Application of Environmentally Friendly Technologies in Green Processes, 2nd Edition

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: 15 November 2024 | Viewed by 572

Special Issue Editor


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Guest Editor
Unilasalle-Ecole des Métiers de l’Environnement, Cyclann, Campus de Ker Lann, 35170 Bruz, France
Interests: development of combined processes for the removal of organic pollutants in effluent wastewater ; bioproduction of energy or biobased materials from biomass (biowaste, macro-algae, etc.)
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Special Issue Information

Dear Colleagues,

The treatment of wastewater with activated sludge, known as a conventional biological treatment, has been widely developed. However, the removal efficiency is very low for biorecalcitrant compounds such as dyes, residues of drugs, pesticides, and hydrocarbons. Furthermore, novel processes must be developed and energy consumption must be reduced in order to reduce the environmental footprint of these types of processes. Thus, several improvements are possible, for example, through the development of green catalysts in advanced oxidation processes or the use of biobased materials and green energy production residues such as biochar, which is formed through the pyrogasification of wood biomass. Another strategy is to combine wastewater treatment and energy bioproduction directly at wastewater treatment plant sites.

With the success of the previous Special Issue, "Application of Environmentally Friendly Technologies in Green Processes",  we decided to organize a second Special Issue on this subject. This Special Issue, "Application of Environmentally Friendly Technologies in Green Processes, 2nd Edition", aims to curate novel advances in the development and applications of green processes in the fields of wastewater treatment and organic micropollutants and their implications for the future.

Topics of interest include, but are not limited to, the following:

  • The development of new green catalysts;
  • Improvements in biological treatment;
  • The production of bioenergy combined with wastewater treatment;
  • Biobased materials in wastewater treatment.

Prof. Dr. Hayet Djelal
Guest Editor

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Keywords

  • environmentally friendly processing
  • wastewater
  • advanced oxidation processes
  • biological processes
  • phytoremediation processes
  • green catalysts
  • biochar
  • biobased materials
  • bioenergy
  • energy efficiency

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Published Papers (1 paper)

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Research

24 pages, 4061 KiB  
Article
Continuous Fixed Bed Bioreactor for the Degradation of Textile Dyes: Phytotoxicity Assessment
by Sonia Cherif, Hynda Rezzaz-Yazid, Salima Ayachine, Imene Toukal, Noreddine Boudechiche, Mohamed Belmedani, Hayet Djelal and Zahra Sadaoui
Processes 2024, 12(10), 2222; https://doi.org/10.3390/pr12102222 - 11 Oct 2024
Viewed by 321
Abstract
This study explores a novel bioremediation approach using a continuous upflow fixed bed bioreactor with date pedicels as a biosupport material. Date pedicels offer a dual advantage: providing microbial support and potentially acting as a biostimulant due to their inherent nutrients. This research [...] Read more.
This study explores a novel bioremediation approach using a continuous upflow fixed bed bioreactor with date pedicels as a biosupport material. Date pedicels offer a dual advantage: providing microbial support and potentially acting as a biostimulant due to their inherent nutrients. This research is divided into two phases: with and without microbial introduction. The bioreactor’s efficiency in removing two common textile dyes, RB19 and DR227, was evaluated under various conditions: fixed bed high, the effect of the initial concentration of the pollutant, and recycling the RB19 solution within the bioreactor. Optimization studies revealed an 83% removal yield of RB19 dye with an initial pollutant concentration of 100 mg·L−1 using activated sludge as inoculum. The bioreactor developed its own bacterial consortium without initial inoculation. Microscopic analysis confirmed the presence of a diverse microbial community, including protozoa (Aspidisca and Paramecium), nematodes, and diatoms. The bioreactor exhibited efficient removal of RB19 across a range of initial concentrations (20–100 mg/L) with similar removal efficiencies (around 65%). Interestingly, the removal efficiency for DR227 was concentration-dependent. The bioreactor demonstrated the ability to enhance the biodegradability of treated RB19 solutions. Phytotoxicity tests using watercress and lettuce seeds revealed no negative impacts on plant growth. SEM and FTIR analyses were conducted to examine the biosupport material before and after biotreatment. Full article
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