Economic benefit from the optimization of citric acid production from rice straw through Plackett-Burman design and central composite design

Authors : Hayder Khaleel Qurban ALI, Mohamed Zulkali Mohamed DAUD

Pages : 81-93

Doi:10.3906/kim-1111-4

View : 10 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :An economic study was carried out to show the benefits of optimization during the production of citric acid from rice straw as a substrate by solid-state fermentation insert ignore into journalissuearticles values(SSF); using Aspergillus niger}. The optimization procedure for the media components insert ignore into journalissuearticles values(NH4NO3, KH2PO4, MgSO4, CuSO4, ZnSO4, FeSO4, and MnSO4); was carried out using Plackett-Burman design insert ignore into journalissuearticles values(PBD); for the screening and central composite design insert ignore into journalissuearticles values(CCD); for the optimization. The results obtained from PBD indicated that NH4NO3, KH2PO4, and MgSO4 were the most significant components that affected the citric acid production. The maximum yield obtained by CCD was 50.23 g citric acid/kg rice straw. The rate of citric acid production by SSF after the optimization indicated a profit of about 65% for SSF without any nutrient addition and of about 27% for SSF without optimization.
Keywords : Citric acid, solid state fermentation, rice straw, Plackett Burman design, central composite design