Chemical Engineering. Master in Hydraulics and Sanitation. PhD in Environmental Engineering. Researcher on Water and Wastewater Treatment. Expert on Multiobjective Multicriteria Decision Analysis
Journal of Thermal Analysis and Calorimetry, Feb 15, 2011
Page 1. Effect of the irrigation with residual wastewaters on microbial soil activity of the orna... more Page 1. Effect of the irrigation with residual wastewaters on microbial soil activity of the ornamental flowers (Dahlia pinnata) cultures monitored by isothermal calorimetry Alexandre GS Prado Sheila M. Evangelista Jurandir ...
A microcalorimetric method was applied to study microbial soil activity of ornamental flower (Dahlia pinnata) plantations when irrigated with potable water and wastewaters. The samples were irrigated with potable water PW sample (reference) and treated wastewaters from Municipal Wastewater Treatment Station of Asa Norte in Brasilia City (Brazil). Three different water treatments were applied to irrigate soil samples, named TW1, TW2, and TW3 samples. The increase of the microbial soil activity observed in TW1 sample must have occurred because of the high amount of organic waste dissolved in wastewater used for irrigation. This rise indicates that the present treated wastewater can affect natural life cycle. However, only a low alteration in microbial soil activity was observed in the TW2 and TW3 samples, which suggests that these wastewater treatments can be normally used to irrigate soils without bringing environmental consequences, once they offer a great opportunity to upgrade
and protect the environment.
A falta de água em sistemas de abastecimento de água obriga a população a assumir comportamentos ... more A falta de água em sistemas de abastecimento de água obriga a população a assumir comportamentos de risco à saúde, o que é muito frequente em sistemas de abastecimento de água rural (SAA-rural). O objetivo desta pesquisa foi desenvolver e aplicar um modelo de otimização multiobjetivo para SAA-rural no município de Cuiabá, Estado de Mato Grosso, Brasil. A metodologia de pesquisa constou de: (1) formulação do modelo de otimização (MO); (2) aplicação do MO; (3) análise de resultados; e (4) implementação computacional do MO. Para resolução do problema, foi proposta e utilizada uma peça geradora de perda de carga. Constatou-se que o problema de falta de água pode ser resolvido por meio de pequenas modificações operacionais e estruturais. Foi desenvolvido um MO multiobjetivo para SAA-rural, baseado na técnica de Programação Não Linear Inteira Multiobjetivo (PNLIMO) implementado em ambiente OpenOffice.org. O MO foi aplicado a um caso real, apresentando resultados satisfatórios.
This work presents a compact plant's development and performance evaluation for the decentral... more This work presents a compact plant's development and performance evaluation for the decentralized treatment of domestic sewage. The plant was conceived and installed in a house with four residents in Vicente Pires, Federal District, Brazil. Its purpose was to remove organic matter and solids using a low-cost biological treatment process that was simple to operate. The plant was essentially anaerobic, composed of an up-flow anaerobic reactor and an anaerobic filter, both associated with lamella settlers. It was operated under real conditions and monitored for nineteen months, with removal efficiencies (calculated over the medians) of 81% for COD, 83% for BOD, 51% for Total Solids, 55% for Total Volatile Solids, 87% for Total Suspended Solids, and 100% for Settleable Solids. The plant performed adequately, with no clogging between the plates of the lamella settlers, no offensive odours, and limited amounts of sludge and scum.
Revista Eletrônica de Gestão e Tecnologias Ambientais, 2021
In the Federal District of Brazil, the cleaning waste from on-site sanitation facilities is trans... more In the Federal District of Brazil, the cleaning waste from on-site sanitation facilities is transported by septage trucks to sewage treatment plants (STPs) to be treated in conjunction with sewage. This research aimed to characterize the waste from septage trucks that were discharged in the two STPs in Brasilia, Federal District of Brazil. The methodology included the characterization (sampling and laboratory tests) of waste samples collected from septage trucks that discharged waste at the two STPs in Brasília, and the collection of information on the origin of this waste and the frequency of cleaning the on-site sanitation units. Great variability was found in the frequency of cleaning cesspools and septic tanks. The cleaning of the on-site sanitation facilities took place daily in some places and monthly in the remaining sites, and eventually, facilities with annual cleaning were reported. The characteristic that had the lowest variation coefficient was the pH. The presence of la...
The chaotic growth of cities results in numerous problems related to public health and urban envi... more The chaotic growth of cities results in numerous problems related to public health and urban environment. One of these problems is the urban water supply system crisis. This research aims to develop a mathematical model for urban water supply crises (UWC) able to deal with the ambiguity of the real available data. The applied methodology comprises the following steps: (i) identifying the influencing factors in UWC; (ii) proposing a conceptual model for the description of UWC; (iii) collecting and simulating the necessary and available data; (iv) optimizing the conceptual model parameters; and (v) verifying the proposed model performance. The results indicate that there are many influencing factors in UWC. The model developed comprises two parts or two sub-models. The first sub-model explains water consumption, and the second sub-model explains water availability. In the first sub-model, the functions are related to the factors that influence water consumption. In the second sub-mode...
A multicriterion methodology is used in the evaluation and selection of the most appropriate alte... more A multicriterion methodology is used in the evaluation and selection of the most appropriate alternative(s) for removing algae from stabilisation ponds effluents in a case study in Brasilia. For this purpose, five different natural treatment processes are tested at pilot scale: rock filter, sand filter, floating aquatic plants, constructed wetlands, and overland flow. These pilot units were constructed in Brasilia and set in parallel, each one receiving a portion of the effluent that comes from an existing wastewater treatment plant composed of preliminary treatment, UASB reactors, and high-rate stabilisation ponds. Several evaluation criteria are used in order to relate the capabilities of the post-treatment processes to the multiple objectives in this case. Two multicriterion decision-aid methods - compromise programming and ELECTRE-III - are used to select the most satisfying processes. The top ranking alternatives are indicated for subsequent studies, considering the possible im...
Paranoá: cadernos de arquitetura e urbanismo, 2013
A pesquisa realizada tem o objetivo de apresentar uma contribuição para o planejamento do enfrent... more A pesquisa realizada tem o objetivo de apresentar uma contribuição para o planejamento do enfrentamento de crise no abastecimento urbano de água (CAUA). Para isso foi proposta uma combinação de técnicas de inteligência artificial e metodologias multicriteriais de apoio à decisão (MCDA). Faz parte do escopo da pesquisa o desenvolvimento de ferramentas computacionais (software) para auxiliar o processo de tomada de decisão e a realização de um estudo de caso. Os resultados encontrados foram os seguintes: (i) o conhecimento de possíveis diretrizes de projeto para solução de casos de CAUA; (ii) o conhecimento de fatores influentes na CAUA; (iii) o desenvolvimento de um modelo híbrido de análise de decisão, denominado de CAUA-SAD, baseado nos princípios de similaridade vetorial, de sistemas baseados em conhecimento (sistemas especialistas) e no uso das MCDA. A avaliação da qualidade dos modelos desenvolvidos indicou uma concordância de 56%, e que melhorias nos modelos podem ser obtidas p...
O Distrito Federal (DF) possui 16 Estações de Tratamento de Esgotos (ETE) em operação, que empreg... more O Distrito Federal (DF) possui 16 Estações de Tratamento de Esgotos (ETE) em operação, que empregam tecnologias de tratamento diversificadas e geram diariamente cerca de 300 toneladas de lodo. A presente pesquisa objetivou a caracterização dos processos de produção e tratamento e da qualidade do lodo de esgotos gerado nas ETEs do DF, para identificar as alternativas de disposição final viáveis. Os coeficientes de produção de lodo foram verificados e comparados com a literatura, tendo-se deparado com a dificuldade em se estabelecer um padrão de geração de lodo para a fase de tratamento primário. Foram levantados os requisitos necessários à gestão do lodo, e, com a caracterização dos lodos das ETEs do DF, foi composto um cenário com alternativas que propiciam o aproveitamento do lodo. Concluiu-se que um tratamento complementar simples e de baixo custo para higienização do lodo permitiria sua adequação para o uso agrícola.
Purpose – The chaotic growth of cities results in numerous problems related to public health and ... more Purpose – The chaotic growth of cities results in numerous problems related to public health and urban environment. One of these problems is the crisis in urban water supply systems. The objective of this paper is to develop a mathematical model for the water supply system crisis in urban environment (WSC) able to tackle with the ambiguity of the real available data.Design/methodology/approach – The applied methodology comprises the following steps: (1) identification of the influencing factors in WSC; (2) proposal of a conceptual model for WSC description; (3) gathering and simulation of the necessary and available data; (4) optimization of the conceptual model parameters; and (5) verification of the proposed model performance.Findings – The results indicated that there is a great amount of influencing factors in WSC (showed in the complete text); the conceptual model that was developed is composed by two others partial models ( ). The first partial model explained the water consum...
A bibliographic survey on fish production by water reuse is presented. It is proposed a research ... more A bibliographic survey on fish production by water reuse is presented. It is proposed a research methodology to verifying the technical viability of fish production using effluents from wastewater treatment plants which employ serial stabilization lagoons systems in the Federal District, Brazil. Preliminary results obtained by using this proposed methodology are described. The first data permit to conclude that the best fish cultivation method is the policulture between Oreochromis niloticus and Hypophtalmychtis molitrix in ponds fed by treated sewage in stabilization lagoons on a pulsation mode.
Revista Eletrônica de Gestão e Tecnologias Ambientais
O objetivo desta pesquisa foi analisar a aplicabilidade dos processos para tratamento de esgotos ... more O objetivo desta pesquisa foi analisar a aplicabilidade dos processos para tratamento de esgotos de residências unifamiliares no Brasil e as condições em que estes seriam recomendados. Foi desenvolvida uma metodologia baseada nos métodos multiobjetivo ELECTRE-III e TOPSIS. Avaliaram-se os seguintes processos: (1) Tanque séptico; (2) Tanque séptico e filtro anaeróbio; (3) Tanque séptico e Wetland; (4) UASB e biofiltro aerado submerso (BAS); (5) Reator UASB e lodo ativado convencional; e (6) Tanque séptico e Reator Biológico de Membrana (MBR). Esses processos foram avaliados em três cenários: (1) lençol freático baixo, solo com alta permeabilidade e risco epidemiológico e ambiental pequeno; (2) lençol freático alto e/ou solo com infiltração baixa e risco epidemiológico e ambiental grande; e (3) reúso direto não-potável da água. Concluiu-se que, para o Cenário 1, a melhor alternativa é Tanque Séptico seguido ou não por filtro anaeróbio. Para o Cenário 2, é mais adequado empregar Tanque...
Ambiente e Agua - An Interdisciplinary Journal of Applied Science
Biological processes are the most widespread methods for wastewater treatment. However, they are ... more Biological processes are the most widespread methods for wastewater treatment. However, they are limited in their ability to degrade toxic and refractory pollutants, contaminants that electrochemical processes can remove. Therefore, this research explored the possibility of treating sewage by an anaerobic biological process followed by an aerobic system integrated to an electrolytic process. Three sequential batch reactors were operated in an automated way. Each of three reactors represented a process: aerobic biological treatment (BR); electrolytic treatment (ER); and a combination of both, the bio electrolytic reactor (BER). Two phases were ran with different electrodes: (Phase 1) stainless steel and (Phase 2) graphite. The electric current was varied from 0.001 to 0.100 A. COD, TS, SS, turbidity, and the zooplankton community were monitored. The highest organic matter removal efficiencies were 86%, 79% and 87% for BR, ER and BER, respectively. The best weekly BER efficiencies for...
Journal of Thermal Analysis and Calorimetry, Feb 15, 2011
Page 1. Effect of the irrigation with residual wastewaters on microbial soil activity of the orna... more Page 1. Effect of the irrigation with residual wastewaters on microbial soil activity of the ornamental flowers (Dahlia pinnata) cultures monitored by isothermal calorimetry Alexandre GS Prado Sheila M. Evangelista Jurandir ...
A microcalorimetric method was applied to study microbial soil activity of ornamental flower (Dahlia pinnata) plantations when irrigated with potable water and wastewaters. The samples were irrigated with potable water PW sample (reference) and treated wastewaters from Municipal Wastewater Treatment Station of Asa Norte in Brasilia City (Brazil). Three different water treatments were applied to irrigate soil samples, named TW1, TW2, and TW3 samples. The increase of the microbial soil activity observed in TW1 sample must have occurred because of the high amount of organic waste dissolved in wastewater used for irrigation. This rise indicates that the present treated wastewater can affect natural life cycle. However, only a low alteration in microbial soil activity was observed in the TW2 and TW3 samples, which suggests that these wastewater treatments can be normally used to irrigate soils without bringing environmental consequences, once they offer a great opportunity to upgrade
and protect the environment.
A falta de água em sistemas de abastecimento de água obriga a população a assumir comportamentos ... more A falta de água em sistemas de abastecimento de água obriga a população a assumir comportamentos de risco à saúde, o que é muito frequente em sistemas de abastecimento de água rural (SAA-rural). O objetivo desta pesquisa foi desenvolver e aplicar um modelo de otimização multiobjetivo para SAA-rural no município de Cuiabá, Estado de Mato Grosso, Brasil. A metodologia de pesquisa constou de: (1) formulação do modelo de otimização (MO); (2) aplicação do MO; (3) análise de resultados; e (4) implementação computacional do MO. Para resolução do problema, foi proposta e utilizada uma peça geradora de perda de carga. Constatou-se que o problema de falta de água pode ser resolvido por meio de pequenas modificações operacionais e estruturais. Foi desenvolvido um MO multiobjetivo para SAA-rural, baseado na técnica de Programação Não Linear Inteira Multiobjetivo (PNLIMO) implementado em ambiente OpenOffice.org. O MO foi aplicado a um caso real, apresentando resultados satisfatórios.
This work presents a compact plant's development and performance evaluation for the decentral... more This work presents a compact plant's development and performance evaluation for the decentralized treatment of domestic sewage. The plant was conceived and installed in a house with four residents in Vicente Pires, Federal District, Brazil. Its purpose was to remove organic matter and solids using a low-cost biological treatment process that was simple to operate. The plant was essentially anaerobic, composed of an up-flow anaerobic reactor and an anaerobic filter, both associated with lamella settlers. It was operated under real conditions and monitored for nineteen months, with removal efficiencies (calculated over the medians) of 81% for COD, 83% for BOD, 51% for Total Solids, 55% for Total Volatile Solids, 87% for Total Suspended Solids, and 100% for Settleable Solids. The plant performed adequately, with no clogging between the plates of the lamella settlers, no offensive odours, and limited amounts of sludge and scum.
Revista Eletrônica de Gestão e Tecnologias Ambientais, 2021
In the Federal District of Brazil, the cleaning waste from on-site sanitation facilities is trans... more In the Federal District of Brazil, the cleaning waste from on-site sanitation facilities is transported by septage trucks to sewage treatment plants (STPs) to be treated in conjunction with sewage. This research aimed to characterize the waste from septage trucks that were discharged in the two STPs in Brasilia, Federal District of Brazil. The methodology included the characterization (sampling and laboratory tests) of waste samples collected from septage trucks that discharged waste at the two STPs in Brasília, and the collection of information on the origin of this waste and the frequency of cleaning the on-site sanitation units. Great variability was found in the frequency of cleaning cesspools and septic tanks. The cleaning of the on-site sanitation facilities took place daily in some places and monthly in the remaining sites, and eventually, facilities with annual cleaning were reported. The characteristic that had the lowest variation coefficient was the pH. The presence of la...
The chaotic growth of cities results in numerous problems related to public health and urban envi... more The chaotic growth of cities results in numerous problems related to public health and urban environment. One of these problems is the urban water supply system crisis. This research aims to develop a mathematical model for urban water supply crises (UWC) able to deal with the ambiguity of the real available data. The applied methodology comprises the following steps: (i) identifying the influencing factors in UWC; (ii) proposing a conceptual model for the description of UWC; (iii) collecting and simulating the necessary and available data; (iv) optimizing the conceptual model parameters; and (v) verifying the proposed model performance. The results indicate that there are many influencing factors in UWC. The model developed comprises two parts or two sub-models. The first sub-model explains water consumption, and the second sub-model explains water availability. In the first sub-model, the functions are related to the factors that influence water consumption. In the second sub-mode...
A multicriterion methodology is used in the evaluation and selection of the most appropriate alte... more A multicriterion methodology is used in the evaluation and selection of the most appropriate alternative(s) for removing algae from stabilisation ponds effluents in a case study in Brasilia. For this purpose, five different natural treatment processes are tested at pilot scale: rock filter, sand filter, floating aquatic plants, constructed wetlands, and overland flow. These pilot units were constructed in Brasilia and set in parallel, each one receiving a portion of the effluent that comes from an existing wastewater treatment plant composed of preliminary treatment, UASB reactors, and high-rate stabilisation ponds. Several evaluation criteria are used in order to relate the capabilities of the post-treatment processes to the multiple objectives in this case. Two multicriterion decision-aid methods - compromise programming and ELECTRE-III - are used to select the most satisfying processes. The top ranking alternatives are indicated for subsequent studies, considering the possible im...
Paranoá: cadernos de arquitetura e urbanismo, 2013
A pesquisa realizada tem o objetivo de apresentar uma contribuição para o planejamento do enfrent... more A pesquisa realizada tem o objetivo de apresentar uma contribuição para o planejamento do enfrentamento de crise no abastecimento urbano de água (CAUA). Para isso foi proposta uma combinação de técnicas de inteligência artificial e metodologias multicriteriais de apoio à decisão (MCDA). Faz parte do escopo da pesquisa o desenvolvimento de ferramentas computacionais (software) para auxiliar o processo de tomada de decisão e a realização de um estudo de caso. Os resultados encontrados foram os seguintes: (i) o conhecimento de possíveis diretrizes de projeto para solução de casos de CAUA; (ii) o conhecimento de fatores influentes na CAUA; (iii) o desenvolvimento de um modelo híbrido de análise de decisão, denominado de CAUA-SAD, baseado nos princípios de similaridade vetorial, de sistemas baseados em conhecimento (sistemas especialistas) e no uso das MCDA. A avaliação da qualidade dos modelos desenvolvidos indicou uma concordância de 56%, e que melhorias nos modelos podem ser obtidas p...
O Distrito Federal (DF) possui 16 Estações de Tratamento de Esgotos (ETE) em operação, que empreg... more O Distrito Federal (DF) possui 16 Estações de Tratamento de Esgotos (ETE) em operação, que empregam tecnologias de tratamento diversificadas e geram diariamente cerca de 300 toneladas de lodo. A presente pesquisa objetivou a caracterização dos processos de produção e tratamento e da qualidade do lodo de esgotos gerado nas ETEs do DF, para identificar as alternativas de disposição final viáveis. Os coeficientes de produção de lodo foram verificados e comparados com a literatura, tendo-se deparado com a dificuldade em se estabelecer um padrão de geração de lodo para a fase de tratamento primário. Foram levantados os requisitos necessários à gestão do lodo, e, com a caracterização dos lodos das ETEs do DF, foi composto um cenário com alternativas que propiciam o aproveitamento do lodo. Concluiu-se que um tratamento complementar simples e de baixo custo para higienização do lodo permitiria sua adequação para o uso agrícola.
Purpose – The chaotic growth of cities results in numerous problems related to public health and ... more Purpose – The chaotic growth of cities results in numerous problems related to public health and urban environment. One of these problems is the crisis in urban water supply systems. The objective of this paper is to develop a mathematical model for the water supply system crisis in urban environment (WSC) able to tackle with the ambiguity of the real available data.Design/methodology/approach – The applied methodology comprises the following steps: (1) identification of the influencing factors in WSC; (2) proposal of a conceptual model for WSC description; (3) gathering and simulation of the necessary and available data; (4) optimization of the conceptual model parameters; and (5) verification of the proposed model performance.Findings – The results indicated that there is a great amount of influencing factors in WSC (showed in the complete text); the conceptual model that was developed is composed by two others partial models ( ). The first partial model explained the water consum...
A bibliographic survey on fish production by water reuse is presented. It is proposed a research ... more A bibliographic survey on fish production by water reuse is presented. It is proposed a research methodology to verifying the technical viability of fish production using effluents from wastewater treatment plants which employ serial stabilization lagoons systems in the Federal District, Brazil. Preliminary results obtained by using this proposed methodology are described. The first data permit to conclude that the best fish cultivation method is the policulture between Oreochromis niloticus and Hypophtalmychtis molitrix in ponds fed by treated sewage in stabilization lagoons on a pulsation mode.
Revista Eletrônica de Gestão e Tecnologias Ambientais
O objetivo desta pesquisa foi analisar a aplicabilidade dos processos para tratamento de esgotos ... more O objetivo desta pesquisa foi analisar a aplicabilidade dos processos para tratamento de esgotos de residências unifamiliares no Brasil e as condições em que estes seriam recomendados. Foi desenvolvida uma metodologia baseada nos métodos multiobjetivo ELECTRE-III e TOPSIS. Avaliaram-se os seguintes processos: (1) Tanque séptico; (2) Tanque séptico e filtro anaeróbio; (3) Tanque séptico e Wetland; (4) UASB e biofiltro aerado submerso (BAS); (5) Reator UASB e lodo ativado convencional; e (6) Tanque séptico e Reator Biológico de Membrana (MBR). Esses processos foram avaliados em três cenários: (1) lençol freático baixo, solo com alta permeabilidade e risco epidemiológico e ambiental pequeno; (2) lençol freático alto e/ou solo com infiltração baixa e risco epidemiológico e ambiental grande; e (3) reúso direto não-potável da água. Concluiu-se que, para o Cenário 1, a melhor alternativa é Tanque Séptico seguido ou não por filtro anaeróbio. Para o Cenário 2, é mais adequado empregar Tanque...
Ambiente e Agua - An Interdisciplinary Journal of Applied Science
Biological processes are the most widespread methods for wastewater treatment. However, they are ... more Biological processes are the most widespread methods for wastewater treatment. However, they are limited in their ability to degrade toxic and refractory pollutants, contaminants that electrochemical processes can remove. Therefore, this research explored the possibility of treating sewage by an anaerobic biological process followed by an aerobic system integrated to an electrolytic process. Three sequential batch reactors were operated in an automated way. Each of three reactors represented a process: aerobic biological treatment (BR); electrolytic treatment (ER); and a combination of both, the bio electrolytic reactor (BER). Two phases were ran with different electrodes: (Phase 1) stainless steel and (Phase 2) graphite. The electric current was varied from 0.001 to 0.100 A. COD, TS, SS, turbidity, and the zooplankton community were monitored. The highest organic matter removal efficiencies were 86%, 79% and 87% for BR, ER and BER, respectively. The best weekly BER efficiencies for...
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Papers by Marco Antonio de Souza
A microcalorimetric method was applied to study microbial soil activity of ornamental flower (Dahlia pinnata) plantations when irrigated with potable water and wastewaters. The samples were irrigated with potable water PW sample (reference) and treated wastewaters from Municipal Wastewater Treatment Station of Asa Norte in Brasilia City (Brazil). Three different water treatments were applied to irrigate soil samples, named TW1, TW2, and TW3 samples. The increase of the microbial soil activity observed in TW1 sample must have occurred because of the high amount of organic waste dissolved in wastewater used for irrigation. This rise indicates that the present treated wastewater can affect natural life cycle. However, only a low alteration in microbial soil activity was observed in the TW2 and TW3 samples, which suggests that these wastewater treatments can be normally used to irrigate soils without bringing environmental consequences, once they offer a great opportunity to upgrade
and protect the environment.
A microcalorimetric method was applied to study microbial soil activity of ornamental flower (Dahlia pinnata) plantations when irrigated with potable water and wastewaters. The samples were irrigated with potable water PW sample (reference) and treated wastewaters from Municipal Wastewater Treatment Station of Asa Norte in Brasilia City (Brazil). Three different water treatments were applied to irrigate soil samples, named TW1, TW2, and TW3 samples. The increase of the microbial soil activity observed in TW1 sample must have occurred because of the high amount of organic waste dissolved in wastewater used for irrigation. This rise indicates that the present treated wastewater can affect natural life cycle. However, only a low alteration in microbial soil activity was observed in the TW2 and TW3 samples, which suggests that these wastewater treatments can be normally used to irrigate soils without bringing environmental consequences, once they offer a great opportunity to upgrade
and protect the environment.