Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.5
3.4
Journals
Water
Special Issues
Biological Wastewater Treatment: Current Advances and Challenges
share announcement

Biological Wastewater Treatment: Current Advances and Challenges

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

Deadline for manuscript submissions: closed (20 April 2022) | Viewed by 5548

Special Issue Editor

Prof. Dr. Lai Peng

E-Mail Website
Guest Editor
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
Interests: novel applications of nutrients removal from wastewater; greenhouse gas emission and mitigation from wastewater treatment; phototroph-based resource recovery from waste streams; micro-pollutants detection and removal in wastewater and sludge systems; mathematical modeling of pollutant biotransformation processes; functional materials for environmental application

Special Issue Information

Dear Colleagues,

Conventional wastewater treatment processes are electricity-intensive and resource-inefficient. The removal performance of certain pollutants, such as heavy metal, antibiotics, microplastics, etc. is weak. The emissions of greenhouse gases (e.g., CO2, CH4, and N2O) during wastewater treatment might dramatically increase the carbon footprint. Hence, these new challenges are now translating into an urgent call for efficient and sustainable removal, recovery, and production technology.

Manuscripts in this Special Issue are expected to focus on but not limited to the following topics: microbial-based technology for C, N, and P recovery from wastewater; quantification, understanding, and mitigation of greenhouse gas emissions (N2O, CH4, CO2) during wastewater treatment; novel applications of nitrogen removal with reduced carbon emission and energy consumption; microbial remediation of heavy metal contamination; biodegradation of emerging pollutants (such as antibiotics, microplastics); and mathematical modeling of pollutant biotransformation processes in wastewater.

Prof. Dr. Lai Peng
Guest Editor

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

  • resource recovery
  • greenhouse gas emissions
  • nitrogen removal
  • heavy metal
  • emerging pollutants
  • mathematical modeling

Published Papers (2 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

21 pages, 4079 KiB  
Article
Oxygen Transfer of Fine-Bubble Aeration in Activated Sludge Treating Saline Industrial Wastewater
by Justus Behnisch, Maximilian Schwarz, Jana Trippel, Markus Engelhart and Martin Wagner
Water 2022, 14(12), 1964; https://0-doi-org.brum.beds.ac.uk/10.3390/w14121964 - 19 Jun 2022
Cited by 2 | Viewed by 2329
Abstract
Aeration is usually the most energy-intensive part of the activated sludge process, accounting for 50% to 80% of the total requirement. To achieve high efficiency, designers and operators of WWTPs must, therefore, consider all influencing factors, including salinity. With increasing salinity, oxygen transfer [...] Read more.
Aeration is usually the most energy-intensive part of the activated sludge process, accounting for 50% to 80% of the total requirement. To achieve high efficiency, designers and operators of WWTPs must, therefore, consider all influencing factors, including salinity. With increasing salinity, oxygen transfer increases compared to tap water (TW), due to the inhibition of bubble coalescence. Previous saline water (SW) experiments showed that by using small slits in the diffuser membrane design, oxygen transfer and aeration efficiency increase further. In this study, we present a modified approach for considering the salt effect on oxygen transfer and assess the transferability of SW results to saline-activated sludge (sAS) conditions. Therefore, we operated a pilot-activated sludge plant over 269 days with a saline industrial wastewater influent. The oxygen transfer of disc-diffusers with two different membrane designs was measured continuously via the off-gas method. The salt concentration (cSalt) measured via ion analysis ranged between 4.9 and 11 g/L. Despite a high cSalt fluctuation, COD elimination was >90% all the time. Our results confirm previous SW results. Oxygen transfer in sAS is up to three times higher compared to non-saline conditions. Aeration efficiency shows that despite a higher pressure drop, diffusers with smaller slits are to be recommended in order to improve aeration in sAS. Full article
(This article belongs to the Special Issue Biological Wastewater Treatment: Current Advances and Challenges)
►▼ Show Figures

Figure 1

15 pages, 2820 KiB  
Article
Simultaneous Biosorption of Arsenic and Cadmium onto Chemically Modified Chlorella vulgaris and Spirulinaplatensis
by Wenlong Lu, Yifeng Xu, Chuanzhou Liang, Baba Imoro Musah and Lai Peng
Water 2021, 13(18), 2498; https://0-doi-org.brum.beds.ac.uk/10.3390/w13182498 - 11 Sep 2021
Cited by 7 | Viewed by 2628
Abstract
The biosorption behaviour of arsenic(V) and cadmium(II) ions by unmodified and five types of chemically modified Chlorella vulgaris and Spirulina platensis was investigated. The biosorption rates of As(V) and Cd(II) in binary metal solutions were lower than those in sole metal systems, which [...] Read more.
The biosorption behaviour of arsenic(V) and cadmium(II) ions by unmodified and five types of chemically modified Chlorella vulgaris and Spirulina platensis was investigated. The biosorption rates of As(V) and Cd(II) in binary metal solutions were lower than those in sole metal systems, which exhibited a competition between As(V) and Cd(II) ions to occupy the active sites of the adsorbent. Among the five chemical reagents, NaCl and ZnCl2 were the most suitable modifiers for improving the biosorption performance of C. vulgaris and S. platensis, respectively. The maximum biosorption capacities of As(V) and Cd(II) were: (a) 20.9 and 1.2 mg/g, respectively, for C. vulgaris modified with NaCl; (b) 24.8 and 29.4 mg/g, respectively, for S. platensis modified with ZnCl2, which were much higher than those using other chemically modifying methods. The pseudo-second-order kinetic model fitted well with all the biosorption processes. The SEM analysis revealed that the modification changed the surface morphologies and enhanced the porosity of the algae biomass. The FTIR analysis established the presence of diverse groups of compounds that were largely hydroxyl, carboxylate, amino, and amide groups on the adsorbents that contributed significantly to the upregulated biosorption. This work showed the potential application of chemically modified C. vulgaris and S. platensis biomasses to effectively remove both from water. Full article
(This article belongs to the Special Issue Biological Wastewater Treatment: Current Advances and Challenges)
►▼ Show Figures

Graphical abstract

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-2
Back to TopTop