Response Surface Methodology Based Nickel Bioremoval by Penicillium citrinum Grown in Dilute Acid Pretreated Lignocellulosic Material

Response surface methodology was used to study the effects of parameters namely, time, temperature, and solid content and to optimize the process conditions for the minimum energy consumption in dilute acid pretreatment. Box-Behnken design using response surface methodology was employed. Effects of time and temperature are significant at the significant level of α = 0.05. Longer time and higher temperature result in higher power energy consumption. The best optimal values of the process conditions are time 14–21 min and temperature 129–139 °C.

Download Full-text

Optimizing the tray dryer temperature and time of white corn flour culture

Food Research ◽

10.26656/fr.2017.5(5).718 ◽

2021 ◽

Vol 5 (5) ◽

pp. 95-104

Author(s):

D. Hunaefi ◽

Rahmawati R. ◽

D. Saputra ◽

R.R. Maulani ◽

T. Muhandri

Keyword(s):

Response Surface Methodology ◽

Aspergillus Niger ◽

Water Content ◽

Response Surface ◽

Water Activity ◽

Penicillium Citrinum ◽

Drying Process ◽

Corn Flour ◽

Acremonium Strictum ◽

Candida Famata

This research aimed to optimize the tray dryer temperature and time of white corn flour culture by Response Surface Methodology (RSM). There were two cultures used in this research, namely Amylolytic Culture (AC) and Complete Culture (CC). AC consisted of Penicillium citrinum, Aspergillus niger, Acremonium strictum, and Candida famata, while CC consisted of Penicillium chrysogenum, Penicillium citrinum, Aspergillus niger, Rhizopus stolonifer, Rhizopus oryzae, Fusarium oxysporum, Acremonium strictum, Candida famata, Kodamaea ohmeri and Candida krusei/incospicua. The independent variables in this study were drying temperature and time, where the quality indicators used were total viability of mold and yeast, water content, water activity, and pH. This research used a factor response surface methodology. Data were analyzed by ANOVA with an α level of 95%. The result of this research showed that the optimum drying process for AC starter was 40°C for 10 hrs, with characteristic response viability 8.8×107 CFU/g, water activity 0.43, water content 8.90%, and pH 4.05. CC starter showed an optimum drying process at 49°C for 4.5 hrs, with characteristic response viability 4.9×107 CFU/g, water activity 0.49, water content 7.02%, and pH 3.95. The optimum tray dryer temperatures and times were achieved for AC and CC starters.

Download Full-text

Optimization of Cellulase Production by Aspergillus niger ITBCC L74 with Bagasse as Substrate using Response Surface Methodology

HAYATI Journal of Biosciences ◽

10.4308/hjb.25.3.115 ◽

2018 ◽

Vol 25 (3) ◽

pp. 115

Author(s):

Abdullah Abdullah ◽

Hamid Hamid ◽

Marcelinus Christwardana ◽

H. Hadiyanto

Keyword(s):

Response Surface Methodology ◽

Aspergillus Niger ◽

Response Surface ◽

Cellulase Activity ◽

Cellulase Production ◽

Lignocellulosic Material ◽

Huge Amount ◽

Activity Effect ◽

Mgcl2 Concentration ◽

Important Enzyme

Cellulase is a very important enzyme for lignocelluloses based ethanol production. Bagasse contains mainly cellulose (57.76%), hemicellulose (12.44%), lignin (21.34%), and others (7.96%). Lignocellulosic material has been considered as the good option for cellulase production because it is cheap and already available in a huge amount. The objective of this research was to produce cellulase enzyme and to optimize it by using response surface methodology. The bagasse with water content of 80% was incubated with 2 ml inoculum of Aspergillus niger ITBCC L74 in a 250 ml Erlenmeyer flask. After reaching the specified time the enzyme was extracted and then determined for its activity. Effect of process parameters such as pH, urea and MgCl2 addition were studied. The optimal cellulase activity was achieved at urea concentration of 4.5% (w/w), MgCl2 concentration of 1 mM and pH of 3.5, with maximum enzyme activity was 0.630 U/gr.

Download Full-text

Statistical optimization of dilute acid pretreatment of lignocellulosic biomass by response surface methodology to obtain fermentable sugars for bioethanol production

International Journal of Energy Research ◽

10.1002/er.6423 ◽

2021 ◽

Author(s):

Oznur Yildirim ◽

Bestami Ozkaya ◽

Mahmut Altinbas ◽

Ahmet Demir

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Lignocellulosic Biomass ◽

Statistical Optimization ◽

Dilute Acid Pretreatment ◽

Fermentable Sugars ◽

Bioethanol Production ◽

Dilute Acid ◽

Acid Pretreatment

Download Full-text

Model study on dilute acid pretreatment of argan pulp for bioethanol production using response surface methodology

Mediterranean Journal of Chemistry ◽

10.13171/mjc841906025fzz ◽

2019 ◽

Vol 8 (4) ◽

pp. 290-301

Author(s):

Fatima Zahra Zouhair ◽

Younes En-Nahli ◽

Mohammed Rachid Kabbour ◽

Fatima Ebich ◽

Aouatif Benali ◽

...

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Reducing Sugars ◽

Dilute Acid Pretreatment ◽

Bioethanol Production ◽

Dilute Acid ◽

Operational Parameters ◽

Acid Pretreatment ◽

Model Study ◽

Acid Type

The present work describes comparative dilute acid pretreatment of the argan pulp (residue produced during the argan oil extraction) used as an economical source for bioethanol production. Response surface methodology was used to optimize the pretreatment process and to explore the effect of operational parameters (acid concentration, temperature, time and biomass loading), depending on the acid type (HCl, H2SO4) and pretreatment approach, on total and reducing sugars recovery, in addition to phenolic compounds rate as inhibitors produced during pretreatment process. Experimental results predict an optimal yield of total and reducing sugars of 171.46 mg/ml and 54.83 mg/ml, respectively, were achieved at an optimized time of 30 min with 7% of sulfuric acid at 160°C using 40 % for biomass loading.

Download Full-text