STUDI POTENSI PENGGUNAAN KITOSAN CANGKANG KERANG HIJAU DAN KITOSAN KEPITING HASIL MODIFIKASI SECARA MIKROBA SEBAGAI KOAGULAN ALTERNATIF

• Main Author: Nur Pratama, Aldie
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/35547
• Institution: Institut Teknologi Bandung

Provision for suspended substances is one very important aspect in sewage treatment and drinking water treatment. Suspended substances composed of organic, inorganic, and heavy metals. Coagulation / flocculation is a process of elimination suspended substances which aims to eliminate turbidity in the form of suspended and colloidal material. This process is done by adding a material called coagulant into the treatment process. Aluminum and PAC is a chemical that is often used as a coagulant. The use of alum as a coagulant and PAC raises concerns because of the resulting inorganic residues are carcinogenic. Chitosan can be used as an alternative coagulant because the content of the chitosan amino allows coagulant used as a water purifier. Chitosan (C6H11NO4)n is derived from the deacetylation of chitin, a second largest polysaccharide after cellulose. One source of chitin derived from the exoskeletons of Crustaceae, including shrimp, clams, and crabs. This study focuses on the use of mussel’s shell chitosan with enzymatic modification as a coagulant. Effectiveness of coagulation was done by jar test. Mussel chitosan dissolved in 1% acetic acid to obtain 10 mg of chitosan in 1 mL solution. Jartest performed with three variations of pH: 5, 7, and 9. As a comparison, another coagulants were done with the same method: aluminum sulfate, PAC, and crab chitosan. Parameters observed in this study are turbidity, organic matter, and iron. The optimum pH of green mussel chitosan was at pH 9. Conditions of optimum dosage of chitosan mussels at pH 5, 7, and 9 is 200 mg / L. At the optimum dose, the removal efficiency for green shells chitosan coagulant at pH 5 for the parameters of turbidity, organic matter, and iron are respectively 96.87%, 82.74%, 91.67%. Whereas at pH 7 was 96.09%, 92.49%, 96.93%. And at pH 9 was 97.62%, 98.4%, 96.37%. Mussels’s shell chitosan with enzymatic modification has potential to be used as a coagulant, but judging from the high dose requirement, it less efficient for this chitosan to be used as an alternative coagulant. However, further research needs to be done to find an effective modification of chitosan in terms of dose to be used as an alternative coagulant.