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Water
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Biodegradation and Biotransformation in Biological Wastewater Treatment: Advances and Perspectives
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Biodegradation and Biotransformation in Biological Wastewater Treatment: Advances and Perspectives

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 9419

Special Issue Editors

Dr. Xuwang Zhang

E-Mail Website
Guest Editor
School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, China
Interests: wastewater treatment; microbial ecology; environmental microbiology; wetland microbiology; metagenomics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yuanyuan Qu

E-Mail Website
Guest Editor
School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
Interests: wastewater treatment; bioremediation; microbiology; biotechnology; environmental engineering; bioengineering

Special Issue Information

Dear Colleagues,

Bioremediation is a common and widely used approach for wastewater treatment due to its advantages of high efficiency, cost effectiveness and environmental friendliness. Microorganisms, such as bacteria, fungi, yeasts, and algae, play an important role in pollutant removal. Pollutants in wastewater can be aerobically or anaerobically degraded by microorganisms into H2O, CO2 and CH4, and some of the waste can also be biotransformed to valuable chemicals, such as fuels and fine chemicals. In recent decades, our knowledge and understanding of biological wastewater treatment have advanced significantly. There are various biological resources and treatment processes with excellent catalytic activities and outstanding properties emerging for wastewater treatment.

Therefore, this Special Issue of Water on “Biodegradation and Biotransformation in Biological Wastewater Treatment: Advances and Perspectives” seeks original research and review manuscripts on biological wastewater treatment. The topics include but are not limited to:

  • Biodegradation and biotransformation of xenobiotics in wastewater using pure cultures or mixed microbial communities;
  • Biological removal of nutrients (e.g., nitrogen, phosphorous, and sulfur) from wastewater;
  • Recovering nutrients and energy from wastewater based on biological technologies;
  • Biological processes (e.g., SBR, A/O, A/A/O, UASB, MBR, and biofilms) for wastewater treatment;
  • Bioaugmentation, biostimulation, and co-metabolism strategies for wastewater treatment.

Dr. Xuwang Zhang
Prof. Dr. Yuanyuan Qu
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. Water is an international peer-reviewed open access semimonthly 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 2600 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

  • biological wastewater treatment
  • biodegradation
  • biotransformation
  • bioremediation
  • biological resource
  • biological process
  • pure culture
  • mixed microbial community

Published Papers (3 papers)

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Research

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14 pages, 2569 KiB  
Article
Biodegradation and Decolorization of Textile Azo Dyes by Paramecium caudatum Isolated from Industrial Wastewater
by Uzma Ramzan, Farah Rauf Shakoori, Muhammad Tariq Zahid, Waqar Majeed, Itrat Zahra, Syed Zaghum Abbas, Amor Hedfi, Sabry Hassan, Abdul Rauf Shakoori and Abdullah Al Mutery
Water 2022, 14(21), 3553; https://doi.org/10.3390/w14213553 - 04 Nov 2022
Cited by 7 | Viewed by 2365
Abstract
Azo dyes in textile industry effluent are one of the major toxic contaminants causing a severe threat to life. Bioremediation is the most cost-effective and environmentally beneficial innovative biotechnologically technique used to mitigate dyes’ toxic effects in aquatic environments. The purpose of the [...] Read more.
Azo dyes in textile industry effluent are one of the major toxic contaminants causing a severe threat to life. Bioremediation is the most cost-effective and environmentally beneficial innovative biotechnologically technique used to mitigate dyes’ toxic effects in aquatic environments. The purpose of the present study was to determine the azo dyes degradation potential of a ciliate, Paramecium caudatum, isolated from industrial wastewater. Under optimum conditions, P. caudatum was found to possess a 90.86% decolorizing ability of RR2 (reactive red), 83.06% of RB5 (reactive blue) and 85.43% of LY (Levafix reactive yellow) dyes. The P. caudatum showed maximum growth at 25 °C and pH 7.5 in the presence of azo dyes at a concentration of 20 ppm (0.02 mg/mL). After being exposed to RR2, RB5, and LY azo dyes, the level of GSH in P. caudatum increased for the control i.e., 54, 43, and 23%, respectively. Sequentially, the GSSG level decreased by 26% after treatment with the LY azo dye, while exposure to RR2 and RB5 enhanced the value by more than twofold and by 0.86%. The results for the decolorization and biodegradation of azo dyes indicated that P. caudatum is a potential candidate for the treatment of textile industry effluents. Full article
(This article belongs to the Special Issue Biodegradation and Biotransformation in Biological Wastewater Treatment: Advances and Perspectives)
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12 pages, 3178 KiB  
Article
Establishing and Optimizing a Bacterial Consortia for Effective Biodegradation of Petroleum Contaminants: Advancing Classical Microbiology via Experimental and Mathematical Approach
by Baichun Wu, Jingmin Deng, Hao Niu, Jiahao Liang, Muhammad Arslan, Mohamed Gamal El-Din, Qinghong Wang, Shaohui Guo and Chunmao Chen
Water 2021, 13(22), 3311; https://doi.org/10.3390/w13223311 - 22 Nov 2021
Cited by 7 | Viewed by 2844
Abstract
In classical microbiology, developing a high-efficiency bacterial consortium is a great challenge for faster biodegradation of petroleum contaminants. In this study, a systematic experimental and mathematical procedure was adopted to establish a bacterial consortium for the effective biodegradation of heavy oil constituents. A [...] Read more.
In classical microbiology, developing a high-efficiency bacterial consortium is a great challenge for faster biodegradation of petroleum contaminants. In this study, a systematic experimental and mathematical procedure was adopted to establish a bacterial consortium for the effective biodegradation of heavy oil constituents. A total of 27 bacterial consortia were established as per orthogonal experiments, using 8 petroleum-degrading bacterial strains. These bacteria were closer phylogenetic relatives of Brevundimonas sp. Tibet-IX23 (Y1), Bacillus firmus YHSA15, B. cereus MTCC 9817, B. aquimaris AT8 (Y2, Y6 and Y7), Pseudomonas alcaligenes NBRC (Y3), Microbacterium oxydans CV8.4 (Y4), Rhodococcus erythropolis SBUG 2052 (Y5), and Planococcus sp. Tibet-IX21 (Y8), and were used in different combinations. Partial correlation analysis and a general linear model hereafter were applied to investigate interspecific relationships among different strains and consortia. The Y1 bacterial species showed a remarkable synergy, whereas Y3, Y4, and Y6 displayed a strong antagonism in all consortia. Inoculation ratios of different strains significantly influenced biodegradation. An optimal consortium was constructed with Y1, Y2, Y5, Y7, and Y8, which revealed maximum degradation of 11.238 mg/mL OD600 for oil contaminants. This study provides a line of evidence that a functional consortium can be established by mathematical models for improved bioremediation of petroleum-contaminated environment. Full article
(This article belongs to the Special Issue Biodegradation and Biotransformation in Biological Wastewater Treatment: Advances and Perspectives)
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Review

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23 pages, 14574 KiB  
Review
New Insights for Exploring the Risks of Bioaccumulation, Molecular Mechanisms, and Cellular Toxicities of AgNPs in Aquatic Ecosystem
by Uzma Ramzan, Waqar Majeed, Abdul Ahad Hussain, Fasiha Qurashi, Safi Ur Rehman Qamar, Muhammad Naeem, Jalal Uddin, Ajmal Khan, Ahmed Al-Harrasi, Saiful Izwan Abd Razak and Tze Yan Lee
Water 2022, 14(14), 2192; https://doi.org/10.3390/w14142192 - 11 Jul 2022
Cited by 12 | Viewed by 3091
Abstract
Silver nanoparticles (AgNPs) are commonly used in numerous consumer products, including textiles, cosmetics, and health care items. The widespread usage of AgNPs results in their unavoidable discharge into the ecosystem, which pollutes the aquatic, groundwater, sediments, and marine environments. These nanoparticles (NPs) activate [...] Read more.
Silver nanoparticles (AgNPs) are commonly used in numerous consumer products, including textiles, cosmetics, and health care items. The widespread usage of AgNPs results in their unavoidable discharge into the ecosystem, which pollutes the aquatic, groundwater, sediments, and marine environments. These nanoparticles (NPs) activate the production of free radicals reactive species in aquatic organisms that interrupt the functions of DNA, cause mitochondrial dysfunction, and increase lipid peroxidation, which terminates the development and reproduction both in vivo and in vitro. The life present in the aquatic ecosystem is becoming threatened due to the release and exploitation of AgNPs. Managing the aquatic ecosystem from the AgNP effects in the near future is highly recommended. In this review, we discussed the background of AgNPs, their discharge, and uptake by aquatic organisms, the mechanism of toxicity, different pathways of cytotoxicity, and bioaccumulation, particularly in aquatic organisms. We have also discussed the antimicrobial activities of AgNPs along with acute and chronic toxicity in aquatic groups of organisms. Full article
(This article belongs to the Special Issue Biodegradation and Biotransformation in Biological Wastewater Treatment: Advances and Perspectives)
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