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Processes
Special Issues
Enzyme Production Using Industrial and Agricultural By-Products
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Enzyme Production Using Industrial and Agricultural By-Products

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Biological Processes and Systems".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 1701

Special Issue Editors

Dr. Heitor Bento

E-Mail Website
Guest Editor
Department of Bioprocess Engineering and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara, Brazil
Interests: biofuels; enzyme immobilization; magnetic particles; bioprocesses
Special Issues, Collections and Topics in MDPI journals
Dr. Ana Karine F. Carvalho

E-Mail Website
Guest Editor
Department of Basic and Environmental Sciences, Engineering School of Lorena, Universidade de São Paulodisabled, Sao Paulo, Brazil
Interests: biomass conversion; bioenergy; biochar; lignin chemistry and applications; nanolignin biocomposites waste valorization; biorefinery

Special Issue Information

Dear Colleagues,

It is well known that the global enzyme market continues to exhibit significant growth and is a pivotal component of various industries, ranging from pharmaceuticals and food processing to biofuel production and environmental remediation. One notable avenue for optimizing enzyme production is the utilization of industrial and agricultural by-products. These often-overlooked resources can be repurposed to not only lower the overall cost of enzyme production but also align with sustainable practices. By harnessing these by-products, we reduce waste, minimize environmental impacts, and enhance resource efficiency. Integrating these resources into enzyme production processes requires interdisciplinary cooperation and innovative technologies, which represents a transformative step toward establishing a circular bioeconomy. Therefore, we would like to invite you to submit original research or a review paper to this Special Issue of Processes entitled “Enzyme Production Using Industrial and Agricultural By-Products”. The topics of interest for this Special Issue include, but are not limited to, the following:

  • Fermentative processes valuing industrial and agricultural by-products;
  • Technical and economic analysis of biorefineries;
  • Novel enzyme characterization and applications;
  • Batch and continuous cultivation for enzyme production;
  • Enzymatic bioreactor design;

Dr. Heitor Bento
Dr. Ana Karine F. Carvalho
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • biorefinery
  • waste valorization
  • economic analysis
  • solid fermentation
  • submerged fermentation
  • fungal enzymes
  • cellulolytic enzymes
  • lipases
  • amylases

Published Papers (2 papers)

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Research

11 pages, 4514 KiB  
Article
Enzymatic Pretreatment of Slaughterhouse Wastewater: Application of Whole Lipolytic Cells of Rhizopus oryzae Produced from Residual Vegetable Oil
by Willian S. M. Reis, Heitor B. S. Bento, Ana K. F. Carvalho and Ernandes B. Pereira
Processes 2024, 12(3), 500; https://doi.org/10.3390/pr12030500 - 28 Feb 2024
Viewed by 595
Abstract
This study assessed the application of whole lipolytic cells in the pretreatment of slaughterhouse wastewater to reduce its lipid content. The fungal biomass of Rhizopus oryzae was evaluated in the hydrolysis of slaughterhouse wastewater containing high lipid concentrations, focusing on the biomass’s concentration [...] Read more.
This study assessed the application of whole lipolytic cells in the pretreatment of slaughterhouse wastewater to reduce its lipid content. The fungal biomass of Rhizopus oryzae was evaluated in the hydrolysis of slaughterhouse wastewater containing high lipid concentrations, focusing on the biomass’s concentration and the effect of using an emulsifier and surfactant. The use of the whole-cells lipase of Rhizopus oryzae grown in a residual vegetable oil medium proved effective in the hydrolysis of slaughterhouse wastewater, generating concentrations of free fatty acids (FFA) ranging from 40.36 to 90.14 mM. The action of lipase in the hydrolysis of slaughterhouse residues indicated its effectiveness in pretreating lipid-rich liquid residues, potentially boosting the microbiota of this anaerobic treatment. The results showed that lipase activity without surfactant exhibited a similar performance to that of Triton X-100 in the hydrolysis of liquid residues. However, the combination of lipase and surfactant could represent a promising strategy to optimize free fatty acid production from slaughterhouse residues, strengthening anaerobic treatment processes and potentially enhancing the overall efficiency of waste management systems. Full article
(This article belongs to the Special Issue Enzyme Production Using Industrial and Agricultural By-Products)
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14 pages, 2129 KiB  
Article
Xylanase Production by Cellulomonas phragmiteti Using Lignocellulosic Waste Materials
by Kata Buda, Tünde Fekete, Ornella M. Ontañon, Eleonora Campos and Csaba Fehér
Processes 2024, 12(2), 258; https://doi.org/10.3390/pr12020258 - 25 Jan 2024
Viewed by 890
Abstract
Lignocellulosic biomass holds promise as a renewable feedstock for various applications, but its efficient conversion requires cost-effective degradation strategies. The main objective of this study was to investigate the effect of the growth conditions of Cellulomonas phragmiteti in the production of (hemi)cellulosic supernatants. [...] Read more.
Lignocellulosic biomass holds promise as a renewable feedstock for various applications, but its efficient conversion requires cost-effective degradation strategies. The main objective of this study was to investigate the effect of the growth conditions of Cellulomonas phragmiteti in the production of (hemi)cellulosic supernatants. To meet this aim, different lignocellulosic residues were used as carbon sources for growth using defined mineral or nutritive culture media. Cell-free culture supernatants with xylanolytic activity were produced in all the conditions evaluated, but the highest xylanase activity (15.3 U/mL) was achieved in Luria–Bertani (LB) medium containing 1% waste paper. Under these conditions, almost negligible β-glucosidase, cellobiohydrolase, β-xylosidase, and α-arabinofuranosidase activity was detected. The xylanolytic supernatant showed tolerance to salt and displayed maximal catalytic efficiency at pH 6 and 45 °C, along with good activity in the ranges of 45–55 °C and pH 5–8. As it showed good stability at 45 °C, the supernatant was employed for the hydrolysis of birchwood xylan (50 g/L) under optimal conditions, releasing 10.7 g/L xylose in 72 h. Thus, C. phragmiteti was found to produce a xylanolytic enzymatic supernatant efficiently by utilizing the cheap and abundant lignocellulosic residue of waste paper, and the produced supernatant has promising attributes for industrial applications. Full article
(This article belongs to the Special Issue Enzyme Production Using Industrial and Agricultural By-Products)
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