Valorization of Zymomonas mobilis for bioethanol production from potato peel: fermentation process optimization

Mazaheri, Davood; Pirouzi, Ali

doi:10.1007/s13399-020-00834-7

Cited by 11 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The selected bacterial isolates produced maximum ethanol on day 7–8 using CMC. The findings are comparable with the data obtained by Mazaheri and Pirouzi . The isolated microbes may tolerate the ethanol contents and ferment the sugars.…”

Section: Discussionsupporting

confidence: 90%

See 1 more Smart Citation

Cellulolytic and Ethanologenic Evaluation of Heterotermes indicola’s Gut-Associated Bacterial Isolates

Azhar,

Aihetasham,

Chaudhary

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Cellulose is the basic component of lignocellulosic biomass (LCB) making it a suitable substrate for bioethanol fermentation. Cellulolytic and ethanologenic bacteria possess cellulases that convert cellulose to glucose, which in turn yields ethanol subsequently. Heterotermes indicola is a subterranean termite that causes destructive damage by consuming wooden structures of infrastructure, LCB products, etc. Prospectively, the study envisioned the screening of cellulolytic and ethanologenic bacteria from the termite gut. Twenty six bacterial strains (H1− H26) based on varied colonial morphologies were isolated. Bacterial cellulolytic activity was tested biochemically. Marked gas production in the form of bubbles (0.1−4 cm) in Durham tubes was observed in H3, H7, H13, H15, H17, H21, and H22. Sugar degradation of all isolates was indicated by pink to maroon color development with the tetrazolium salt. Hallow zones (0.42−11 mm) by Congo red staining was exhibited by all strains except H2, H7, H8, and H19. Among the 26 bacterial isolates, 12 strains were identified as efficient cellulolytic bacteria. CMCase activity and ethanol titer of all isolates varied from 1.30 ± 0.03 (H13) to 1.83 ± 0.01 (H21) umol/mL/min and 2.36 ± 0.01 (H25) to 7.00 ± 0.01 (H21) g/L, respectively. Likewise, isolate H21 exhibited an ethanol yield of 0.40 ± 0.10 g/g with 78.38 ± 2.05% fermentation efficiency. Molecular characterization of four strains, Staphylococcus sp. H13, Acinetobacter baumanni H17, Acinetobacter sp. H21, and Acinetobacter nosocomialis H22, were based on the maximum cellulolytic index and the ethanol yield. H. indicola harbor promising and novel bacteria with a natural cellulolytic tendency for efficient bioconversion of LCB to value-added products. Hence, the selected cellulolytic bacteria can become an excellent addition for use in enzyme purification, composting, and production of biofuel at large.

show abstract

Section: Discussionsupporting

confidence: 90%

“…The findings are comparable with the data obtained by Mazaheri and Pirouzi. 115 The isolated microbes may tolerate the ethanol contents and ferment the sugars.…”

Section: Discussionmentioning

confidence: 99%

Cellulolytic and Ethanologenic Evaluation of Heterotermes indicola’s Gut-Associated Bacterial Isolates

Azhar,

Aihetasham,

Chaudhary

et al. 2024

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Current efforts to make the Z. mobilis process for biosprit production competitive on industrial scale focus on closing metabolic bottle necks associated to sensitivity against osmotic pressure, product concentration, and elevated temperature [23]. Moreover, efforts are dedicated to open the substrate spectrum of Z. mobilis to other inexpensive carbohydrates like dairy whey lactose [24], sugar cane molasses [25], soybean molasses [26], cellulose [27], starch [28], or pentoses [29]; these processes often resort to tools of genetic engineering.…”

Section: 32) Bioethanol By Facultatively Anaerobic Bacteriamentioning

confidence: 99%

Biotechnological Approaches to Generate Biogenic Solvents and Energy Carriers from Renewable Resources

Koller

2023

The EuroBiotech Journal

View full text Add to dashboard Cite

Background: Current threats connected to the ongoing depletion of fossil resources and elevated levels of greenhouse gases accelerating climate change and global warming provoke a renaissance of biotechnological production of various organic bulk chemicals, which, particularly during the second half of the 20th century, were almost exclusively produced from fossil resources via chemosynthetic processes. Scope: Besides the manufacture of bioethanol, a product obtained by microbial fermentation, biogenic production of solvents and energy carriers like acetone, isopropanol, 2,3-butanediol, or 1-butanol, hence, processes known since the beginning of the last century, experiences now a substantial revival. Summary of new synthesis and conclusions reached in the review: The review illustrates how to produce these products by resorting to fossil raw materials instead of petrochemical production processes, and how this can be accomplished by the cultivation of anaerobic organisms, namely facultatively anaerobic yeasts and bacteria (production of ethanol or 2,3-butanediol), and strictly anaerobic Clostridia (1-butanol, acetone, or isopropanol) on renewable resources. Moreover, novel methods for producing biodiesel-like methyl-esters of aerobically produced bacterial polyhydroxyalkanoate biopolyester building blocks combine the synthesis of microbial biopolyesters from wastewater with the progress of innovative renewable energy carriers. The biochemical background, the current state of research and development, and the status of industrialization of these processes are reviewed. Conclusion: Challenges to make these bioprocesses, based on inexpensive renewable resources, competitive with or even superior to petrochemical production routes in terms of sustainability, scalability, and economic feasibility still exist: however, they can be overcome by the concerted action of various scientific disciplines.

show abstract

“…Another research reported 88.2 g/L RS after enzymatic hydrolysis with 20% PPW. The maximum ethanol concentration of 23.3 g/L was produced under optimum conditions [48]. This effort is promising for the provision of cheaper substrates for various biotechnological processes such as the production of second-generation bioethanol.…”

Section: Introductionmentioning

confidence: 98%

Optimization of Alkali Treatment for Production of Fermentable Sugars and Phenolic Compounds from Potato Peel Waste Using Topographical Characterization and FTIR Spectroscopy

Mushtaq,

Joly,

Martin

et al. 2023

Molecules

View full text Add to dashboard Cite

Potato peel waste (PPW) was utilized as a bio-template for the production of valuable compounds such as reducing sugars (RS), total sugar (TS) and total phenolic compounds (TPC). Two methods of alkali treatments, i.e., chemical (NaOH) and thermochemical (NaOH assisted with autoclaving) processes, were employed for the deconstruction of PPW. Response surface methodology (RSM) was used to study the effects of alkali concentration (0.6–1.0 w/v), substrate concentration (5–15 g) and time (4–8 h) on the extraction of RS, TS and TP from PPW. The application of alkali plus steam treatment in Box-Behnken design (BBD) with three levels yielded the optimum releases of RS, TS and TP as 7.163, 28.971 and 4.064 mg/mL, respectively, corresponding to 10% substrate loading, in 0.6% NaOH for 8 h. However, the alkali treatment reported optimum extractions of RS, TS and TP as 4.061, 17.432 and 2.993 mg/mL, respectively. The thermochemical pretreatment was proven a beneficial process as it led to higher productions of TP. FTIR and SEM were used to analyze the deterioration levels of the substrate. The present work was used to explore the sustainable management of PPW, which is a highly neglected substrate bioresource but is excessively dumped in open environment, raising environmental concerns. The cost-effective methods for the breakdown of PPW starch into fermentable sugars might be utilized to extract valuable compounds.

show abstract

Valorization of Zymomonas mobilis for bioethanol production from potato peel: fermentation process optimization

Cited by 11 publications

References 21 publications

Cellulolytic and Ethanologenic Evaluation of Heterotermes indicola’s Gut-Associated Bacterial Isolates

Cellulolytic and Ethanologenic Evaluation of Heterotermes indicola’s Gut-Associated Bacterial Isolates

Biotechnological Approaches to Generate Biogenic Solvents and Energy Carriers from Renewable Resources

Optimization of Alkali Treatment for Production of Fermentable Sugars and Phenolic Compounds from Potato Peel Waste Using Topographical Characterization and FTIR Spectroscopy

Contact Info

Product

Resources

About