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Water
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Application of Biotechnology in Wastewater Treatment
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Application of Biotechnology in Wastewater Treatment

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

Deadline for manuscript submissions: closed (24 October 2022) | Viewed by 5898

Special Issue Editors

Dr. Min Zheng

E-Mail Website
Guest Editor
Australian Centre for Water and Environmental Biotechnology, The University of Queensland, Brisbane, Australia
Interests: integrated urban water management; activated sludge processes; resource recovery; anaerobic processes; nitrification and nitrifying microorganisms; metagenomics; sewer corrosion; environmental biotechnology
Dr. Jia Meng

E-Mail Website
Guest Editor
School of Environment, Harbin Institute of Technology, Harbin, China
Interests: waste(water) treatment; nitrogen removal; bioenergy recovery; butanol fermentation; environmental biotechnology
Dr. Philip Antwi

E-Mail Website1 Website2
Guest Editor
Resources and Environment Engineering Institute, Jiangxi University of Science and Technology, Ganzhou, China
Interests: wastewater treatment and reuse technologies; circular economy waste-to-energy based research; bioenergy/biofuel production from waste(water); renewable energy, sustainability, and the environment; environmental biotechnology for sustainable development; modeling to predict and optimize complex biological systems

Special Issue Information

Dear Colleagues,

Wastewater contains many pollutants that have been regarded more as a resource. Biotechnologies have been proposed for simultaneous pollutant removal and resource recovery from wastewater. These biotechnologies can also address inherent challenges, including low treatment efficiency of emerging contaminants and emissions of greenhouse gases (e.g., CO2, CH4, and N2O) in wastewater treatment.

This Special Issue invites original research papers or review papers covering the development and/or analysis of innovative biotechnologies to treat and recover valuable resources from wastewater. Example topics that are of interest to this Special Issue include but are not limited to:

  • Nutrient removal and recovery from wastewater;
  • Removal of emerging contaminants, e.g., antibiotics, microplastics, pharmaceuticals and personal care products, perfluorinated compounds;
  • Removal of heavy metals.

Dr. Min Zheng
Dr. Jia Meng
Dr. Philip Antwi
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

  • nutrient removal
  • nutrient recovery
  • emerging contaminants
  • heavy metal
  • antibiotics
  • microplastics

Published Papers (2 papers)

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Research

19 pages, 6159 KiB  
Article
Preparation of Hydrogels Based Radix Isatidis Residue Grafted with Acrylic Acid and Acrylamide for the Removal of Heavy Metals
by Xiaochun Yin, Hai Zhu, Ting Ke, Yonge Gu, Huiyao Wang and Pei Xu
Water 2022, 14(23), 3811; https://doi.org/10.3390/w14233811 - 23 Nov 2022
Cited by 4 | Viewed by 1811
Abstract
A series of hydrogels as biosorbents to remove heavy metal ions (Pb2+, Cu2+, and Cd2+) were prepared using Radix Isatidis residues as material grafted with acrylic acid and acrylamide. The surfaces of Radix Isatidis residue/acrylic acid-co-acrylamide (RIR/AA-co-AM), [...] Read more.
A series of hydrogels as biosorbents to remove heavy metal ions (Pb2+, Cu2+, and Cd2+) were prepared using Radix Isatidis residues as material grafted with acrylic acid and acrylamide. The surfaces of Radix Isatidis residue/acrylic acid-co-acrylamide (RIR/AA-co-AM), Radix Isatidis residue/polyacrylamide (RIR/PAM3), and Radix Isatidis residue/polyacrylic acid (RIR/PAA4) hydrogels have a sponge-like, three-dimensional, and highly microporous structure. The hydrogels all have considerable swelling properties and the swelling rate of RIR/PAA4 is the highest at 9240%. The hydrogels all possess high adsorptivity to Pb2+, Cu2+, and Cd2+. Under optimized conditions, the maximum adsorption capacity of RIR/AA-co-AM hydrogel is 655.4 mg/g for Pb2+, 367.2 mg/g for Cd2+, and 290.5 mg/g for Cu2+. The maximum adsorption capacity of RIR/AA-co-AM hydrogel for Cd2+ and Cu2+ is slightly lower than that of RIR/PAA4. In addition, the adsorption process of RIR/AA-co-AM for heavy metal ions conforms with the pseudo-second-order kinetic equation and Langmuir adsorption isotherm. Based on the microstructure analysis and adsorption kinetics, electrostatic adsorption and ion exchange are identified as the mechanisms for the hydrogels removal of heavy metal ions from water. It infers that hydrogels from Chinese herb residue can be used to effectively remove heavy metals from wastewater and improve the reutilization of Chinese herb residue. Full article
(This article belongs to the Special Issue Application of Biotechnology in Wastewater Treatment)
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16 pages, 7058 KiB  
Article
Nitrogen Removal from the Simulated Wastewater of Ionic Rare Earth Mining Using a Biological Aerated Filter: Influence of Medium and Carbon Source
by Silin Chen, Chengxiu Wu, Benru Song, Philip Antwi, Ming Chen and Wuhui Luo
Water 2022, 14(14), 2246; https://doi.org/10.3390/w14142246 - 17 Jul 2022
Cited by 2 | Viewed by 2252
Abstract
In engineering application, a two-stage biological aerated filter (BAF) has been deployed to achieve the steady nitrogen removal of the wastewater from the mining area of ionic rare earth with a low carbon to nitrogen (C/N) ratio. However, the cost-efficiency of the medium [...] Read more.
In engineering application, a two-stage biological aerated filter (BAF) has been deployed to achieve the steady nitrogen removal of the wastewater from the mining area of ionic rare earth with a low carbon to nitrogen (C/N) ratio. However, the cost-efficiency of the medium and carbon source casts a shadow over further development. In this study, the influences of four media (i.e., volcanic, zeolite, quartz, and ceramisite) and three soluble carbon sources (i.e., acetate, glucose, and methanol) on the N removal were systematically compared. Applying volcanic and quartz showed a favorable start-up performance due to the biophilic surface and dense packing, respectively. However, regardless of medium type, with [NH4+-N]0 = 50 and [NO3−-N]0 = 30 mg/L, the C/N ratio of 3 was required to meet the discharge standards of NH4+-N, TN, and COD, and acetate was confirmed applicable for all the selected medium-packed BAFs. Introduction of sweet potato residues as the solid carbon source decreased the amount of added acetate by more than 13%. The 16S rRNA high-throughput gene sequencing revealed that Sphingomonas and Nitrospira were abundant in the aerobic stages of the volcanic and zeolite-packed BAFs, respectively. Such a community integrated with the extensively distributed Thauera, Clostridium_sensu_stricto, and Proteiniclasticum in the anoxic stage accounted for the efficient N removal. Thus, deploying volcanic as the medium and acetate as the soluble carbon source was proposed. These findings will provide valuable references for the selection of medium and carbon source and, consequently, further optimize the operational performance. Full article
(This article belongs to the Special Issue Application of Biotechnology in Wastewater Treatment)
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