Every year, massive amounts of shrimp waste is generated as a result of marine food processing for human consumption. Shrimp waste consists of heads, legs, and shells. Without further processing, large quantities of this bio-waste become a severe burden to the environment. The first step in shrimp waste processing is elimination of the exoskeletal protein. To remove the protein, shrimp waste is commonly treated with harsh chemicals. The resulting product is partially purified chitin, a biodegradable polymer, which has been extensively researched for its use in various industrial processes and applications. The chemical method for chitin extraction, however, has various drawbacks due to high alkali effluent streams generated during the waste treatment process. In this research, alternative methods for chitin extraction has been investigated. Biological methods for protein removal consisting of pure culture fermentation with B. subtilis 765 as well as mixed culture anaerobic digestion have been successfully implemented to recover chitin with a protein content less than 10 mg/g. Physical methods for protein removal consisting of thermal treatment and sonicating shrimp waste combined with washing were also implemented to remove a sufficient amount of protein from shrimp waste. Based on the preliminary economic analysis performed, the thermal treatment for protein removal combined with washing appeared to be the safest alternative to the conventional chemical treatment, and the least expensive method for protein removal.
|Commitee:||Bajpai, Rakesh, Hernandez, Rafael, Zappi, Mark|
|School:||University of Louisiana at Lafayette|
|School Location:||United States -- Louisiana|
|Source:||MAI 54/06M(E), Masters Abstracts International|
|Subjects:||Analytical chemistry, Organic chemistry, Chemical engineering|
|Keywords:||Chitin, Protein, Shrimp waste|
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