STUDI POTENSI PENGGUNAAN KITOSAN CANGKANG KERANG HIJAU YANG DIMODIFIKASI SEBAGAI KOAGULAN ALAMI

• Main Author: Nur Arif, Maulana
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/35239
• Institution: Institut Teknologi Bandung

Coagulation process is one of water treatment process to remove suspended and colloidal material. One of coagulant which is commonly used is Al(SO4)3 or usually called as alum. The use of alum can cause trouble because the resulting inorganic residue which is carcinogenic can interfere with environment and health and is not biodegradable. This problem prompts to make use of coagulant from natural material such as chitosan. Chitosan can be produced from shells of mussel and crab which are very abundant in Indonesia. Production of shells from mussel could potentially be a waste because it has not been utilized well. One of the utilization of shells from mussel is to make chitosan as coagulant. The purpose of this study is to learn about potential of using chitosan from mussel shells as coagulant by testing the removal efficiency of main parameters in synthetic water. This is compared with alum and PAC as common coagulant and chitosan from crabs shell. Stages in this experiment include characterization of chitosan, synthetic water preparation as sample, jartest, and parameters test including turbidity, organic matter, and iron. In this study, found that deacetylation degree of chitosan from mussel shells is 77.80%. This result is lower than chitosan from crabs shell that is 87.64%. This will cause the coagulation of chitosan from crabs shell runs more effectively. From jartest, found optimum pH for chitosan from mussels shell is pH 7-9 and from crabs shell is pH 5. In this study, found optimum dose for chitosan from mussels shell at pH 5, 7, and 9 are 200, 350, and 250 mg/l then for crabs shell at pH 5, 7, and 9 are 6, 10, and 14 mg/l.