Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion

Citric acid was produced by Aspergillus niger A-SS106 isolated from local sources utilizing sewage treatment plant (STP) sludge as substrate in laboratory scale process. Central composite design (CCD) was carried out to identify the total experiments for optimization of process conditions for citric...

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Main Authors:	Alam, Md. Zahangir, Jamal, Parveen, Saari, Rosnani
Format:	Conference or Workshop Item
Language:	English
Published:	2006
Subjects:	TP Chemical technology TP248.13 Biotechnology
Online Access:	http://irep.iium.edu.my/5846/ http://irep.iium.edu.my/5846/1/Full-text_UTM.pdf

id	iium-5846
recordtype	eprints
spelling	iium-58462011-11-21T22:46:46Z http://irep.iium.edu.my/5846/ Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion Alam, Md. Zahangir Jamal, Parveen Saari, Rosnani TP Chemical technology TP248.13 Biotechnology Citric acid was produced by Aspergillus niger A-SS106 isolated from local sources utilizing sewage treatment plant (STP) sludge as substrate in laboratory scale process. Central composite design (CCD) was carried out to identify the total experiments for optimization of process conditions for citric acid production. The variables involved in the study were temperature, agitation rate, initial pH and inoculum size. A polynomial model was developed using the experimental data for determining the optimum process conditions through response surface methodology with respect to citric acid production. Statistical analysis of results showed the optimized values were: temperature of 30 ºC, agitation rate of 350 rpm, initial pH of 4 and inoculum size of 2%. Under the optimum conditions obtained from model equation, the predicted citric acid was 1.51 g/l produced on day 4. The maximum citric acid was 2.9 g/l obtained on day 2 under the optimum conditions. 2006 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/5846/1/Full-text_UTM.pdf Alam, Md. Zahangir and Jamal, Parveen and Saari, Rosnani (2006) Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion. In: Regional Postgraduate Conference on Science and Engineering, 27-28 July, 2006, UTM, Malaysia.
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TP Chemical technology TP248.13 Biotechnology
spellingShingle	TP Chemical technology TP248.13 Biotechnology Alam, Md. Zahangir Jamal, Parveen Saari, Rosnani Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion
description	Citric acid was produced by Aspergillus niger A-SS106 isolated from local sources utilizing sewage treatment plant (STP) sludge as substrate in laboratory scale process. Central composite design (CCD) was carried out to identify the total experiments for optimization of process conditions for citric acid production. The variables involved in the study were temperature, agitation rate, initial pH and inoculum size. A polynomial model was developed using the experimental data for determining the optimum process conditions through response surface methodology with respect to citric acid production. Statistical analysis of results showed the optimized values were: temperature of 30 ºC, agitation rate of 350 rpm, initial pH of 4 and inoculum size of 2%. Under the optimum conditions obtained from model equation, the predicted citric acid was 1.51 g/l produced on day 4. The maximum citric acid was 2.9 g/l obtained on day 2 under the optimum conditions.
format	Conference or Workshop Item
author	Alam, Md. Zahangir Jamal, Parveen Saari, Rosnani
author_facet	Alam, Md. Zahangir Jamal, Parveen Saari, Rosnani
author_sort	Alam, Md. Zahangir
title	Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion
title_short	Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion
title_full	Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion
title_fullStr	Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion
title_full_unstemmed	Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion
title_sort	optimization of process conditions for citric acid production utilizing stp sludge as substrate by liquid state bioconversion
publishDate	2006
url	http://irep.iium.edu.my/5846/ http://irep.iium.edu.my/5846/1/Full-text_UTM.pdf
first_indexed	2023-09-18T20:14:38Z
last_indexed	2023-09-18T20:14:38Z
_version_	1777407705008308224

Optimization of process conditions for citric acid production utilizing STP sludge as substrate by liquid state bioconversion

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