Printing ink wastewater treatment using combined hydrodynamic cavitation and pH fixation

Charikleia Zampeta; Foteini Arvanitaki; Zacharias Frontistis; Nikolina Charalampous; Stefanos Dailianis; P G Koutsoukos; Dimitris V Vayenas

doi:10.1016/j.jenvman.2022.115404

Printing ink wastewater treatment using combined hydrodynamic cavitation and pH fixation

J Environ Manage. 2022 Sep 1:317:115404. doi: 10.1016/j.jenvman.2022.115404. Epub 2022 May 27.

Authors

Charikleia Zampeta¹, Foteini Arvanitaki¹, Zacharias Frontistis², Nikolina Charalampous³, Stefanos Dailianis³, P G Koutsoukos⁴, Dimitris V Vayenas⁵

Affiliations

¹ Department of Chemical Engineering, University of Patras, Rio, GR-26504, Patras, Greece.
² Department of Chemical Engineering, University of Western Macedonia, GR-50100, Kozani, Greece.
³ Department of Biology, Section of Animal Biology, School of Natural Sciences, University of Patras, GR-26500, Patras, Greece.
⁴ Department of Chemical Engineering, University of Patras, Rio, GR-26504, Patras, Greece; Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ ICE-HT), Stadiou Str., Platani, GR-26504, Patras, Greece.
⁵ Department of Chemical Engineering, University of Patras, Rio, GR-26504, Patras, Greece; Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ ICE-HT), Stadiou Str., Platani, GR-26504, Patras, Greece. Electronic address: dvagenas@upatras.gr.

PMID: 35636103
DOI: 10.1016/j.jenvman.2022.115404

Abstract

Printing ink wastewater (PIW) carries a heavy load of pollutants, the composition of which makes treatment difficult, especially when trying to minimize the pollution load. According to the latter, the present study aims to investigate PIW treatment with different various methods and to determine the maximum color, COD (chemical oxygen demand) and TSS (total suspended solids) removal. First, hydrodynamic cavitation (HC) was tested and the effect of hydrogen peroxide dosage (0-10 g L^-1), and pH (3, 5, 8, 10) was examined concerning the removal of PIW initial COD concentrations 4000 and 8000 mg L^-1. Removal was high (more than 81%) only at pH 5 in HC reactor. The second method involved treatment with separate pH fixation of the undiluted PIW (COD 17000 mg L^-1, actual pH 8 ± 0.2). This treatment, maximized removals, reaching reduction of the initial values more than 91%, at pH 5. Finally, PIW was treated with a combination of the above methods, leading to 93-97% removals for 8000 mg L^-1 PIW treatment and 97-99% for 17000 mg L^-1 PIW respectively. Process cost calculations showed that the latter method is an effective and affordable treatment method for PIW streams, while toxicity tests of the treated PIW showed substantial toxicity reduction.

Keywords: Combined method; Hydrodynamic cavitation; Printing ink wastewater treatment; Toxicity tests; pH fixation.

MeSH terms

Hydrodynamics
Hydrogen Peroxide / chemistry
Hydrogen-Ion Concentration
Ink*
Waste Disposal, Fluid / methods
Wastewater
Water Pollutants, Chemical*
Water Purification* / methods

Substances

Waste Water
Water Pollutants, Chemical
Hydrogen Peroxide