Wastewater treatment and process intensification for degradation of solvents using hydrodynamic cavitation

Pravin B. Patil; Vinay M. Bhandari; Vivek V. Ranade

doi:10.1016/j.cep.2021.108485

Wastewater treatment and process intensification for degradation of solvents using hydrodynamic cavitation

Pravin B. Patil, Vinay M. Bhandari^*, Vivek V. Ranade

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

Industrial wastewater treatment for removal of small concentrations of harmful solvents is pertinent issue in many chemical and pharmaceutical industries. The present work evaluates removal of three common solvents by hydrodynamic cavitation (nominal capacity, 1m³/h). Solvent degradation of three solvents viz. octanol, dimethyl formamide and cyclohexanol was studied in the concentration range of 50-200 mg/L and for the pressure drop range of 0.5-5 bar. The vortex based cavitation device (vortex diode) was compared with that of linear flow based device (orifice). Process intensification in the form of aeration and addition oxidizing agent- hydrogen peroxide was also evaluated for synergistic effect. The vortex diode required lower pressure drop and is superior to orifice and process intensification using aeration is most effective. A reduction in TOC to the extent of 74% could be achieved for octanol (200 ppm) using aeration with cavitational yield of 1202×10⁻⁴ mg/J for vortex diode, yield ~10 times of orifice. The degradation depends on the nature of solvent and it was revealed that low values of dielectric constant (ε<10) favour degradation. The kinetics was evaluated using rate model based on per-pass degradation factor. The process techno-economic feasibility is useful in industrial wastewater treatment.

Original language	English
Article number	108485
Number of pages	10
Journal	Chemical Engineering and Processing - Process Intensification
Volume	166
Early online date	01 Jun 2021
DOIs	https://doi.org/10.1016/j.cep.2021.108485
Publication status	Published - Sept 2021
Externally published	Yes

Bibliographical note

Funding Information:
The author-VMB wishes to acknowledge the financial support from Water Innovation Center- Technology, Research and Education (WICTRE) (DST/TM/WTI/WIC/2K17/100(G)), (GAP-326626) of Department of Science and technology, The Ministry of Science and Technology India. Mr. Pravin Patil would like to acknowledge fellowship of Council of Scientific and Industrial Research (CSIR), Government of India.

Publisher Copyright:
© 2021 Elsevier B.V.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

Cavitation
Effluent
Organics removal
Oxidation
Pollution

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Energy Engineering and Power Technology
Industrial and Manufacturing Engineering

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Cite this

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title = "Wastewater treatment and process intensification for degradation of solvents using hydrodynamic cavitation",

abstract = "Industrial wastewater treatment for removal of small concentrations of harmful solvents is pertinent issue in many chemical and pharmaceutical industries. The present work evaluates removal of three common solvents by hydrodynamic cavitation (nominal capacity, 1m3/h). Solvent degradation of three solvents viz. octanol, dimethyl formamide and cyclohexanol was studied in the concentration range of 50-200 mg/L and for the pressure drop range of 0.5-5 bar. The vortex based cavitation device (vortex diode) was compared with that of linear flow based device (orifice). Process intensification in the form of aeration and addition oxidizing agent- hydrogen peroxide was also evaluated for synergistic effect. The vortex diode required lower pressure drop and is superior to orifice and process intensification using aeration is most effective. A reduction in TOC to the extent of 74% could be achieved for octanol (200 ppm) using aeration with cavitational yield of 1202×10−4 mg/J for vortex diode, yield ~10 times of orifice. The degradation depends on the nature of solvent and it was revealed that low values of dielectric constant (ε<10) favour degradation. The kinetics was evaluated using rate model based on per-pass degradation factor. The process techno-economic feasibility is useful in industrial wastewater treatment.",

keywords = "Cavitation, Effluent, Organics removal, Oxidation, Pollution",

author = "Patil, {Pravin B.} and Bhandari, {Vinay M.} and Ranade, {Vivek V.}",

note = "Funding Information: The author-VMB wishes to acknowledge the financial support from Water Innovation Center- Technology, Research and Education (WICTRE) (DST/TM/WTI/WIC/2K17/100(G)), (GAP-326626) of Department of Science and technology, The Ministry of Science and Technology India. Mr. Pravin Patil would like to acknowledge fellowship of Council of Scientific and Industrial Research (CSIR), Government of India. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

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doi = "10.1016/j.cep.2021.108485",

language = "English",

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journal = "Chemical Engineering and Processing - Process Intensification",

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AU - Patil, Pravin B.

AU - Bhandari, Vinay M.

AU - Ranade, Vivek V.

N1 - Funding Information: The author-VMB wishes to acknowledge the financial support from Water Innovation Center- Technology, Research and Education (WICTRE) (DST/TM/WTI/WIC/2K17/100(G)), (GAP-326626) of Department of Science and technology, The Ministry of Science and Technology India. Mr. Pravin Patil would like to acknowledge fellowship of Council of Scientific and Industrial Research (CSIR), Government of India. Publisher Copyright: © 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/9

Y1 - 2021/9

N2 - Industrial wastewater treatment for removal of small concentrations of harmful solvents is pertinent issue in many chemical and pharmaceutical industries. The present work evaluates removal of three common solvents by hydrodynamic cavitation (nominal capacity, 1m3/h). Solvent degradation of three solvents viz. octanol, dimethyl formamide and cyclohexanol was studied in the concentration range of 50-200 mg/L and for the pressure drop range of 0.5-5 bar. The vortex based cavitation device (vortex diode) was compared with that of linear flow based device (orifice). Process intensification in the form of aeration and addition oxidizing agent- hydrogen peroxide was also evaluated for synergistic effect. The vortex diode required lower pressure drop and is superior to orifice and process intensification using aeration is most effective. A reduction in TOC to the extent of 74% could be achieved for octanol (200 ppm) using aeration with cavitational yield of 1202×10−4 mg/J for vortex diode, yield ~10 times of orifice. The degradation depends on the nature of solvent and it was revealed that low values of dielectric constant (ε<10) favour degradation. The kinetics was evaluated using rate model based on per-pass degradation factor. The process techno-economic feasibility is useful in industrial wastewater treatment.

AB - Industrial wastewater treatment for removal of small concentrations of harmful solvents is pertinent issue in many chemical and pharmaceutical industries. The present work evaluates removal of three common solvents by hydrodynamic cavitation (nominal capacity, 1m3/h). Solvent degradation of three solvents viz. octanol, dimethyl formamide and cyclohexanol was studied in the concentration range of 50-200 mg/L and for the pressure drop range of 0.5-5 bar. The vortex based cavitation device (vortex diode) was compared with that of linear flow based device (orifice). Process intensification in the form of aeration and addition oxidizing agent- hydrogen peroxide was also evaluated for synergistic effect. The vortex diode required lower pressure drop and is superior to orifice and process intensification using aeration is most effective. A reduction in TOC to the extent of 74% could be achieved for octanol (200 ppm) using aeration with cavitational yield of 1202×10−4 mg/J for vortex diode, yield ~10 times of orifice. The degradation depends on the nature of solvent and it was revealed that low values of dielectric constant (ε<10) favour degradation. The kinetics was evaluated using rate model based on per-pass degradation factor. The process techno-economic feasibility is useful in industrial wastewater treatment.

KW - Cavitation

KW - Effluent

KW - Organics removal

KW - Oxidation

KW - Pollution

U2 - 10.1016/j.cep.2021.108485

DO - 10.1016/j.cep.2021.108485

M3 - Article

AN - SCOPUS:85107675083

SN - 0255-2701

VL - 166

JO - Chemical Engineering and Processing - Process Intensification

JF - Chemical Engineering and Processing - Process Intensification

M1 - 108485

ER -

Wastewater treatment and process intensification for degradation of solvents using hydrodynamic cavitation

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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