scholarly journals Application of O3 and O3 /H2O2 for post-treatment of horizontal-flow anaerobic immobilized biomass (HAIB) effluent, treating hospital wastewater.

Inge CUC ◽  
2021 ◽  
Vol 17 (2) ◽  
Author(s):  
Tatiana Rodriguez ◽  
Juan Gabriel Rueda-Bayona
Keyword(s):  
Advanced Oxidation Processes ◽  
Flow Reactor ◽  
Advanced Oxidation ◽  
Appropriate Technology ◽  
Post Treatment ◽  
Horizontal Flow ◽  
Biological Processes ◽  
Oxidation Processes ◽  
Recalcitrant Compounds ◽  
Immobilized Biomass

Introduction: In recent years, the "emerging pollutants" in urban, industrial, and surface water bodies have called the attention worldwide.  In many cases, these substances correspond to pollutants that have not been yet regulated by the environmental authorities. Hospitals are considered the main source of these contaminants as a result of different activities.  However, there is no consensus about the appropriate treatments for removing this kind of pollutants in the wastewaters; independent conventional biological processes do not reach the desirable values of discharge limits. Advanced oxidation processes (AOP) are known as an appropriate technology, not only to improve the biodegradability of recalcitrant compounds, but also to contribute to the removal of certain substances that are difficult to treat during the biological process.   Objective: Thus, this study evaluated the application of O3z and O3 /H2O2 to the effluent of an anaerobic horizontal flow reactor and immobilized biomass (HAIB). Methodology: The oxidizers were applied in a lab-scale batch borosilicate glass reactor. The reaction time was 60 min and samples were taken at intervals of 15 min. Parameters such as absorbance at UV254, biodegradability ratio expressed as COD/BOD5, and color as VIS436 were measured. All samples were analyzed in duplicate. Results. The results showed that the application of Ozone and O3/H2O2 results in an increase in the biodegradability of 25% and 67% respectively. Concerning color, an efficiency of 85 % for Ozone and 100 % for O3 /H2O2 was observed. Besides, the AOPs applied also showed their effectiveness in removing aromatic organics, removing 40 to 50% of UV254. Conclusions: Finally, it is important to mention that the application of advanced oxidation processes as a post-treatment of anaerobic effluents increases biodegradability mainly due to the transformation suffered by recalcitrant compounds.

scholarly journals Advanced oxidation processes for recalcitrant compounds removal comparison with biofiltration by Corbicula fluminea

2020 ◽  
Vol 6 ◽  
pp. 666-671
Author(s):  
João Gomes ◽  
Eva Domingues ◽  
Marta Gmurek ◽  
Rosa M. Quinta-Ferreira ◽  
Rui C. Martins
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Corbicula Fluminea ◽  
Oxidation Processes ◽  
Recalcitrant Compounds

scholarly journals Electrochemical Technologies to Decrease the Chemical Risk of Hospital Wastewater and Urine

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6813
Author(s):  
Ángela Moratalla ◽  
Salvador Cotillas ◽  
Engracia Lacasa ◽  
Pablo Cañizares ◽  
Manuel A. Rodrigo ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Environmental Risks ◽  
Aquatic Environments ◽  
Biological Processes ◽  
Hospital Wastewater ◽  
Oxidation Processes ◽  
Electrochemical Advanced Oxidation Processes ◽  
Current State ◽  
Hospital Effluents

The inefficiency of conventional biological processes to remove pharmaceutical compounds (PhCs) in wastewater is leading to their accumulation in aquatic environments. These compounds are characterized by high toxicity, high antibiotic activity and low biodegradability, and their presence is causing serious environmental risks. Because much of the PhCs consumed by humans are excreted in the urine, hospital effluents have been considered one of the main routes of entry of PhCs into the environment. In this work, a critical review of the technologies employed for the removal of PhCs in hospital wastewater was carried out. This review provides an overview of the current state of the developed technologies for decreasing the chemical risks associated with the presence of PhCs in hospital wastewater or urine in the last years, including conventional treatments (filtration, adsorption, or biological processes), advanced oxidation processes (AOPs) and electrochemical advanced oxidation processes (EAOPs).

Decolorization of Simulated Dye Wastewater by High Energy Electron Beam Irradiation with Fe(II) Addition

1998 ◽  
Vol 3 (1) ◽  
Author(s):  
Charles N. Kurucz ◽  
Huren An ◽  
Jason Greene ◽  
Thomas D. Waite ◽  
William J. Cooper
Keyword(s):  
Electron Beam ◽  
Advanced Oxidation Processes ◽  
Electron Beam Irradiation ◽  
Advanced Oxidation ◽  
High Energy ◽  
Biological Processes ◽  
Dye Wastewater ◽  
High Energy Electron ◽  
Beam Irradiation ◽  
Oxidation Processes

AbstractDye wastewaters generally contain highly colored refractory organic chemicals. Traditional biological processes have proven inefficient in the removal of commercial dyes; however, advanced oxidation processes (AOPs), such as Fenton’s Reagent TiO

scholarly journals WO3/Buckypaper Membranes for Advanced Oxidation Processes

Membranes ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 157
Author(s):  
Giovanni De Filpo ◽  
Elvira Pantuso ◽  
Aleksander I. Mashin ◽  
Mariafrancesca Baratta ◽  
Fiore Pasquale Nicoletta
Keyword(s):  
Carbon Nanotubes ◽  
Advanced Oxidation Processes ◽  
Flow Reactor ◽  
Chemical Vapor ◽  
Advanced Oxidation ◽  
Composite Membranes ◽  
Thin Layers ◽  
Porous Polymer ◽  
Single Wall Carbon Nanotubes ◽  
Oxidation Processes

Photocatalytic materials, such as WO3, TiO2, and ZnO nanoparticles, are commonly linked onto porous polymer membranes for wastewater treatment, fouling mitigation and permeation enhancement. Buckypapers (BPs) are entanglements of carbon nanotubes, which have been recently proposed as innovative filtration systems thanks to their mechanical, electronic, and thermal properties. In this work, flexible membranes of single wall carbon nanotubes are prepared and characterized as efficient substrates to deposit by chemical vapor deposition thin layers of WO3 and obtain, in such a way, WO3/BP composite membranes for application in advanced oxidation processes. The photocatalytic efficiency of WO3/BP composite membranes is tested against model pollutants in a small continuous flow reactor and compared with the performance of an equivalent homogeneous WO3-based reactor.

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