A fast and simple method and technologies in drinking water supply are strongly needed in an emergency situation. One alternative method is based on membrane forwards osmosis (FO) technology. In this study, chitosan-based FO membranes have been developed into drinking water bags used as purification media for dirty water and seawater. The chitosan membrane used for the assembly of drinking water bags has a thickness of 0.043 mm, the porosity of 30.3%, the tensile strength of 28.83 kgf / mm2, swelling degree of 43.5% and elongation of 7.16%. The drinking water bags are made from a combination of polypropylene plastic (PP) and aluminum foil plastic with the interface of the FO membrane inside. The drinking water bag can be applied to purify dirty water and seawater into energy drinking water, which can be used for drinking water supply in an emergency situation. Energy drinks water is produced from the FO process using a variety of draw solution, specifically glucose, fructose, and sucrose. The highest drinking water flux was obtained by using 3M sucrose concentration as a draw solution. The clean water fluxes for dirty water and seawater samples were 5.25 L/m2hour and 4.25 L/m2hour respectively. The parameters drinking water quality test are proved that pH, total dissolved solids (TDS), salinity, electrical conductivity, heavy metals and the content of Escherichia coli bacteria are agreed with drinking water quality standards based on PERMENKES regulations No. 492/MENKES/Per/IV/2010. The FO drinking water bag based chitosan membrane has the potential to be used as an alternative solution for energy drinking water supply in an emergency.

Inorganic–organic composite membranes (IOCMs) are an alternative separation method developed for their straightforward process, economic benefits, and ease of scaling up. The IOCMs in this study were prepared from a biopolymer chitosan matrix and rice husk-based silica filler to remove impurities from crude biodiesel. The IOCMs were prepared through phase inversions, in which the priorly prepared silica particles were dispersed in the dope solution of chitosan. The maximum loading of the silica particles was 60%, capable of reducing the soap level, free glycerol level, and acid number from 547.9 to 12.2 mg/L, 54 to 0.041%, and 2.02 to 1.12 mgKOH/g. These reduced impurity values have satisfied the standardized quality. The chemical composition and morphology of the IOCM was characterized using Fourier-transform infrared spectroscopy and scanning electron microscope–energy dispersive X-Ray spectroscopy. The IOCM water absorption-based porosity and swelling degree were studied as well. Further investigation using isothermal modeling revealed the adsorption dependency against the Sips model equation (R2 = 0.99 and root-mean-square errors = 1.77 × 10−8). Even though regeneration is still a challenging factor in this study, the IOCM prepared from chitosan and rice husk-derived silica particles could be used in crude biodiesel purification.

Development of forward osmosis (FO) membranes became one of the alternative methods for drinking water supply in an emergency. In this research, drinking water bags based on FO membrane  have been developed using chitosan as the basic material of membrane. The chitosan membrane used for the manufacture of drinking water bags has a thickness of 0.043 mm, 30.3% porosity, tensile strength 28.83 kgf / mm2, swelling degree 43.5% and elongation of 7.16%. Drinking water bags are made with a combination of Polypropylene Plastic (PP) and aluminum foil with FO membrane inside. This drinking water bag can be applied for brackish water purification to be energy drinking water as one of the solutions for the drinking water supply in emergencies. FO process testing is done by using variation of sugar solution as the draw solution, that are glucose, fructose, sucrose and mixture. The concentration of applied draw solution is 1, 2 and 3M within 1 hour treatment. The highest water flux was obtained in 3M sucrose solution with a flux value of 5.25 L/m2hour. The results of drinking water quality parameters  analysis  in the form of pH, Total Dissolve Solid (TDS), salinity, conductivity, heavy metals and Escherichia coli (E. coli) contents showed that the FO water produc meets drinking water quality standards based on  Indonesian government regulation of drinking water quality. FO-membrane-based drinking water bags are potentially used as an alternative solution for the energy drinking water supply in an emergency.