Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation

The present study reports significant improvements in the removal of ammoniacal nitrogen from wastewater which is an important problem for many industries such as dyes and pigment, distilleries and fisheries. Pilot plant studies (capacity, 1 m(3)/h) on synthetic wastewater using 4-amino phenol as mo...

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Autores principales: Patil, Pravin B., Bhandari, Vinay M., Ranade, Vivek V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7786615/
https://www.ncbi.nlm.nih.gov/pubmed/32795930
http://dx.doi.org/10.1016/j.ultsonch.2020.105306
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author Patil, Pravin B.
Bhandari, Vinay M.
Ranade, Vivek V.
author_facet Patil, Pravin B.
Bhandari, Vinay M.
Ranade, Vivek V.
author_sort Patil, Pravin B.
collection PubMed
description The present study reports significant improvements in the removal of ammoniacal nitrogen from wastewater which is an important problem for many industries such as dyes and pigment, distilleries and fisheries. Pilot plant studies (capacity, 1 m(3)/h) on synthetic wastewater using 4-amino phenol as model nitrogen containing organic compound and two real industrial effluents of high ammoniacal nitrogen content were carried out using hydrodynamic cavitation. Two reactor geometries were evaluated for increased efficiency in removal-orifice and vortex diode. Effect of initial concentration (100–500 mg/L), effect of pressure drop (0.5–5 bar) and nature of cavitating device (linear and vortex flow for cavitation) were evaluated along with effect of salt content, effect of hydrogen peroxide addition and aeration. Initial concentration was found to have significant impact on the extent of removal: ~ 5 g/m(3) removal for initial concentration of 100 mg/L and up to 12 g/m(3) removal at high concentration of 500 mg/L. Interestingly, significant improvement of the order of magnitude (up to 8 times) in removal of ammoniacal nitrogen could be obtained by sparging air or oxygen in hydrodynamic cavitation and a very high removal of above 80% could be achieved. The removal of ammoniacal nitrogen by vortex diode was also found to be effective in the industrial wastewaters and results on two different effluent samples of distillery industry indicated up to 75% removal, though with longer time of treatment compared to that of synthetic wastewater. The developed methodology of hydrodynamic cavitation technology with aeration and vortex diode as a cavitating device was found to be highly effective for improving the efficiency of the conventional cavitation methods and hence can be highly useful in industrial wastewater treatment, specifically for the removal of ammoniacal nitrogen.
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spelling pubmed-77866152021-01-06 Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation Patil, Pravin B. Bhandari, Vinay M. Ranade, Vivek V. Ultrason Sonochem Original Research Article The present study reports significant improvements in the removal of ammoniacal nitrogen from wastewater which is an important problem for many industries such as dyes and pigment, distilleries and fisheries. Pilot plant studies (capacity, 1 m(3)/h) on synthetic wastewater using 4-amino phenol as model nitrogen containing organic compound and two real industrial effluents of high ammoniacal nitrogen content were carried out using hydrodynamic cavitation. Two reactor geometries were evaluated for increased efficiency in removal-orifice and vortex diode. Effect of initial concentration (100–500 mg/L), effect of pressure drop (0.5–5 bar) and nature of cavitating device (linear and vortex flow for cavitation) were evaluated along with effect of salt content, effect of hydrogen peroxide addition and aeration. Initial concentration was found to have significant impact on the extent of removal: ~ 5 g/m(3) removal for initial concentration of 100 mg/L and up to 12 g/m(3) removal at high concentration of 500 mg/L. Interestingly, significant improvement of the order of magnitude (up to 8 times) in removal of ammoniacal nitrogen could be obtained by sparging air or oxygen in hydrodynamic cavitation and a very high removal of above 80% could be achieved. The removal of ammoniacal nitrogen by vortex diode was also found to be effective in the industrial wastewaters and results on two different effluent samples of distillery industry indicated up to 75% removal, though with longer time of treatment compared to that of synthetic wastewater. The developed methodology of hydrodynamic cavitation technology with aeration and vortex diode as a cavitating device was found to be highly effective for improving the efficiency of the conventional cavitation methods and hence can be highly useful in industrial wastewater treatment, specifically for the removal of ammoniacal nitrogen. Elsevier 2020-08-09 /pmc/articles/PMC7786615/ /pubmed/32795930 http://dx.doi.org/10.1016/j.ultsonch.2020.105306 Text en © 2020 Elsevier B.V. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Research Article
Patil, Pravin B.
Bhandari, Vinay M.
Ranade, Vivek V.
Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation
title Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation
title_full Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation
title_fullStr Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation
title_full_unstemmed Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation
title_short Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation
title_sort improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation
topic Original Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7786615/
https://www.ncbi.nlm.nih.gov/pubmed/32795930
http://dx.doi.org/10.1016/j.ultsonch.2020.105306
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