Utilization of Shrimp Skin Waste (Sea Lobster) As Raw Material for the Membrane Filtration

Abstract

Abstract. In view of the increasing littering of the sea banks by shells of crustaceans, a study was carried out to investigate the extraction and characterization of chitosan from skin waste of sea lobster i.e. 'Bamboo Lobster' (Panulirus versicolor). Chitosan was extracted using conventional methods such as pretreatment, demineralization, deprotienization, and deacetylation. The result showed that the degree of deacetylation of chitosan obtained is 70.02%. The FTIR spectra of the chitosan gave a characteristic of -NH 2 band at 3447 cm -1 and carbonyl group band at 1655 cm -1 . This chitosan has been used to prepare membrane. The chitosan membrane 2% has been prepared using phase inversion method with precipitation by solvent evaporation. The membranes were characterized by FTIR spectrophotometer, Nova 1200e using BJH method, and filtration method. The results show that thickness of the membrane is about 134 µm. The FTIR spectra show that functional groups present in the membrane are -NH, -CH, C=O, and -OH. Using BJH method obtained that the pore diameter is 3.382 nm with pore density is 8.95 x 10 5 pores/m 3 . By filtration method obtained that pure water flux (PWF) of the membrane are 386.662 and 489.627 l/m 2 .h at pressure 80-85 kPa and 90-100 kPa, respectively. These results show that skin waste of sea lobster was discovered as a raw material to prepare chitosan membrane. The membrane obtained is belonged to mesoporous group which may use in microfiltration process.

Effect of Weak Magnetic Field on the Structure and Physical Properties of Chitosan Membranes

“…Membranes chitosan (Ch) were prepared by casting solution method. The method has been reported in our previous study [2,5,20]. Mainly, the 2% wt of chitosan solution was prepared by dissolving 2% wt chitosan powder in acetic acid solution and subsequently stirring at 37 o C until formed homogeneous solution.…”

“…Chitosan is a natural polymer (biopolymer) obtained mainly by deacetylation of chitin with strong bases [1][2][3]. Chitin is mostly found in shells of crustaceans and insects, as well as cell walls of some fungi [4][5][6].…”

Performance Chitosan Membranes to Filter Humic Acid (HA) Waste from Aquatic Environment

“…Chitin, an abundant polymer found mostly in shellfish like shrimp, crabs, and prawns, is converted into the natural polymer chitosan through the process of alkaline deacetylation [12,13,14]. As a biomaterial, chitosan can be found in a variety of commercially viable forms, including gels, fibers, films, membranes, multifunctional microcrystalline powders, and liquids [15].…”