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Energies
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Energy and New Materials for Sustainable Water and Wastewater Treatment
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Energy and New Materials for Sustainable Water and Wastewater Treatment

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "B: Energy and Environment".

Deadline for manuscript submissions: closed (30 June 2019) | Viewed by 25136

Special Issue Editors

Prof. Dr. Kyu-Jung Chae

E-Mail Website
Guest Editor
Department of Environmental Engineering, Korea Maritime and Ocean University (KMOU), 727 Taejong-ro, Yeongdo-gu, Busan 49112, Republic of Korea
Interests: electrosynthesis of value-added chemicals; water–energy nexus technology; advanced water and wastewater treatment; membrane technology; environmental nano- and biotechnology; energy self-sufficient wastewater treatment; microbial fuel cells; microbial electrolysis cells; biogas plant
Special Issues, Collections and Topics in MDPI journals
Dr. Jieun Lee

E-Mail Website
Guest Editor
Department of Environmental Engineering, Korea Maritime and Ocean University (KMOU), 727 Taejong-ro, Yeongdo-gu, Busan 49112, Korea
Interests: fabrication and characterization of nanocomposite membrane for water treatment; membrane technology

Special Issue Information

Dear Colleagues,

Water and energy are crucial for the sustainable future technology addressing research questions on climate change. Due to their interdependence, a huge amount of energy is consumed to produce clean water and vice versa. Thus, further research has been focused on engineering novel materials and energy harvesting in order to achieve (i) energy sufficiency in water/wastewater treatment and membrane process and (ii) sustainable bioelectrochemical systems that can simultaneously produce bioenergy and wastewater treatment. For this, diverse approaches incorporating nanocomposite with multifunctionality have been actively employed to developing novel membrane material, water/wastewater treatment systems, and electrode material in various types of bioelectrochemical systems, such as microbial electrolysis cells.

In this regard, the Special Issue of “Energy and New Materials for Sustainable Water and Wastewater Treatment” invites all the multidisciplinary studies related to water–energy nexus technologies on process design and material fabrication in energy-efficient water/wastewater treatment, membrane process, energy recovery from wastewater treatment, and bioelectrochemical systems in both academia and industry. Original research and studies with empirical, theoretical, computational works, and review papers are welcomed. All selected papers after intensive peer-review will be published instantly in the Special Issue of Energies (SCIE journal, 2017 IF=2.676), for rapid dissemination of those dedicated works.

I am looking forward to your dedication that will have a significant impact on the development of sustainable and environmentally friendly technology.

Assoc. Prof. Kyu-Jung Chae
Dr. Jieun Lee
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. Energies 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

  • Water–energy nexus technology
  • Novel material development for advanced water treatment
  • Membrane technology
  • Advanced, energy-efficient water and wastewater treatment
  • Energy self-sufficient wastewater treatment
  • System design and material development in bioelectrochemical system (microbial fuel cell, microbial electrolysis cell, etc.)
  • Bioelectrochemical system for electricity, biofuel, and value-added chemical production
  • Energy harvesting in water/wastewater treatment
  • Ecofriendly technology for sustainable water treatment
  • Bioelectrochemistry

Published Papers (4 papers)

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Research

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13 pages, 4660 KiB  
Article
Effects of High Sludge Cycle Frequency on Performance and Syntrophic Metabolism of Anaerobic Membrane Bioreactor for Treating High-Lipid Kitchen Waste Slurry
by Xiaolan Xiao, Wansheng Shi and Wenquan Ruan
Energies 2019, 12(14), 2673; https://doi.org/10.3390/en12142673 - 12 Jul 2019
Cited by 3 | Viewed by 1909
Abstract
The performance and syntrophic metabolism of the Anaerobic Membrane Bio-reactor (AnMBR) treating high-lipid kitchen waste slurry under different sludge cycle frequencies were investigated in this study. When the sludge cycle frequencies were 3.6 cycles/h, 9.0 cycles/h and 14.4 cycles/h, the obtained Organic Loading [...] Read more.
The performance and syntrophic metabolism of the Anaerobic Membrane Bio-reactor (AnMBR) treating high-lipid kitchen waste slurry under different sludge cycle frequencies were investigated in this study. When the sludge cycle frequencies were 3.6 cycles/h, 9.0 cycles/h and 14.4 cycles/h, the obtained Organic Loading Rates (OLRs) were 10.3 kg-COD/m3d, 12.4 kg-COD/m3d and 18.1 kg-COD/m3d, while the corresponding biogas productions were 190 L/d, 310 L/d and 520 L/d. Moreover, with an increase of sludge cycle frequency, the Chemical Oxygen Demand (COD) removal efficiency improved from 86.2% to 90.4% and 96.3%. Additionally, the higher sludge cycle frequency did not break up the sludge flocs and further affect the syntrophic degradation of the toxic Long-Chain Fatty Acids (LCFAs). Conversely, the higher sludge cycle frequency enhanced LCFA degradation and decreased LCFA accumulation. Meanwhile, under higher sludge cycle frequencies, the abundance of syntrophic Methanobacterium, Syntrophomonas and Clostridium increased and favored the syntrophic metabolism of LCFAs. Full article
(This article belongs to the Special Issue Energy and New Materials for Sustainable Water and Wastewater Treatment)
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13 pages, 1963 KiB  
Article
Electrochemical Removal of Ammonium Nitrogen and COD of Domestic Wastewater using Platinum Coated Titanium as an Anode Electrode
by Umesh Ghimire, Min Jang, Sokhee P. Jung, Daeryong Park, Se Jin Park, Hanchao Yu and Sang-Eun Oh
Energies 2019, 12(5), 883; https://doi.org/10.3390/en12050883 - 07 Mar 2019
Cited by 67 | Viewed by 5288
Abstract
Biological treatment systems face many challenges in winter to reduce the level of nitrogen due to low temperatures. The present work aimed to study an electrochemical treatment to investigate the effect of applying an electric voltage to wastewater to reduce the ammonium nitrogen [...] Read more.
Biological treatment systems face many challenges in winter to reduce the level of nitrogen due to low temperatures. The present work aimed to study an electrochemical treatment to investigate the effect of applying an electric voltage to wastewater to reduce the ammonium nitrogen and COD (chemical oxygen demand) in domestic wastewater. This was done by using an electrochemical process in which a platinum-coated titanium material was used as an anode and stainless steel was used as a cathode (25 cm2 electrode area/500 mL). Our results indicated that the removal of ammonium nitrogen (NH4+–N) and the lowering of COD was directly proportional to the amount of electric voltage applied between the electrodes. Our seven hour experiment showed that 97.6% of NH4+–N was removed at an electric voltage of 5 V, whereas only 68% was removed with 3 V, 20% with 1.2 V, and 10% with 0.6 V. Similarly, at 5 V, the removal of COD was around 97.5%. Over the seven hours of the experiment, the pH of wastewater increased from pH 7.12 to pH 8.15 when 5 V was applied to the wastewater. Therefore, electric voltage is effective in the oxidation of ammonium nitrogen and the reduction in COD in wastewater. Full article
(This article belongs to the Special Issue Energy and New Materials for Sustainable Water and Wastewater Treatment)
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19 pages, 3050 KiB  
Article
Integration of Membrane Contactors and Bioelectrochemical Systems for CO2 Conversion to CH4
by Rubén Rodríguez-Alegre, Alba Ceballos-Escalera, Daniele Molognoni, Pau Bosch-Jimenez, David Galí, Edxon Licon, Monica Della Pirriera, Julia Garcia-Montaño and Eduard Borràs
Energies 2019, 12(3), 361; https://doi.org/10.3390/en12030361 - 23 Jan 2019
Cited by 23 | Viewed by 3647
Abstract
Anaerobic digestion of sewage sludge produces large amounts of CO2 which contribute to global CO2 emissions. Capture and conversion of CO2 into valuable products is a novel way to reduce CO2 emissions and valorize it. Membrane contactors can be [...] Read more.
Anaerobic digestion of sewage sludge produces large amounts of CO2 which contribute to global CO2 emissions. Capture and conversion of CO2 into valuable products is a novel way to reduce CO2 emissions and valorize it. Membrane contactors can be used for CO2 capture in liquid media, while bioelectrochemical systems (BES) can valorize dissolved CO2 converting it to CH4, through electromethanogenesis (EMG). At the same time, EMG process, which requires electricity to drive the conversion, can be utilized to store electrical energy (eventually coming from renewables surplus) as methane. The study aims integrating the two technologies at a laboratory scale, using for the first time real wastewater as CO2 capture medium. Five replicate EMG-BES cells were built and operated individually at 0.7 V. They were fed with both synthetic and real wastewater, saturated with CO2 by membrane contactors. In a subsequent experimental step, four EMG-BES cells were electrical stacked in series while one was kept as reference. CH4 production reached 4.6 L CH4 m−2 d−1, in line with available literature data, at a specific energy consumption of 16–18 kWh m−3 CH4 (65% energy efficiency). Organic matter was removed from wastewater at approximately 80% efficiency. CO2 conversion efficiency was limited (0.3–3.7%), depending on the amount of CO2 injected in wastewater. Even though achieved performances are not yet competitive with other mature methanation technologies, key knowledge was gained on the integrated operation of membrane contactors and EMG-BES cells, setting the base for upscaling and future implementation of the technology. Full article
(This article belongs to the Special Issue Energy and New Materials for Sustainable Water and Wastewater Treatment)
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Review

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20 pages, 3287 KiB  
Review
Overview of Recent Advancements in the Microbial Fuel Cell from Fundamentals to Applications: Design, Major Elements, and Scalability
by Sami G. A. Flimban, Iqbal M. I. Ismail, Taeyoung Kim and Sang-Eun Oh
Energies 2019, 12(17), 3390; https://doi.org/10.3390/en12173390 - 03 Sep 2019
Cited by 146 | Viewed by 13687
Abstract
Microbial fuel cell (MFC) technology offers an alternative means for producing energy from waste products. In this review, several characteristics of MFC technology that make it revolutionary will be highlighted. First, a brief history presents how bioelectrochemical systems have advanced, ultimately describing the [...] Read more.
Microbial fuel cell (MFC) technology offers an alternative means for producing energy from waste products. In this review, several characteristics of MFC technology that make it revolutionary will be highlighted. First, a brief history presents how bioelectrochemical systems have advanced, ultimately describing the development of microbial fuel cells. Second, the focus is shifted to the attributes that enable MFCs to work efficiently. Next, follows the design of various MFC systems in use including their components and how they are assembled, along with an explanation of how they work. Finally, microbial fuel cell designs and types of main configurations used are presented along with the scalability of the technology for proper application. The present review shows importance of design and elements to reduce energy loss for scaling up the MFC system including the type of electrode, shape of the single reactor, electrical connection method, stack direction, and modulation. These aspects precede making economically applicable large-scale MFCs (over 1 m3 scale) a reality. Full article
(This article belongs to the Special Issue Energy and New Materials for Sustainable Water and Wastewater Treatment)
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