Statistical optimization studies for polyhydroxybutyrate (PHB) production by novel Bacillus subtilis using agricultural and industrial wastes

2018 ◽  
Vol 16 (7) ◽  
pp. 3497-3512 ◽  
Author(s):  
M. A. Hassan ◽  
E. K. Bakhiet ◽  
H. R. Hussein ◽  
S. G. Ali
Keyword(s):  
Bacillus Subtilis ◽  
Statistical Optimization ◽  
Industrial Wastes ◽  
Phb Production

scholarly journals Statistical optimization of antifungal iturin A production from Bacillus amyloliquefaciens RHNK22 using agro-industrial wastes

2017 ◽  
Vol 24 (7) ◽  
pp. 1722-1740 ◽  
Author(s):  
P. Narendra Kumar ◽  
T.H. Swapna ◽  
Mohamed Yahya Khan ◽  
Gopal Reddy ◽  
Bee Hameeda
Keyword(s):  
Bacillus Amyloliquefaciens ◽  
Statistical Optimization ◽  
Industrial Wastes ◽  
Iturin A

scholarly journals Reliability of Unconventional Concrete: Improvement in Mix Design and Addition of Bacterial Admixture

2021 ◽  
Vol 9 (11) ◽  
pp. 136-149
Author(s):  
Burhan Afzal
Keyword(s):  
Carbon Dioxide ◽  
Compressive Strength ◽  
Bacillus Subtilis ◽  
Silica Fume ◽  
Carbon Dioxide Emissions ◽  
Substantial Reduction ◽  
Bacillus Sphaericus ◽  
Industrial Wastes ◽  
Engineering Properties ◽  
Environmental Damage

Abstract: Portland cement is used by the construction industries, which is known to be a heavy contributor of carbon dioxide emissions and environmental damage. Adding of industrial wastes like demolished old concrete OF structures, silica fume (SF) fly ash (FA) as additional cementing materials (SCMs) could result in a substantial reduction of the overall Carbon dioxide trace marks of the final concrete product. Use of these additional materials in construction industry especially in the making of concrete is highly challenging. Remarkable research efforts are needed to study about the engineering properties of concrete incorporating such industrial wastes. Present research is an effort to study the properties of concrete adding industrial wastes such as demolished concrete, FA and SF The improvement of properties of RCA concrete with the incorporation of two ureolytic-type bacteria, Bacillus subtilis and Bacillus sphaericus to improve the properties of RCA concrete. The experimental investigations are carried out by experts evaluate the improvement of the compressive strength, capillary water absorption and drying shrinkage of RCA concrete adding bacteria. Seven concrete mixes are manufactured using Portland slag cement (PSC) partially changed with SF ranging from 0 to 30%. The mix proportions were obtained as per Indian standard IS: 10262-2009 with 10% extra cement when SF is taken as per the above the construction practice by experts. Optimal dosages of SF for maximum values of compressive strength, tensile splitting strength and flexural strength at 28 days are determined. Keywords: Bacillus subtilis, Bacillus sphaericus, RCA, PSC, Silica Fume.

Kinetic modeling of biosurfactant production by Bacillus subtilis N3-1P using brewery waste

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Bahareh Moshtagh ◽  
Kelly Hawboldt ◽  
Baiyu Zhang
Keyword(s):  
Bacillus Subtilis ◽  
Large Scale ◽  
Scale Up ◽  
Substrate Utilization ◽  
Batch Cultivation ◽  
Biosurfactant Production ◽  
Industrial Wastes ◽  
Biomass Growth ◽  
Cultural Conditions ◽  
Specific Growth Rates

Abstract Costs associated with production of favorable biologically produced surfactants continue to be a significant obstacle to large scale application. Using industrial wastes and by-products as substrate and optimization of cultural conditions are two strategies of producing biosurfactants with a reasonable price. Also, modeling the biosurfactant production bioprocess improves the commercial design and monitoring of biomass growth, biosurfactant production, and substrate utilization. In this study, the indigenous Bacillus subtilis N3-1P strain and a local brewery waste as the carbon source were used to produce a biosurfactant. The batch cultivation was performed under the optimum conditions. Models describing the biomass growth, biosurfactant production, and substrate utilization were developed by fitting the experimental data to the logistic, Contois and Luedeking-Piret models using MATLAB software and regression analysis. The kinetic parameters including the maximum specific growth rates (µ max), the Contois constant (K), parameters of the Luedeking-Piret modelswere calculated. Yields including Y X/S , and Y P/X were found to be 0.143 gX/gS, and 0.188 gP/gX, respectively. The experimental and predicted model showed good agreement. The developed models are a key step in designing reactors for scale up of biosurfactant production.

Statistical optimization of PolyHydroxy Butyrate (PHB) production by novel Acinetobacter nosocomialis RR20 strain using Response Surface Methodology

2020 ◽  
Vol 14 (1) ◽  
pp. 62-69
Author(s):  
Ranganadha Reddy ◽  
Vidya Prabhakar ◽  
Venkateswarulu Venkateswarulu TC ◽  
Krupanidhi Krupanidhi S ◽  
Md. Nazneen Bobby ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Statistical Optimization ◽  
Phb Production ◽  
Polyhydroxy Butyrate
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