Home About us MoEF Contact us Sitemap Tamil Website  
About Envis
Whats New
Microorganisms
Research on Microbes
Database
Bibliography
Publications
Library
E-Resources
Microbiology Experts
Events
Online Submission
Access Statistics

Site Visitors

blog tracking


 
Bioresource Technology
Vol.1
01, No.3 , 2010; Pages: 6345-53

Utilization of wastewater originated from naturally fermented virgin coconut oil manufacturing process for bioextract production: physico-chemical and microbial evolution

Sudarut Tripetchkul; Sasithorn Kusuwanwichid; Songpon Koonsrisuk; Saengchai Akeprathumchai

School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, ThaKham, BangKhuntien, Thailand.

Abstract

Production of virgin coconut oil via natural fermentation has led to large amount of wastes being generated, i.e., coconut pulp and wastewater containing coconut crème. Objective of this study is to gain more insight into the feasibility of utilization of such wastes as raw materials together with several types of wastes such as fish waste and/or pineapple peel for bioextract production. Chemical, physico-chemical and biological changes including phytotoxicity of the fermented mixture were closely monitored. Physical observation suggested that fermentation of bioextract obtained with fish waste appeared to be complete within the first month of fermentation while bioextract obtained using pineapple waste seemed to be complete after 8 months post-fermentation. Fermentation broth is of blackish color with alcoholic as well as acidic odour with no gas bubble and/or yeast film present on top of the surface. During the whole fermentation interval, several attributes of both bioextracts, e.g., pH, chemical oxygen demand (COD) and organic acids, were statistically different. Further, the total bacteria and lactic acid bacteria present in pineapple bioextract were statistically higher than those of the fish bioextract (p < 0.01). The highest germination indices of 123 and 106 were obtained at 21 and 14 days post-fermentation for fish and pineapple bioextracts, respectively. In addition, qualities of both bioextracts conformed well with those specified by the Thai standard for liquid biofertilizer after 1 month fermentation. Results further showed that wastewater derived from virgin coconut oil manufacturing process could effectively be employed together with other types of wastes such as fish waste and pineapple peel for bioextract production. However, for the best bioextract quality, fermentation should be carefully planned since over fermentation led to bioextract of low qualities.

Keywords:Production of virgin coconut oil,Chemical, physico-chemical and biological changes including phytotoxicity of the fermented mixture were closely monitored.


 

 
Copyright © 2005 ENVIS Centre ! All rights reserved
This site is optimized for 1024 x 768 screen resolution