HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS

HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS

Cavitation is an advanced oxidation process which consists in the formation and subsequent growing and implosion of cavities. The process generates large amounts of energy in a short period of time. Cavitation reactors constitute a widespread application in the area of chemical processing, water and effluent treatment and biotechnologies. The objective of this research was to investigate the effects of hydrodynamic cavitation caused by the use of a high speed homogenizer with an optimized flow rate, operating in continuous mode, in the disinfection of water containing high concentrations of total coliforms (19.33 x 105 MNP/100mL) and Escherichia coli (46.26 x 104 MNP/100ml). The raw water samples were collected and treated in 3 minutes interval, monitoring pressure, temperature, physico-chemical and microbiological parameters, following the general guidelines of Standard Methods for Examination of Water and Wastewater. Results show that the optimization of water flow supplied to the homogenizer has a direct influence in the time necessary to stabilize the boiling water temperature. Hence, cavitation constitutes a promising technology for treating drinking water supplies. Cavitation reduces contaminants concentration, highlighting the decrease achieved for nitrites and nitrates and the complete microorganisms inactivation (total coliforms and Escherichia coli), even for different and high initial concentrations, regardless of the chemical disinfection.   Key Words: Disinfection; Advanced oxidation process; Hydrodynamic cavitation.

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Main Authors: Fares Abdala Neto, Eliezer, Dantas de Aquino, Marisete, Colzi Lopes, Alexandre, D. Aquino, Arislete
Format: Digital revista
Language:spa
Published: Instituto de Ingeniería, Universidad Nacional Autónoma de México 2013
Online Access:https://www.revistas.unam.mx/index.php/aidis/article/view/36961
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institution UNAM MX
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country México
countrycode MX
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databasecode rev-aidis-mx
tag revista
region America del Norte
libraryname Biblioteca de Instituto de Ingeniería de la UNAM de México
language spa
format Digital
author Fares Abdala Neto, Eliezer
Dantas de Aquino, Marisete
Colzi Lopes, Alexandre
D. Aquino, Arislete
spellingShingle Fares Abdala Neto, Eliezer
Dantas de Aquino, Marisete
Colzi Lopes, Alexandre
D. Aquino, Arislete
HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS
author_facet Fares Abdala Neto, Eliezer
Dantas de Aquino, Marisete
Colzi Lopes, Alexandre
D. Aquino, Arislete
author_sort Fares Abdala Neto, Eliezer
title HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS
title_short HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS
title_full HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS
title_fullStr HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS
title_full_unstemmed HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS
title_sort hydrodynamic cavitation to treat water with high concentration of microbiological contamination indicators
description Cavitation is an advanced oxidation process which consists in the formation and subsequent growing and implosion of cavities. The process generates large amounts of energy in a short period of time. Cavitation reactors constitute a widespread application in the area of chemical processing, water and effluent treatment and biotechnologies. The objective of this research was to investigate the effects of hydrodynamic cavitation caused by the use of a high speed homogenizer with an optimized flow rate, operating in continuous mode, in the disinfection of water containing high concentrations of total coliforms (19.33 x 105 MNP/100mL) and Escherichia coli (46.26 x 104 MNP/100ml). The raw water samples were collected and treated in 3 minutes interval, monitoring pressure, temperature, physico-chemical and microbiological parameters, following the general guidelines of Standard Methods for Examination of Water and Wastewater. Results show that the optimization of water flow supplied to the homogenizer has a direct influence in the time necessary to stabilize the boiling water temperature. Hence, cavitation constitutes a promising technology for treating drinking water supplies. Cavitation reduces contaminants concentration, highlighting the decrease achieved for nitrites and nitrates and the complete microorganisms inactivation (total coliforms and Escherichia coli), even for different and high initial concentrations, regardless of the chemical disinfection.   Key Words: Disinfection; Advanced oxidation process; Hydrodynamic cavitation.
publisher Instituto de Ingeniería, Universidad Nacional Autónoma de México
publishDate 2013
url https://www.revistas.unam.mx/index.php/aidis/article/view/36961
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spelling rev-aidis-mx-article-369612022-11-11T18:33:59Z HYDRODYNAMIC CAVITATION TO TREAT WATER WITH HIGH CONCENTRATION OF MICROBIOLOGICAL CONTAMINATION INDICATORS CAVITAÇÃO HIDRODINÂMICA APLICADA AO TRATAMENTO DE ÁGUA COM ALTA CONCENTRAÇÃO DE INDICADORES DE CONTAMINAÇÃO MICROBIOLÓGICA Fares Abdala Neto, Eliezer Dantas de Aquino, Marisete Colzi Lopes, Alexandre D. Aquino, Arislete Desinfecção Processo oxidativo avançado Cavitação hidrodinâmica. Cavitation is an advanced oxidation process which consists in the formation and subsequent growing and implosion of cavities. The process generates large amounts of energy in a short period of time. Cavitation reactors constitute a widespread application in the area of chemical processing, water and effluent treatment and biotechnologies. The objective of this research was to investigate the effects of hydrodynamic cavitation caused by the use of a high speed homogenizer with an optimized flow rate, operating in continuous mode, in the disinfection of water containing high concentrations of total coliforms (19.33 x 105 MNP/100mL) and Escherichia coli (46.26 x 104 MNP/100ml). The raw water samples were collected and treated in 3 minutes interval, monitoring pressure, temperature, physico-chemical and microbiological parameters, following the general guidelines of Standard Methods for Examination of Water and Wastewater. Results show that the optimization of water flow supplied to the homogenizer has a direct influence in the time necessary to stabilize the boiling water temperature. Hence, cavitation constitutes a promising technology for treating drinking water supplies. Cavitation reduces contaminants concentration, highlighting the decrease achieved for nitrites and nitrates and the complete microorganisms inactivation (total coliforms and Escherichia coli), even for different and high initial concentrations, regardless of the chemical disinfection.   Key Words: Disinfection; Advanced oxidation process; Hydrodynamic cavitation. A cavitação se destaca como um processo oxidativo avançado caracterizada pela geração, subsequente crescimento e colapso de cavidades com elevada transferência de energia, em curto intervalo de tempo. Reatores de cavitação encontram ampla aplicação nas áreas de processamento químico, tratamento de água e efluentes e na biotecnologia, dentre outras. O objetivo da presente pesquisa foi de investigar os efeitos da cavitação hidrodinâmica provocado pelo o emprego de um homogeneizador de alta velocidade com vazão otimizada, operando em modo contínuo, na desinfecção de água contendo elevada concentração de coliformes totais (19.33 x 105 NMP/100mL) e Escherichia coli (46.26 x 104 NMP/100mL). As amostras de água bruta e tratada foram coletas em intervalos de 3 minutos, monitorando pressão, temperatura, parámetros físico-químicos e exames microbiológicos, seguindo as diretrizes gerais do Standard Methods for Examination of Water and Wastewater. O homogeneizador de alta velocidade, nas condições experimentadas, operando com 7900 rpm a uma vazão de 60 L/h, se apresenta como uma tecnologia promissora para o tratamento de água para abastecimento, pois foi capaz de reduzir concentrações de parâmetros físico-químicos com destaque para nitritos, dureza total, carbonatos e ferro, bem como a inativação completa dos microrganismos estudados (coliformes totais e Escherichia coli), mesmo para diferentes e elevadas concentrações iniciais, independente de desinfecções químicas.   Palavras Chave: Desinfecção; Processo oxidativo avançado; Cavitação hidrodinâmica. Instituto de Ingeniería, Universidad Nacional Autónoma de México 2013-04-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículos evaluados por pares Artículos evaluados por pares Artículos evaluados por pares application/pdf https://www.revistas.unam.mx/index.php/aidis/article/view/36961 Revista AIDIS de Ingeniería y Ciencias Ambientales. Investigación, desarrollo y práctica; Vol. 6, No. 1, 6 de Abril de 2013; 12 - 20 Revista AIDIS de Ingeniería y Ciencias Ambientales. Investigación, desarrollo y práctica; Vol. 6, No. 1, 6 de Abril de 2013; 12 - 20 Revista AIDIS de Ingeniería y Ciencias Ambientales. Investigación, desarrollo y práctica; Vol. 6, No. 1, 6 de Abril de 2013; 12 - 20 0718-378X spa https://www.revistas.unam.mx/index.php/aidis/article/view/36961/33490

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