The fatty acid methyl ester contains polyunsaturated fatty acid (C18:2, C18:3) and saturated fatty acid (C16:0). These results demonstrate the potential of T. obliquus to produce promising feedstock for biofuel production.  ..

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In recent years, the development of nanoparticle materials for water treatment has received great attention. From an industrial technological view point, the application of nanomaterials in the twenty-first century for water treatment will be the focal point of advanced materials design, processing and progress. In this context, the potential utilisation of different types of flocculants to clean up contaminated water becomes important to address the tremendous increase of water pollution resulting from continued high-level global industrialisation. A number of researchers have investigated the effectiveness of various nanoflocculants for this purpose. Although these nanoflocculants have been reported to successfully treat contaminated water, their flocculation performances are different. To the best of our knowledge, there is no review article which summarises the application and performance of nanoflocculants in the treatment of water containing various types of contaminants. This re.....

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