Asshofi, Dzulfikri and Wicaksono, Favian Bagus (2021) Sintesis Dan Karakterisasi Kitosan Dari Cangkang Rajungan. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Nowadays, crab food consumption in Indonesia is high, making it a waste shredded shell waste that accumulates can damage the environment, Therefore, shredded shell waste must be handled appropriately to avoid this damaging the environment, an alternative for utilizing crab shell waste in order have utility and value by processing waste into this product is wrong except used as chitosan. chitosan itself can be used for antimicrobial, antioxidant, and waste processing. To make chitosan, ingredients.The base contains protein so it can be processed chemically and obtained chitosan. Chopped shells have a protein content of 10%- 44%) so that crab shell waste can be made into chitosan. Process Making chitose itself has 3 processes, namely the first stage deproteination, where at this stage the chopped shells are treated with a solution. NaOH 3N, ratio 1:10 (w/v) was reacted at 90°C for 1 hour, The purpose of this deproteination stage is to eliminate the protein levels in shredded shell material. The next stage is the demineralization stage, where At this stage, after the material is mixed with 1 N HCL acid solution, ratio 1:7 (w/v) reacted at 90°C for 1 hour. Objective This is done to remove the mineral content in the material, the final stage is the deacetylation stage, where at this stage is the process of changing chitin into chitosan by adding NaOH solution. In this research there are independent variables in the addition of NaOH concentration and changes in temperature at the deacetylation stage because this can affect the degree deacetylation, where the greater the degree of deacetylation, the more chitosan optimal for implementation. in this study used independent variables with the addition of NaOH concentrations of 30%, 40%, 50%, 60%, 70%. and temperature of 120°C, 140°C, 160°C with a stirring speed of 400 rpm at the deacetylation. In this research, chitosan was synthesized from crab shells. The optimum degree of deacetylation is 89.06% at a variable NaOH concentration of 50% with a temperature of 140 degrees when stirred using a magnetic stirrer with speed of 400 rpm for 2 hours in the deacetylation process and chitosan has characteristics with a water content of 5.05%; ash content 1.72%; heavy metals ( Pb 0.0009 ppm, Cd 0.0011ppm; Hg 0.0006; Arsenic 0.0051 ppm). The results in this study met chitosan quality standards.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Dzulfikri Asshofi | ||||||||
| Date Deposited: | 22 Sep 2023 08:21 | ||||||||
| Last Modified: | 22 Sep 2023 08:21 | ||||||||
| URI: | http://repository.upnjatim.ac.id/id/eprint/17970 |
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