Characterization of chitosan extracted from shrimp shell waste and its utilization as a flocculant for harvesting of microalgae

Md Bashirul Islam, Md Khalekuzzaman, Sadib Bin Kabir, Md Refat Hossain

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

Shrimp shell waste generated from shrimp processing industries is one of the leading issues contributing to environmental pollution and health hazards. The common practice for its management is disposal or burning of the waste, which is not environmentally safe due to the shells' low degradability or burning capability. In this situation, transforming the waste into a valuable product named Chitosan for application in different areas could be an effective solution for waste remediation. This study extracts Chitosan from shrimp shell waste by demineralization, deproteination, and deacetylation processes. The extracted product was characterized by different analyses such as chitosan yield, bulk density, solubility, degree of deacetylation, water binding capacity, fat binding capacity, surface morphology, and FTIR spectroscopy. The results showed that chitosan yield, bulk density, solubility, degree of deacetylation, water binding capacity, fat binding capacity were 29%, 0.27 g/cm3, 97%, 58%, 533%, 459%, respectively. Surface morphology and FTIR spectroscopy suggested that Chitosan had good adsorption capacity, making them an effective flocculant for harvesting microalgae. Microalgae harvesting was done at a mixing rate of 120 rpm, 80 rpm, and 40 rpm, respectively, with two-dose (e.g., 20 mg/L and 60 mg/L) and a single mixing time (5 min). About 100% harvesting efficiency was found at a dose of 20 mg/L with a mixing rate of 120 rpm. Hence, this study offers a waste remediation technique to manage and utilize shrimp waste to prevent deterioration of the environment and human health.

Original languageEnglish
Title of host publication6th International Conference on Civil Engineering for Sustainable Development, ICCESD 2022
EditorsMd. Shahjahan Ali, Kazi A.B.M. Mohiuddin, Md. Rafizul Islam, Mehedi Hasan
PublisherAmerican Institute of Physics
ISBN (Electronic)9780735444454
DOIs
Publication statusPublished - 28 Apr 2023
Externally publishedYes
EventInternational Conference on Civil Engineering for Sustainable Development 2022 - Khulna, Bangladesh
Duration: 10 Feb 202212 Feb 2022
Conference number: 6th

Publication series

NameAIP Conference Proceedings
Volume2713
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Conference on Civil Engineering for Sustainable Development 2022
Abbreviated titleICCESD 2022
Country/TerritoryBangladesh
CityKhulna
Period10/02/2212/02/22

Cite this