Production of chitosan from shrimp shell wastes and its potential use as flocculant for wastewater treatment

Date

4-1998

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Veronica P. Migo

Abstract

The optimum conditions for chitosan production from shrimp shells were determined. Demineralization was done by soaking the shells in 15% HCI (1:6 w/v) for two days. For deproteination, the optimum conditions were 1% NaOH at 65 ° C for 5 hours. Deacetylation using 60% NaOH under pressure at 121°C for thirty minutes yielded the partially deacetylated chitosan. The chemical characteristics of the product obtained are comparable with the commercial grade chitosan in terms of ash, nitrogen, intrinsic viscosity and molecular weight. The chitosan was evaluated as a flocculent in removing the color of pulp mill effluent. The optimum concentration of chitosan was 1 mg per ml of effluent corresponding to 98% decolorization. The sludge formed after flocculation was 5% (w/v) and the pH of the final effluent was 6.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1998 C4 M66

Document Type

Thesis

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