Intensified and Innovative Bio/Chemical/Physical Processes for the Degradation of Organic Pollutants in Wastewaters

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: closed (20 November 2021)

Special Issue Editors


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Guest Editor
Department of Chemical Engineering Materials Environment, Sapienza University of Rome, Rome, Italy
Interests: process intensification; methanation; P2G; exergy; industrial and environmental catalysis; nano-catalysts production; adsorption; plant units design and modeling; process development and scale-up; dynamic modeling; wastewater treatment
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Co-Guest Editor
Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, Poland
Interests: cavitation based advanced oxidation processes (AOPs); cavitation based technologies
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The development of innovative wastewater treatment processes is considered a fundamental task for various researchers and companies, since the re-utilization of wastewater in the same process that has generated it is one of the pillars of a circular economy. The process of intensification may allow maximizing the process performances by means of innovative equipment or particular operative conditions. For instance, various biological/chemical and physical treatments can be intensified by optimizing the fluid dynamics conditions established in the used reactor. A number of innovative treatment processes have been developed in the last decades, taking advantage of different energy sources and phenomena (cavitation, microwaves, ultrasounds, etc.) or by means of nano-photo/catalysts, such as iron-based, zinc-based, and titanium-based nanoparticles.

In this Special Issue, interested researchers are invited to submit original research papers, as well as review articles, on any topic related to the intensification of well-known biological/chemical or physical wastewater treatment or related to the development of innovative treatment processes, focusing on organic pollutant degradation/removal. The studies should report the experimental data modelling and/or possible equipment modelling for industrial scale-up of the proposed technology.

Dr. Giorgio Vilardi
Prof. Dr. Grzegorz Boczkaj
Guest Editors

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Keywords

  • Process intensification
  • Cavitation
  • Biochemical degradation
  • Innovative treatment
  • Heterogeneous catalysis
  • Micro-mixing
  • Reactor scale-up
  • Microwaves
  • Ultrasounds

Published Papers (2 papers)

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Research

17 pages, 3605 KiB  
Article
Intensification of Dihydroxybenzenes Degradation over Immobilized TiO2 Based Photocatalysts under Simulated Solar Light
by Szymon Malinowski, Ivana Presečki, Igor Jajčinović, Ivan Brnardić, Vilko Mandić and Ivana Grčić
Appl. Sci. 2020, 10(21), 7571; https://doi.org/10.3390/app10217571 - 27 Oct 2020
Cited by 11 | Viewed by 1813
Abstract
The work is focused on the assessment of possible methods for intensification of photocatalytic degradation of common water borne pollutants. Solar photocatalysis poses certain limitations for large scale application with several possible reactor designs which have shown an optimal performance. In the current [...] Read more.
The work is focused on the assessment of possible methods for intensification of photocatalytic degradation of common water borne pollutants. Solar photocatalysis poses certain limitations for large scale application with several possible reactor designs which have shown an optimal performance. In the current study, a comparison between two types of pilot scale reactors was made: a flat-plate cascade reactor (FPCR) and tubular reactor with a compound parabolic collector (CPC). Apart from the reactor design, another aspect of possible intensification was a photocatalyst formulation. The efficiency of photocatalytic films that consisted of pure TiO2 nanoparticles was compared to the efficiency of films that consisted of TiO2/CNT composites. Intensification assessment was performed via detailed kinetic modelling, combining the optical properties of films, irradiation conditions and reactor mass balance. Intensification was expressed via intensification indices. Results showed the advantage of the CPC-based reactor design and an unbiased effect of sensitizing agent (CNT) in the photocatalytic film formulation. Full article
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13 pages, 1055 KiB  
Article
A Rapid Experimental Procedure to Assess Environmental Compatibility of Conditioning Mixtures Used in TBM-EPB Technology
by Irene Bavasso, Giorgio Vilardi, Diego Sebastiani, Anita Di Giulio, Marta Di Felice, Andrea Di Biase, Salvatore Miliziano and Luca Di Palma
Appl. Sci. 2020, 10(12), 4138; https://doi.org/10.3390/app10124138 - 16 Jun 2020
Cited by 3 | Viewed by 2020
Abstract
Earth Pressure Balance (EPB) Tunnel Boring Machines (TBM) are currently the most widely used machines to perform tunnel excavation, particularly in urban areas. This technology involves the injection of chemicals as conditioning mixtures, which commonly raises concerns limiting the reuse of soils after [...] Read more.
Earth Pressure Balance (EPB) Tunnel Boring Machines (TBM) are currently the most widely used machines to perform tunnel excavation, particularly in urban areas. This technology involves the injection of chemicals as conditioning mixtures, which commonly raises concerns limiting the reuse of soils after excavation. This study deals with the prospect of a simplified, rapid and replicable methodology for the evaluation of the biodegradability of these conditioning mixtures. For this purpose, the biodegradation of three commercial conditioning mixtures was investigated in closed bottle tests by investigating the effect of different mixtures dosages and two different inocula (soil humus and Bacillus Clausii). While using soil humus as inoculum, a comparative study of biodegradation of the three investigated mixtures was successfully carried out; in the case of Bacillus Clausii, it was not possible to make a comparison between the different formulations in a short time. The adoption of soil humus satisfied only the criteria of rapid test, while the Bacillus Clausii, as specific inoculum, can meet the criteria of replicable results. For this reason, in the second part of this experimental study, a rapid and replicable procedure was proposed and validated. A kinetic study of organic carbon removal was also carried out. Full article
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