Cover Image

Lactic Acid Production From Broken Rice Via Fermentation Process

One of the consequences of industrial food production activities is the generation of high volumes of waste, whose disposal can be problematic, since it occupies large spaces and when poorly managed can pose environmental and health risks for the population. The rice industry is an important acti...

Full description

Saved in:
Bibliographic Details
Main Author: Shuhada Baharuddin, Nur
Format: Monograph
Language:English
Published: Pusat Pengajian Teknologi Industri 2020
Subjects:
T1-995 Technology(General)
Online Access:http://eprints.usm.my/46952/1/LACTIC%20ACID%20PRODUCTION%20FROM%20BROKEN%20RICE%20%28ABSTRACT%29.pdf
http://eprints.usm.my/46952/
http://ethesis.usm.my:8080/jspui/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.usm.eprints.46952
record_format eprints
spelling my.usm.eprints.46952 http://eprints.usm.my/46952/ Lactic Acid Production From Broken Rice Via Fermentation Process Shuhada Baharuddin, Nur T1-995 Technology(General) One of the consequences of industrial food production activities is the generation of high volumes of waste, whose disposal can be problematic, since it occupies large spaces and when poorly managed can pose environmental and health risks for the population. The rice industry is an important activity and generates large quantities of waste. The main solid waste generated in the rice production cycle is broken rice. Broken rice refers to the fragments of rice grain obtained by milling and separated after the polishing phase. It has the same chemical composition as white rice and its most important components are carbohydrates. The aim of this research is to investigate the optimum condition and potential of utilizing fermented broken rice to the production of lactic acid using different strain of bacteria culture. Different process parameters such as pH of the medium, temperature, agitation speed and substrate concentration were used to study the optimum condition. Then, the growth kinetics and modelling of lactic acid production from broken rice were studied in a batch system. From the screening process, the highest lactic acid concentration of 5.24 g/L was obtained from Lactobacillus acidophilus strain at pH 7, Temperature 35ºC, 150 rpm agitation speed and the substrate used was 50 g/L. Unstructured models were proposed using the logistic equation for growth, the Luedeking-Piret equation for lactic acid production and modified Leudeking-Piret model for substrate consumption. The parameters estimation for the experiment data for batch fermentation µmax = 0.2582 h-1, XO = 2.281 g/L, Xm = 8.60 g/L, Yx/s = 0.200 g/g, Yp/s = 0.74 g/g and maintenance coefficient (ms) = 0.017 g glucose g−1 biomass h−1. From the Leudeking – Piret equations the α, ß value obtained were 0.179 and 0.014 respectively. Excellent significant R2 values of 0.8452, 0.9245, and 0.9669 were observed for biomass, lactic acid production and substrate consumption, respectively. The values indicated that the model used was able to interpret the fermentation kinetic in the batch fermentation. The feasibility study shown broken rice having high potential to be a new sustainable source for the lactic acid production. Pusat Pengajian Teknologi Industri 2020-06 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/46952/1/LACTIC%20ACID%20PRODUCTION%20FROM%20BROKEN%20RICE%20%28ABSTRACT%29.pdf Shuhada Baharuddin, Nur (2020) Lactic Acid Production From Broken Rice Via Fermentation Process. Project Report. Pusat Pengajian Teknologi Industri. (Submitted) http://ethesis.usm.my:8080/jspui/
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic T1-995 Technology(General)
spellingShingle T1-995 Technology(General)
Shuhada Baharuddin, Nur
Lactic Acid Production From Broken Rice Via Fermentation Process
description One of the consequences of industrial food production activities is the generation of high volumes of waste, whose disposal can be problematic, since it occupies large spaces and when poorly managed can pose environmental and health risks for the population. The rice industry is an important activity and generates large quantities of waste. The main solid waste generated in the rice production cycle is broken rice. Broken rice refers to the fragments of rice grain obtained by milling and separated after the polishing phase. It has the same chemical composition as white rice and its most important components are carbohydrates. The aim of this research is to investigate the optimum condition and potential of utilizing fermented broken rice to the production of lactic acid using different strain of bacteria culture. Different process parameters such as pH of the medium, temperature, agitation speed and substrate concentration were used to study the optimum condition. Then, the growth kinetics and modelling of lactic acid production from broken rice were studied in a batch system. From the screening process, the highest lactic acid concentration of 5.24 g/L was obtained from Lactobacillus acidophilus strain at pH 7, Temperature 35ºC, 150 rpm agitation speed and the substrate used was 50 g/L. Unstructured models were proposed using the logistic equation for growth, the Luedeking-Piret equation for lactic acid production and modified Leudeking-Piret model for substrate consumption. The parameters estimation for the experiment data for batch fermentation µmax = 0.2582 h-1, XO = 2.281 g/L, Xm = 8.60 g/L, Yx/s = 0.200 g/g, Yp/s = 0.74 g/g and maintenance coefficient (ms) = 0.017 g glucose g−1 biomass h−1. From the Leudeking – Piret equations the α, ß value obtained were 0.179 and 0.014 respectively. Excellent significant R2 values of 0.8452, 0.9245, and 0.9669 were observed for biomass, lactic acid production and substrate consumption, respectively. The values indicated that the model used was able to interpret the fermentation kinetic in the batch fermentation. The feasibility study shown broken rice having high potential to be a new sustainable source for the lactic acid production.
format Monograph
author Shuhada Baharuddin, Nur
author_facet Shuhada Baharuddin, Nur
author_sort Shuhada Baharuddin, Nur
title Lactic Acid Production From Broken Rice Via Fermentation Process
title_short Lactic Acid Production From Broken Rice Via Fermentation Process
title_full Lactic Acid Production From Broken Rice Via Fermentation Process
title_fullStr Lactic Acid Production From Broken Rice Via Fermentation Process
title_full_unstemmed Lactic Acid Production From Broken Rice Via Fermentation Process
title_sort lactic acid production from broken rice via fermentation process
publisher Pusat Pengajian Teknologi Industri
publishDate 2020
url http://eprints.usm.my/46952/1/LACTIC%20ACID%20PRODUCTION%20FROM%20BROKEN%20RICE%20%28ABSTRACT%29.pdf
http://eprints.usm.my/46952/
http://ethesis.usm.my:8080/jspui/
_version_ 1677782006757326848
score 13.211869

Similar Items