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Membranes
Special Issues
Current Advancements in Membrane Bioreactors
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Current Advancements in Membrane Bioreactors

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".

Deadline for manuscript submissions: closed (25 June 2023) | Viewed by 1819

Special Issue Editor

Dr. Sher Jamal Khan

E-Mail Website
Guest Editor
Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
Interests: membrane-based water purification; aerobic and anaerobic membrane bioreactors (MBRs) for domestic and industrial wastewater treatment; hybrid moving bed biofilm reactor (MBBR)-MBRs; osmotic MBRs for dyebath wastewater treatment and dyes recovery; membrane distillation (MD) MBRs
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The various detrimental effects of wastewater generated from different anthropogenic activities are among the biggest challenges to sustainable development. Among various technologies developed to tackle wastewater, membrane bioreactors (MBRs) have been extensively used in the past few decades due to their cost-effectiveness, wide applications, technical feasibility, etc. MBRs are recognized as a promising solution with superior quality and, more crucially, with a lower environmental footprint. They have been widely applied in municipal and industrial wastewater treatment systems due to their advantages over conventional activated sludge systems. However, at present, MBR technology is still facing problems such as fouling and scaling, energy intensiveness, and relatively high costs compared to conventional processes. Therefore, research and innovative solutions are urgently required to realize the practical application of MBRs. 

This Special Issue specifically focuses on membrane bioreactors. MBRs are deemed to play a major role in the future of safe water production, wastewater reclamation, and resource recovery. Therefore, this Special Issue will focus on different types of MBRs, including hybrid MBR processes, welcoming both original research articles and critical reviews. Topics may include but are not limited to novel MBR technologies, emerging contaminants’ removal, the optimization of existent MBR treatment plants, efficient membrane modification, membrane fouling control, drinking water quality improvement, wastewater reclamation and reuse, resource materials’ recovery, renewable energy production and life cycle assessment. New insights into the fouling phenomena as a main obstacle to widespread MBR plants with recent fouling mitigation methods are encouraged for submission. Efforts regarding novel aerobic and anaerobic MBR processes, including Moving Bed MBR (MBMBR), Membrane Distillation MBR (MDBR) and Osmotic MBR (OsMBR), for the treatment of various wastewater are also welcome. Articles covering the existing limitations of MBRs which prevent them from being practical on a larger scale, the existing challenges and future research efforts are also encouraged.

Dr. Sher Jamal Khan
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. Membranes 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 2700 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

  • MBR processes for wastewater treatment
  • emerging contaminants removal
  • wastewater reclamation and reuse
  • hybrid MBRs
  • renewable energy and resource recovery
  • industrial wastewater treatment
  • MBRs life cycle assessment (LCA)
  • optimization of MBR plants

Published Papers (2 papers)

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Research

11 pages, 1544 KiB  
Article
The Cost Benefit of Refinery Effluent Pretreatment Upstream of Membrane Bioreactors
by Kasro Kakil Hassan Dizayee, Adil Mohammed Raheem and Simon J. Judd
Membranes 2023, 13(8), 715; https://doi.org/10.3390/membranes13080715 - 01 Aug 2023
Cited by 1 | Viewed by 793
Abstract
The established classical method of treating oil refinery effluent is flotation followed by biological treatment. Membrane bioreactors (MBRs) offer more advanced treatment, producing a clarified and potentially reusable treated effluent, but demand robust pretreatment to remove oil and grease (O&G) down to consistent, [...] Read more.
The established classical method of treating oil refinery effluent is flotation followed by biological treatment. Membrane bioreactors (MBRs) offer more advanced treatment, producing a clarified and potentially reusable treated effluent, but demand robust pretreatment to remove oil and grease (O&G) down to consistent, reliably low levels. An analysis of a full-scale conventional oil refinery ETP (effluent treatment plant) based on flotation alone, coupled with projected performance, energy consumption and costs associated with a downstream MBR, have demonstrated satisfactory performance of flotation-based pretreatment. The flotation processes, comprising an API (American Petroleum Institute) separator followed by dissolved air flotation (DAF), provided ~90% removal of both total suspended solids (TSS) and O&G coupled with 75% COD (chemical oxygen demand) removal. The relative energy consumption and cost of the pretreatment, normalised against both the volume treated and COD removed, was considerably less for the API-DAF sequence compared to the MBR. The combined flotation specific energy consumption in kWh was found to be almost an order of magnitude lower than for the MBR (0.091 vs. 0.86 kWh per m3 effluent treated), and the total cost (in terms of the net present value) around one sixth that of the MBR. However, the nature of the respective waste streams generated and the end disposal of waste solids differ significantly between the pretreatment and MBR stages. Full article
(This article belongs to the Special Issue Current Advancements in Membrane Bioreactors)
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16 pages, 5381 KiB  
Article
Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor
by Necati Kayaalp
Membranes 2023, 13(7), 666; https://doi.org/10.3390/membranes13070666 - 14 Jul 2023
Cited by 1 | Viewed by 689
Abstract
Due to low sludge production and being a clean source without residuals, hydrogen-based autotrophic denitrification appears to be a promising choice for nitrate removal from agricultural drainage waters or water/wastewater with a similar composition. Although the incorporation of hydrogen-based autotrophic denitrification with membrane [...] Read more.
Due to low sludge production and being a clean source without residuals, hydrogen-based autotrophic denitrification appears to be a promising choice for nitrate removal from agricultural drainage waters or water/wastewater with a similar composition. Although the incorporation of hydrogen-based autotrophic denitrification with membrane bioreactors (MBRs) enabled almost 100% utilization of hydrogen, the technology still needs to be improved to better utilize its advantages. This study investigated the anoxic treatment of both synthetic and real drainage waters using hydrogen gas in a recently developed membrane bioreactor configuration, a venturi-integrated submerged membrane bioreactor, for the first time. The study examined the effects of the inflow nitrate concentration, and the use of a venturi device on the removal efficiency, as well as the effects of the presence of headspace gas circulation and circulation rate on membrane fouling. The study found that using the headspace gas circulation through a venturi device did not significantly affect the treatment efficiency, and in both cases, a removal efficiency of over 90% was achieved. When the inlet NO3−–N concentration was increased from 50 mg/L to 100 mg/L, the maximum removal efficiency decreased from 98% to 92%. It was observed that the most significant effect of the headspace gas circulation was on the membrane fouling. When the headspace gas was not circulated, the average membrane chemical washing period was 5 days. However, with headspace gas circulation, the membrane washing period increased to an average of 12 days. The study found that the headspace gas circulation method significantly affected membrane fouling. When the upper phase was circulated with a peristaltic pump instead of a venturi device, the membrane washing period decreased to one day. The study calculated the maximum hydrogen utilization efficiency to be approximately 96%. Full article
(This article belongs to the Special Issue Current Advancements in Membrane Bioreactors)
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