Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi

The production of cellulases from rice straw (RS) by four fungi: Trichoderma harzianum (SCahmT105), Trichoderma spp.(1) (STP101), Trichoderma spp.(3) (STP103) and Phanerochaete chrysosporium was investigated. The microbial treatment using solid state fermentation was conducted in 250 ml Erlenmeyer f...

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Main Author:	Hayet Khan, Md. Munir
Format:	Thesis
Language:	English English
Published:	2007
Subjects:	Fermentation - Malaysia
Online Access:	http://psasir.upm.edu.my/id/eprint/5241/1/FK_2007_42.pdf
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id	my-upm-ir.5241
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spelling	my-upm-ir.52412013-05-27T07:21:24Z Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi 2007 Hayet Khan, Md. Munir The production of cellulases from rice straw (RS) by four fungi: Trichoderma harzianum (SCahmT105), Trichoderma spp.(1) (STP101), Trichoderma spp.(3) (STP103) and Phanerochaete chrysosporium was investigated. The microbial treatment using solid state fermentation was conducted in 250 ml Erlenmeyer flasks considering rice straw as a major solid substrate. The highest cellulase activities such as 25.53 U/g of rice straw due to filter paper activity and 42.86 U/g of rice straw due to carboxymethyl cellulose activity were obtained at day 4 of cultivation using Phanerochaete chrysosporium for the purpose of selecting the best fungus among these four strains. Glucosamine for growth and reducing sugar as substrate utilization indicator were observed to evaluate the fermentation of rice straw in the experiment and pH values were recorded as well. Four process parameters of the solid state fermentation namely moisture content, mineral content, co-substratre and inoculum size with three levels of each parameter were used to optimize the production of cellulases by Plackett-Burman technique under factorial design. The results for first phase of optimization showed that the production of cellulases were higher i.e. 26.43 U/g of rice straw due to filter paper of activity and 46.25 U/g of rice straw due to carboxymethyl cellulose activity compared to the production obtained during the earlier study of selecting best strain among four fungi but the optimum regions of the surfaces was not found. Second phase of optimization was conducted to determine the actual optimum conditions within the ranges of variables tested. The experimental data were used to develop second order polynomial models considering linear, quadratic and interaction effects of the variables (factors). The optimum values obtained at second phase of optimization for moisture content, inoculum size, co-substrate and mineral content were 50% (v/w), 10% (v/w), 1% (w/w) and 5% (v/w) respectively. Using the final model equations the process factors/variables were tested by increasing or decreasing the values within the ranges of parameters tested and optimum production of cellulases were obtained to be 30.18 U/g of rice straw (FPU) and 53.93 U/g of rice straw (CMCase) for Phanerochaete chrysosporium with the optimum process conditions. A final experiment with these optimum process parameters of SSF was conducted to evaluate the production of cellulases as well as the validation of the models which indicated the production of 29.46 U/g of rice straw due to filter paper activity and 54.83 U/g of rice straw due to carboxymethyl cellulose activity in the laboratory which approved the optimum production obtained with 2.4% and 1.6% error, respectively. Fermentation - Malaysia 2007 Thesis http://psasir.upm.edu.my/id/eprint/5241/ http://psasir.upm.edu.my/id/eprint/5241/1/FK_2007_42.pdf application/pdf en public masters Universiti Putra Malaysia Fermentation - Malaysia Faculty of Engineering English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Fermentation - Malaysia
spellingShingle	Fermentation - Malaysia Hayet Khan, Md. Munir Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi
description	The production of cellulases from rice straw (RS) by four fungi: Trichoderma harzianum (SCahmT105), Trichoderma spp.(1) (STP101), Trichoderma spp.(3) (STP103) and Phanerochaete chrysosporium was investigated. The microbial treatment using solid state fermentation was conducted in 250 ml Erlenmeyer flasks considering rice straw as a major solid substrate. The highest cellulase activities such as 25.53 U/g of rice straw due to filter paper activity and 42.86 U/g of rice straw due to carboxymethyl cellulose activity were obtained at day 4 of cultivation using Phanerochaete chrysosporium for the purpose of selecting the best fungus among these four strains. Glucosamine for growth and reducing sugar as substrate utilization indicator were observed to evaluate the fermentation of rice straw in the experiment and pH values were recorded as well. Four process parameters of the solid state fermentation namely moisture content, mineral content, co-substratre and inoculum size with three levels of each parameter were used to optimize the production of cellulases by Plackett-Burman technique under factorial design. The results for first phase of optimization showed that the production of cellulases were higher i.e. 26.43 U/g of rice straw due to filter paper of activity and 46.25 U/g of rice straw due to carboxymethyl cellulose activity compared to the production obtained during the earlier study of selecting best strain among four fungi but the optimum regions of the surfaces was not found. Second phase of optimization was conducted to determine the actual optimum conditions within the ranges of variables tested. The experimental data were used to develop second order polynomial models considering linear, quadratic and interaction effects of the variables (factors). The optimum values obtained at second phase of optimization for moisture content, inoculum size, co-substrate and mineral content were 50% (v/w), 10% (v/w), 1% (w/w) and 5% (v/w) respectively. Using the final model equations the process factors/variables were tested by increasing or decreasing the values within the ranges of parameters tested and optimum production of cellulases were obtained to be 30.18 U/g of rice straw (FPU) and 53.93 U/g of rice straw (CMCase) for Phanerochaete chrysosporium with the optimum process conditions. A final experiment with these optimum process parameters of SSF was conducted to evaluate the production of cellulases as well as the validation of the models which indicated the production of 29.46 U/g of rice straw due to filter paper activity and 54.83 U/g of rice straw due to carboxymethyl cellulose activity in the laboratory which approved the optimum production obtained with 2.4% and 1.6% error, respectively.
format	Thesis
qualification_level	Master's degree
author	Hayet Khan, Md. Munir
author_facet	Hayet Khan, Md. Munir
author_sort	Hayet Khan, Md. Munir
title	Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi
title_short	Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi
title_full	Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi
title_fullStr	Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi
title_full_unstemmed	Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi
title_sort	solid state fermentation of rice straw for production of cellulases by selected fungi
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Engineering
publishDate	2007
url	http://psasir.upm.edu.my/id/eprint/5241/1/FK_2007_42.pdf
_version_	1747810381702627328

Solid State Fermentation Of Rice Straw For Production Of Cellulases By Selected Fungi

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