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Processes
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Advances in Microbial Biotechnology and Bioengineering Processes
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Advances in Microbial Biotechnology and Bioengineering Processes

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

Deadline for manuscript submissions: closed (10 March 2024) | Viewed by 3298

Special Issue Editors

Dr. Shao-Wen Hung

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Guest Editor
Division of Animal Industry, Animal Technology Research Center, Agricultural Technology Research Institute, Hsinchu City 300-110, Taiwan
Interests: fish and shellfish immunology; oncology and cancer medicine; veterinary medicine and immunology; fish diseases and therapy; flow cytometry; experimental animal; animal welfare; epilepsy
Special Issues, Collections and Topics in MDPI journals
Dr. Tseng-Ting Kao

E-Mail Website
Guest Editor
Division of Animal Technology, Animal Technology Research Center, Agricultural Technology Research Institute, Hsinchu City 300-110, Taiwan
Interests: aging; disease animal model; dermatology and dermatitis; arthritis; folate metabolism; oxidative stress; inflammation; intestinal microbiota; alternatives to animal testing
Special Issues, Collections and Topics in MDPI journals
Dr. Chung-Lun Lu

E-Mail Website
Guest Editor
Aquatic Technology Research Center, Agricultural Technology Research Institute, Hsinchu City 300-110, Taiwan
Interests: fish diseases and therapy; beneficial feed additives; aquaculture; acute and chronic toxicity tests of aquatic animals
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Advances in Microbial Biotechnology and Bioengineering Processes have led to a deeper understanding of the intricate workings of nature, offering exciting possibilities of applying biological principles to diverse scientific fields. These innovations hold promise in addressing crucial concerns such as enhancing crop productivity through microbial interventions, mitigating the depletion of natural resources, tackling environmental pollution through microbial degradation of pollutants, exploring nanomaterials, nanotoxicity, and safety considerations, as well as ensuring the safety of food and agricultural products.

Concurrently, there has been a surging demand for natural bio-products with therapeutic and industrial applications in healthcare, environmental remediation, and microbial biotechnology. With a growing awareness of environmental issues like climate change, energy consumption, and the finite nature of non-renewable resources, there is a heightened focus on research endeavors that offer potential solutions to these challenges.

One particularly promising avenue is the emerging microbiome approach, which has the potential to significantly enhance agriculture productivity and human healthcare. These advancements align with the pursuit of sustainable development goals, contributing to a more resilient and eco-friendly future. The integration of microbial biotechnology into various scientific disciplines offers fascinating prospects for sustainable elucidations and positively impacts our global efforts towards a more harmonious coexistence with the environment.

Dr. Shao-Wen Hung
Dr. Tseng-Ting Kao
Dr. Chung-Lun Lu
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

  • advancements
  • microbial biotechnology
  • food
  • interventions
  • agricultural products
  • healthcare
  • safety
  • challenges

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

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Research

17 pages, 5308 KiB  
Article
Analysis of the Effects of Surfactants on Extracellular Polymeric Substances
by Hongyu Zhang, Xuecheng Zheng and Dongmin Lai
Processes 2023, 11(11), 3212; https://doi.org/10.3390/pr11113212 - 11 Nov 2023
Viewed by 1414
Abstract
Reservoirs after chemical flooding usually have residual chemicals, which can affect the driving effect of subsequent microbial drives. Among them, the effect of surfactants on the metabolites of oil-recovering bacteria is the most obvious. Therefore, this paper investigates the influence mechanism of sodium [...] Read more.
Reservoirs after chemical flooding usually have residual chemicals, which can affect the driving effect of subsequent microbial drives. Among them, the effect of surfactants on the metabolites of oil-recovering bacteria is the most obvious. Therefore, this paper investigates the influence mechanism of sodium dodecyl sulfate (SDS) on the nature and structure of Extracellular Polymeric Substances (EPS) produced by metabolism of Enterobacter cloacae, through a variety of characterization to analysis the components and structure of EPS under SDS stress. The results showed that Enterobacter cloacae was identified as a glycolipid-producing strain, the main components of EPS were polysaccharides and proteins. The polysaccharide composition (%: w/w) was glucosamine, 37.2; glucose, 31.5; rhamnose, 26.3; xylose, 1.7; and unidentified sugar, 3.3; and the main component of proteins was polyglutamic acid. EPS under the stress of SDS showed an increase in the content of functional groups such as -C=O and -COOH and an increase in the cellular particle size, and production of EPS increased by 10.69 × 103 mg/L when the SDS concentration was 2.5 × 102 mg/L; 3D-EEM results showed that the components of all three types of EPS The 3D-EEM results showed that all three types of EPS fractions contained tryptophan and protein-like substances, humic acid-like substances were only distributed in the solubilized extracellular polymers (SL-EPS), and aromatic proteins were only present in the loosely bound type (LB-EPS) and tightly bound type (TB-EPS). In addition, the peaks representing humic-like substances showed a blue shift, indicating that SDS had the greatest effect on SL-EPS. This study provides a guidance for refining the mechanism of strain EPS response to reservoir residual surfactant SDS, and provides a more comprehensive and in-depth understanding of surfactant-protein interactions. Full article
(This article belongs to the Special Issue Advances in Microbial Biotechnology and Bioengineering Processes)
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14 pages, 2632 KiB  
Article
Combined Bacterial and Pressure Oxidation for Processing High-Sulfur Refractory Gold Concentrate
by Anna Boduen, Maxim Zalesov, Vitaliy Melamud, Victoria Grigorieva and Aleksandr Bulaev
Processes 2023, 11(11), 3062; https://doi.org/10.3390/pr11113062 - 25 Oct 2023
Cited by 2 | Viewed by 1541
Abstract
Microbially assisted bio-oxidation of sulfide concentrates in stirred-tank reactors (stirred-tank reactor bio-oxidation (STRB)) and acid pressure oxidation (POX) are widely used to pretreat refractory sulfide concentrates and increase gold extraction via cyanidation. Continuous STRB requires a comparatively long residence time; however, in some [...] Read more.
Microbially assisted bio-oxidation of sulfide concentrates in stirred-tank reactors (stirred-tank reactor bio-oxidation (STRB)) and acid pressure oxidation (POX) are widely used to pretreat refractory sulfide concentrates and increase gold extraction via cyanidation. Continuous STRB requires a comparatively long residence time; however, in some cases, it cannot effectively oxidize some sulfide minerals. POX enables oxidation in a short residence time. At the same time, if a processed concentrate contains a large amount of sulfur, it decreases the ratio of the solid mineral phase to liquid (pulp density) during POX and limits its economic attractiveness. In the present work, experiments were performed to investigate the problems associated with both processing methods for refractory sulfide concentrates. The experiments combined both treatments (STRB and POX) based on the example of a pyrite–arsenopyrite gold-bearing concentrate. The gold recovery from the untreated concentrate via cyanidation reached 58%. Continuous STRB for 2, 4, and 6 days oxidized 43, 74, and 79% of the sulfide sulfur (Ss), respectively. The gold recovery rates from the bio-oxidation residues were 68, 82, and 88%, respectively. The pressure oxidation of both the concentrate and STRB residues increased Ss oxidation by 97–99% and gold recovery by 96–97%. For 2 days, STRB decreased the Ss content and increased the possible liquid-to-solid ratio for POX. The combined processes result in a new promising direction because the POX stage allows high gold recovery, whereas combining STRB and POX provides products for further POX in terms of Ss content and increases POX productivity. Full article
(This article belongs to the Special Issue Advances in Microbial Biotechnology and Bioengineering Processes)
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