Optimization of lactic acid production from Jatropha curcas L. meal using Lactobacillus acidophilus.

Date

4-2009

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Jovita L. Demafelis

Co-adviser

Laura J. Pham

Committee Member

Butch G. Bataller, Jovita L. Movillon

Abstract

Production of lactic acid from Jatropha curcas L. meal using Lactobacillus acidophilus was studied. Twelve fermentation runs were conducted at different experimental conditions with temperature (32, 37, 42°C), pH (5, 6, 7) and agitation rate (200, 300 400rpm) as parameters under investigation. Sampling for each run was done every six hours for twenty-four hours. Experimental results show that the highest lactic acid concentration (0.2344g/L) was achieved at 32°C, pH7 and 200rpm. From the response surface analysis the predicted maximum lactic acid concentration (0.2438g/L) that can be produced will be obtained at a temperature of 32°C, and 300rpm. Statistical analysis showed that none of the parameters under study has a significant effect on the production of lactic acid.

Language

English

LC Subject

Mathematical optimization, Jatropha, Lactic acid bacteria, Biodiesel, Lactobacillus

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

LG 993.5 2009 E62 G33

Document Type

Thesis

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