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Energies
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Innovative Biodegradation Processes for Environmental Contaminants Removal
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Innovative Biodegradation Processes for Environmental Contaminants Removal

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A4: Bio-Energy".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 6248

Special Issue Editor

Prof. Dr. Annabelle Couvert

E-Mail Website
Guest Editor
Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR 6226, F-35000 Rennes, France
Interests: outdoor and indoor air treatment; odors; volatile organic compounds (VOCs); gas–liquid absorption; biodegradation; catalytic oxidation

Special Issue Information

Dear colleagues,

Currently, many processes to remove contaminants in water or air matrices are available on the market. Some of them, based on biodegradation mechanisms, show low investment and operating costs but suffer from a lack of novelty and innovation. Coupling biodegradation with other categories of processes, enhancing biological processes, for example, using integrated or new biological systems, or recycled materials, could be a challenging goal in order to propose technological advances in the field of environment.

The authors are invited to contribute to this Special Issue aiming at highlighting technical and scientific innovations in the field of biological processes dedicated to the removal of contaminants in drinking water, wastewater (urban or industrial), and outdoor and indoor air. Papers, reviews, and case studies will have to deal with concrete and original proposals at different scales (laboratory or industrial). Particular attention will be paid on the processes whose design permits low energy consumption, and those answering fundamental questions on circular economy.

Prof. Dr. Annabelle Couvert
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. 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

  • air purification
  • water contaminants removal
  • biochemical engineering
  • biodegradation processes
  • hybrid processes
  • low energy consumption processes
  • recycled material
  • circular economy

Published Papers (3 papers)

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Research

16 pages, 16519 KiB  
Article
Removal of a Mixture of Seven Volatile Organic Compounds (VOCs) Using an Industrial Pilot-Scale Process Combining Absorption in Silicone Oil and Biological Regeneration in a Two-Phase Partitioning Bioreactor (TPPB)
by Margaux Lhuissier, Annabelle Couvert, Patrick Dabert, Abdeltif Amrane, Abdoulaye Kane, Jean-Luc Audic and Eric Dumont
Energies 2022, 15(13), 4576; https://doi.org/10.3390/en15134576 - 23 Jun 2022
Cited by 5 | Viewed by 1719
Abstract
The treatment of a synthetic polluted gas containing seven volatile organic compounds (VOCs) was studied using a pilot plant in real industrial conditions. The process combined VOC absorption in silicone oil (PolyDiMethylSiloxane, i.e., PDMS), a biological regeneration of the PDMS in a two-phase [...] Read more.
The treatment of a synthetic polluted gas containing seven volatile organic compounds (VOCs) was studied using a pilot plant in real industrial conditions. The process combined VOC absorption in silicone oil (PolyDiMethylSiloxane, i.e., PDMS), a biological regeneration of the PDMS in a two-phase partitioning bioreactor (TPPB), and a phase separation including settling and centrifugation. The TPPB was operated at a water/PDMS volume ratio of 75/25. The VOCs treatment performance was efficient during the entire test, corresponding to 10 PDMS regeneration cycles. The analysis of the content of the aqueous phase and PDMS confirmed that VOCs are progressively degraded until mineralization. The nitrogen consumption and the characterization of the microorganisms highlighted possible anoxic functioning of the biomass within the first decanter. Moreover, although the absorption and biodegradation performances were very satisfactory, the separation of all phases, essential for the PDMS recycling, was problematic due to the production of biosurfactants by the microorganisms, leading to the formation of a stable emulsion and foaming episodes. As a consequence, the packed column showed slight fouling. However, no significant increase in the pressure drop of the packed bed, as well as no significant impact on VOC absorption efficiency was observed. Full article
(This article belongs to the Special Issue Innovative Biodegradation Processes for Environmental Contaminants Removal)
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14 pages, 2851 KiB  
Article
A Two-Stage Biogas Desulfurization Process Using Cellular Concrete Filtration and an Anoxic Biotrickling Filter
by Morgane Poser, Luis Rodolfo Duarte E. Silva, Pascal Peu, Éric Dumont and Annabelle Couvert
Energies 2022, 15(10), 3762; https://doi.org/10.3390/en15103762 - 20 May 2022
Cited by 5 | Viewed by 1467
Abstract
A two-stage desulfurization process including an abiotic filtration using cellular concrete waste (first stage) and an anoxic biotrickling filter filling with an inoculated expanded schist material (second stage) was investigated to remove H2S in mimic biogas with limited O2 amount [...] Read more.
A two-stage desulfurization process including an abiotic filtration using cellular concrete waste (first stage) and an anoxic biotrickling filter filling with an inoculated expanded schist material (second stage) was investigated to remove H2S in mimic biogas with limited O2 amount (ranged from 0.5 to 0.8%). The two-stage process was able to satisfactorily remove H2S for all experimental conditions (RE > 97%; H2S concentration = 1500 mg m−3; total Empty Bed Residence Time (EBRT) = 200 s; removal capacity (RC) = 26 g m−3 h−1). Moreover, at a total EBRT = 360 s (i.e., 180 s for each stage), the H2S loading rate (LR) was almost treated by the bed of cellular concrete alone, indicating that abiotic filtration could be applied to satisfactorily remove H2S contained in the gas. According to the H2S concentration entering the biotrickling filter, the majority end-product was either elemental sulfur (S0) or sulfate (SO42−). Thus, the ability of the abiotic filter to remove a significant part of H2S would avoid the clogging of the biotrickling filter due to the deposit of S0. Consequently, this two-stage desulfurization process is a promising technology for efficient and economical biogas cleaning adapted to biogas containing limited O2 amounts, such as landfill biogas. Full article
(This article belongs to the Special Issue Innovative Biodegradation Processes for Environmental Contaminants Removal)
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20 pages, 3830 KiB  
Article
Application of Moving Bed Biofilm Reactor and Fixed Bed Hybrid Biological Reactor for Oilfield Produced Water Treatment: Influence of Total Dissolved Solids Concentration
by Nicolas Lusinier, Isabelle Seyssiecq, Cecilia Sambusiti, Matthieu Jacob, Nicolas Lesage and Nicolas Roche
Energies 2021, 14(21), 7297; https://doi.org/10.3390/en14217297 - 4 Nov 2021
Cited by 2 | Viewed by 2095
Abstract
This experimental paper deals with the development of a hybrid biological reactor for the treatment of a synthetic oilfield produced water under an increase in total dissolved solids (TDS) concentration. To comply with strengthening regulations concerning produced water discharge and peculiar produced water [...] Read more.
This experimental paper deals with the development of a hybrid biological reactor for the treatment of a synthetic oilfield produced water under an increase in total dissolved solids (TDS) concentration. To comply with strengthening regulations concerning produced water discharge and peculiar produced water compositions, a moving bed biofilm reactor (MBBR) consisting in a combination of free activated sludge and moving biofilm supports was compared to a fixed bed hybrid biological reactor (FBHBR) consisting in a combination of free activated sludge and a fixed biofilm support. After a 216 days experimental period, the MBBR and the FBHBR were efficient to treat a synthetic produced water with chemical oxygen demand (COD) removal rate above 90% under an increase in TDS concentrations from 1.5 to 20 g·L−1. Ecotoxicity measurements on freshwater and marine microorganisms revealed an absence of toxicity on treated waters. A decrease in bacterial diversity indices with respect to the inoculum was observed in both bioreactors. This suggests that the increase in TDS concentrations caused the predominance of a low number of bacterial species. Full article
(This article belongs to the Special Issue Innovative Biodegradation Processes for Environmental Contaminants Removal)
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