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Heber Martins De Paula - One of the best experts on this subject based on the ideXlab platform.
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Quality and treatment of waste water from Concrete Plants: a case study
Proceedings of the Institution of Civil Engineers - Water Management, 2019Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Leonardo Santos AndradeAbstract:The objective of this study was to evaluate the quality of waste water from a Concrete Plant that was treated with chemical coagulants combined with Moringa oleifera. In the treatment system employed at the Plant, waste-water samples were collected at three different points at the beginning and end of each production week throughout the 1 month production life cycle. The monitored parameters included turbidity, pH, alkalinity and hardness. Samples were collected from an intermediate chamber of the treatment system and treated with coagulants in the laboratory. The results indicated that the quality of the waste water exceeded the established limits for the supply of non-potable water, especially for turbidity. The introduction of the coagulation process significantly improved the quality of the waste water or recycled water (significance of 5%) and 99·94% of the turbidity was removed, which enabled the reuse of water for washing vehicles, producing Concrete and flushing toilets.
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dosage optimization of moringa oleifera seed and traditional chemical coagulants solutions for Concrete Plant wastewater treatment
Journal of Cleaner Production, 2018Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Antover Panazzolo Sarmento, Leonardo Santos AndradeAbstract:Abstract The purpose of this study was to determine the ideal ranges for the application of aluminum sulfate, ferric chloride and Moringa oleifera (MO) extract, all in the form of solutions, for the treatment of Concrete Plant wastewater. This optimization was performed using the response surface methodology. A rotational central composite design was used based on three independent variables and five levels, which yielded a total of 20 assays. Applying a desirability function, were identified the optimum ranges of the coagulant concentrations. The ideal ranges were experimentally analyzed and the results compared to the predicted values by the model. The optimum concentrations of the coagulants MO, aluminum sulfate (Al2(SO4)3) and ferric chloride (FeCl3) were 9.4 mL L−1, 7.2 mL L−1 and 3.6 mL L−1, respectively, with a 99.9% reduction in the turbidity. Reuse of the treated wastewater outside the Concrete Plant requires the correction of pH, alkalinity and hardness.
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GESTÃO DA ÁGUA EM USINA DE CONCRETO: ANALISE DO RISCO DAS ATIVIDADES E MONITORAMENTO DA QUALIDADE DA ÁGUA RESIDUÁRIA PARA FINS DE REUSO Water management in Concrete Plant: analyze risk activities and monitoring the quality of wastewater for reuse pur
2015Co-Authors: Heber Martins De Paula, Carlos Eduardo FernandesAbstract:RESUMO: As usinas de concreto vem enfrentando o desafio de aumentar a producao, reduzindo o volume de residuos gerados. Suas principais atividades demandam de volumes consideraveis de agua que, ao mesmo tempo, nao devem ser descartadas no solo ou redes coletoras, pois podem gerar riscos ao meio ambiente. Assim, este artigo tem como objetivo avaliar a frequencia e o risco das atividades da usina quanto ao uso da agua. Alem disso, monitorar a qualidade da agua do sistema de tratamento quanto ao pH e a turbidez. Para tanto, foi aplicado o metodo de Avaliacao de Risco da Atividade aliado a observacoes realizadas in loco para melhor representar as acoes de um dia convencional de producao. O levantamento foi realizado por seis dias aleatorios por tres semanas consecutivas. Para avaliacao da qualidade da agua residuaria foram monitorados o pH e a turbidez, sempre no ultimo dia de producao da usina, representando a pior situacao. Os resultados mostraram que a lavagem dos caminhoes e a atividade que apresenta maior risco ao meio ambiente, pois acontece com maior frequencia dentro do espaco de producao. O sistema atual nao consegue remover a turbidez para destinacao da agua ao reuso, mantendo o pH acima de 12. ABSTRACT: The Concrete Plants are facing the challenge of increasing production, reducing the volume of waste generated. Its main activities require considerable volumes of water at the same time, should not be dismissed on the ground or collecting networks, they could generate risks to the environment. Thus, this article aims to evaluate the frequency and risk of the activities of the Concrete Plant on the use of water. In addition, monitor the quality of water treatment system for pH and turbidity. To this end, we applied the method of the Activity Risk Assessment together with in situ observations to better represent the actions of a conventional production day. The survey was conducted by six random days for three consecutive weeks. To evaluate the quality of wastewater pH and turbidity, always on the last day of production of the Plant were monitored, representing the worst case. The results showed that washing of trucks is the activity that presents the greatest risk to the environment, because it happens more often within the space of production. The current system cannot remove turbidity for allocation of water to the reuse while maintaining the pH above 12.
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Concrete Plant wastewater treatment process by coagulation combining aluminum sulfate and moringa oleifera powder
Journal of Cleaner Production, 2014Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Leonardo Santos AndradeAbstract:The high water consumption and large amount of wastewater generated in the Concrete industry has received special attention as an environmental issue. When untreated, the Concrete wastewater has characteristics that prevent it from being safely disposed or even reused. This paper proposes a complementary treatment for wastewater from a Concrete Plant, which has a conventional treatment system composed by sedimentation tanks. The proposed process uses Al2(SO4)3 and Moringa oleifera (MO) as coagulants. With this combination of coagulants, more than 90% of the turbidity was removed, and a ratio of 20:80 (w/w) was obtained for MO and Al2(SO4)3. After treatment, the wastewater was suitable for reuse in washing vehicles or flushing toilets.
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Qualidade da água residuária de usina de concreto para fins de aproveitamento
Revista IBRACON de Estruturas e Materiais, 2014Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira IlhaAbstract:Efficient water use is one of the most important requirements of cleaner production, and the use of the wastewater from Concrete production can be an important means to this end. However, there are no Brazilian studies on the quality of Concrete Plant wastewater and the activities in which such water can be used. This paper aims to evaluate the quality of Concrete Plant wastewater and to propose guidelines for its treatment for non-potable applications. Wastewater samples were collected from three points in the studied treatment system, and tests were later performed in the laboratory to evaluate the water quality. The results obtained were compared with the limit values for the quality parameters that have been used for the analysis of the non-potable water supply in Brazil. The results indicate a need to at least add coagulation and pH correction processes to the treatment system.
Leonardo Santos Andrade - One of the best experts on this subject based on the ideXlab platform.
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Quality and treatment of waste water from Concrete Plants: a case study
Proceedings of the Institution of Civil Engineers - Water Management, 2019Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Leonardo Santos AndradeAbstract:The objective of this study was to evaluate the quality of waste water from a Concrete Plant that was treated with chemical coagulants combined with Moringa oleifera. In the treatment system employed at the Plant, waste-water samples were collected at three different points at the beginning and end of each production week throughout the 1 month production life cycle. The monitored parameters included turbidity, pH, alkalinity and hardness. Samples were collected from an intermediate chamber of the treatment system and treated with coagulants in the laboratory. The results indicated that the quality of the waste water exceeded the established limits for the supply of non-potable water, especially for turbidity. The introduction of the coagulation process significantly improved the quality of the waste water or recycled water (significance of 5%) and 99·94% of the turbidity was removed, which enabled the reuse of water for washing vehicles, producing Concrete and flushing toilets.
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dosage optimization of moringa oleifera seed and traditional chemical coagulants solutions for Concrete Plant wastewater treatment
Journal of Cleaner Production, 2018Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Antover Panazzolo Sarmento, Leonardo Santos AndradeAbstract:Abstract The purpose of this study was to determine the ideal ranges for the application of aluminum sulfate, ferric chloride and Moringa oleifera (MO) extract, all in the form of solutions, for the treatment of Concrete Plant wastewater. This optimization was performed using the response surface methodology. A rotational central composite design was used based on three independent variables and five levels, which yielded a total of 20 assays. Applying a desirability function, were identified the optimum ranges of the coagulant concentrations. The ideal ranges were experimentally analyzed and the results compared to the predicted values by the model. The optimum concentrations of the coagulants MO, aluminum sulfate (Al2(SO4)3) and ferric chloride (FeCl3) were 9.4 mL L−1, 7.2 mL L−1 and 3.6 mL L−1, respectively, with a 99.9% reduction in the turbidity. Reuse of the treated wastewater outside the Concrete Plant requires the correction of pH, alkalinity and hardness.
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Concrete Plant wastewater treatment process by coagulation combining aluminum sulfate and moringa oleifera powder
Journal of Cleaner Production, 2014Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Leonardo Santos AndradeAbstract:The high water consumption and large amount of wastewater generated in the Concrete industry has received special attention as an environmental issue. When untreated, the Concrete wastewater has characteristics that prevent it from being safely disposed or even reused. This paper proposes a complementary treatment for wastewater from a Concrete Plant, which has a conventional treatment system composed by sedimentation tanks. The proposed process uses Al2(SO4)3 and Moringa oleifera (MO) as coagulants. With this combination of coagulants, more than 90% of the turbidity was removed, and a ratio of 20:80 (w/w) was obtained for MO and Al2(SO4)3. After treatment, the wastewater was suitable for reuse in washing vehicles or flushing toilets.
Marina Sangoi De Oliveira Ilha - One of the best experts on this subject based on the ideXlab platform.
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Quality and treatment of waste water from Concrete Plants: a case study
Proceedings of the Institution of Civil Engineers - Water Management, 2019Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Leonardo Santos AndradeAbstract:The objective of this study was to evaluate the quality of waste water from a Concrete Plant that was treated with chemical coagulants combined with Moringa oleifera. In the treatment system employed at the Plant, waste-water samples were collected at three different points at the beginning and end of each production week throughout the 1 month production life cycle. The monitored parameters included turbidity, pH, alkalinity and hardness. Samples were collected from an intermediate chamber of the treatment system and treated with coagulants in the laboratory. The results indicated that the quality of the waste water exceeded the established limits for the supply of non-potable water, especially for turbidity. The introduction of the coagulation process significantly improved the quality of the waste water or recycled water (significance of 5%) and 99·94% of the turbidity was removed, which enabled the reuse of water for washing vehicles, producing Concrete and flushing toilets.
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dosage optimization of moringa oleifera seed and traditional chemical coagulants solutions for Concrete Plant wastewater treatment
Journal of Cleaner Production, 2018Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Antover Panazzolo Sarmento, Leonardo Santos AndradeAbstract:Abstract The purpose of this study was to determine the ideal ranges for the application of aluminum sulfate, ferric chloride and Moringa oleifera (MO) extract, all in the form of solutions, for the treatment of Concrete Plant wastewater. This optimization was performed using the response surface methodology. A rotational central composite design was used based on three independent variables and five levels, which yielded a total of 20 assays. Applying a desirability function, were identified the optimum ranges of the coagulant concentrations. The ideal ranges were experimentally analyzed and the results compared to the predicted values by the model. The optimum concentrations of the coagulants MO, aluminum sulfate (Al2(SO4)3) and ferric chloride (FeCl3) were 9.4 mL L−1, 7.2 mL L−1 and 3.6 mL L−1, respectively, with a 99.9% reduction in the turbidity. Reuse of the treated wastewater outside the Concrete Plant requires the correction of pH, alkalinity and hardness.
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Concrete Plant wastewater treatment process by coagulation combining aluminum sulfate and moringa oleifera powder
Journal of Cleaner Production, 2014Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira Ilha, Leonardo Santos AndradeAbstract:The high water consumption and large amount of wastewater generated in the Concrete industry has received special attention as an environmental issue. When untreated, the Concrete wastewater has characteristics that prevent it from being safely disposed or even reused. This paper proposes a complementary treatment for wastewater from a Concrete Plant, which has a conventional treatment system composed by sedimentation tanks. The proposed process uses Al2(SO4)3 and Moringa oleifera (MO) as coagulants. With this combination of coagulants, more than 90% of the turbidity was removed, and a ratio of 20:80 (w/w) was obtained for MO and Al2(SO4)3. After treatment, the wastewater was suitable for reuse in washing vehicles or flushing toilets.
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Qualidade da água residuária de usina de concreto para fins de aproveitamento
Revista IBRACON de Estruturas e Materiais, 2014Co-Authors: Heber Martins De Paula, Marina Sangoi De Oliveira IlhaAbstract:Efficient water use is one of the most important requirements of cleaner production, and the use of the wastewater from Concrete production can be an important means to this end. However, there are no Brazilian studies on the quality of Concrete Plant wastewater and the activities in which such water can be used. This paper aims to evaluate the quality of Concrete Plant wastewater and to propose guidelines for its treatment for non-potable applications. Wastewater samples were collected from three points in the studied treatment system, and tests were later performed in the laboratory to evaluate the water quality. The results obtained were compared with the limit values for the quality parameters that have been used for the analysis of the non-potable water supply in Brazil. The results indicate a need to at least add coagulation and pH correction processes to the treatment system.
Carl-alexander Graubner - One of the best experts on this subject based on the ideXlab platform.
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chapter 4 eco friendly Concretes with reduced water and cement content mix design principles and experimental tests
Handbook of Low Carbon Concrete, 2017Co-Authors: Tilo Proske, Stefan Hainer, Moien Rezvani, Carl-alexander GraubnerAbstract:The major environmental impact of Concrete is caused by CO2 emissions during cement production. Great potential for reducing the impact is seen especially for Concretes with normal strength. The use of superplasticizers and highly reactive cements as well as an optimization of particle-size distribution and reduction in water content allow a significant reduction in Portland cement clinker in the cement and Concrete. Essential is the addition of mineral fillers (e.g., limestone powder) to provide an optimal paste volume. In addition, the already practicable substitution of secondary raw materials like fly ash or furnace slag for cement clinker is an appropriate option that is, however, limited by the availability of these resources. In several test series the fresh and hardened Concrete properties of Concretes with reduced water and cement content were investigated, especially their workability, strength development, design-relevant mechanical properties, and durability aspects such as carbonation and resistance against sulfate attack. It was shown that Concretes with cement clinker and slag contents as low as 150 kg/m³ were able to meet the usual requirements of workability, compressive strength (~40 N/mm²), and mechanical properties. The carbonation depth of Concretes with 150–175 kg/m³ clinker and slag was equal to or lower than the depth of conventional reference Concretes for exterior structures. The ecological advantages were identified using environmental performance evaluation. A reduction of up to 35% in environmental impact was calculated compared with conventional Concrete and of more than 60% with granulated blast furnace slag. Practical application was verified by means of full-scale tests in a precast and ready-mix Concrete Plant.
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eco friendly Concretes with reduced water and cement content mix design principles and application in practice
Construction and Building Materials, 2014Co-Authors: Tilo Proske, Stefan Hainer, Moien Rezvani, Carl-alexander GraubnerAbstract:Abstract The major environmental impact of Concrete is caused by the CO 2 -emission during the cement production. Great potential for the reduction of the impact is seen especially for Concretes with normal strength. The use of superplasticizer and high reactive cements as well as the optimization of the particle size distribution and the reduction of the water content allows a significant reduction of the Portland cement clinker in the Concrete. Essential is the addition of mineral fillers (e.g. limestone powder) to provide an optimal paste volume. In addition the already practicable substitution of the cement clinker by secondary raw materials like fly-ash or furnace-slag is an appropriate opportunity but limited by the availability of these resources. In several test series the fresh and hardened Concrete properties of water and cement reduced Concretes were investigated, especially the workability, the strength development, the design relevant mechanical properties as well as durability aspects like carbonation. It was shown that Concretes with cement contents lower than 125 kg/m 3 were able to meet the usual required workability, strength (app. 40 MPa) and mechanical properties. The carbonation depth of Concretes with 150–175 kg/m 3 of cement was equal or lower than the depth of the conventional reference Concretes for exterior structures. The ecological advantages were identified, using the environmental performance evaluation. A reduction up to 50% in environmental impact compared with the conventional Concrete and a reduction of more than 65% by using blast furnace cement was calculated. The application in practice was verified conducting full-scale tests in a precast and ready-mix Concrete Plant. The special requirements on workability and early strength were fulfilled with a cement content of 150 kg/m 3 .
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eco friendly Concretes with reduced water and cement contents mix design principles and laboratory tests
Cement and Concrete Research, 2013Co-Authors: Tilo Proske, Stefan Hainer, Moien Rezvani, Carl-alexander GraubnerAbstract:Abstract The major environmental impact of Concrete is caused by CO 2 -emissions during cement production. Great potential for reducing the impact is seen especially for Concretes with normal strength. The use of superplasticizers and highly reactive cements as well as optimization of particle-size distribution and reduction in water content allows a significant reduction in Portland cement clinker in the Concrete. Essential is the addition of mineral fillers (e.g. limestone powder) to provide an optimal paste volume. In addition, the already practicable substitution of secondary raw materials like fly-ash or furnace-slag for cement clinker is an appropriate option which is however limited by the availability of these resources. In several test series the fresh and hardened Concrete properties of Concretes with reduced water and cement contents were investigated, especially their workability, strength development, design-relevant mechanical properties as well as durability aspects such as carbonation. It was shown that Concretes with cement clinker and slag contents as low as 150 kg/m 3 were able to meet the usual requirements of workability, compressive strength (approx. 40 N/mm 2 ) and mechanical properties. The carbonation depth of Concretes with 150-175 kg/m 3 clinker and slag was equal or lower than the depth of conventional reference Concretes for exterior structures. The ecological advantages were identified, using environmental performance evaluation. A reduction of up to 35% in environmental impact was calculated compared with conventional Concrete and of more than 60% with granulated blast-furnace slag. Practical application was verified by means of full-scale tests in a precast and ready-mix Concrete Plant.
Burachat Chatveera - One of the best experts on this subject based on the ideXlab platform.
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use of ready mixed Concrete Plant sludge water in Concrete containing an additive or admixture
Journal of Environmental Management, 2009Co-Authors: Burachat Chatveera, Pusit LertwattanarukAbstract:Abstract In this study, we investigated the feasibility of using sludge water from a ready-mixed Concrete Plant as mixing water in Concrete containing either fly ash as an additive or a superplasticizer admixture based on sulfonated naphthalene-formaldehyde condensates (SNF). The chemical and physical properties of the sludge water and the dry sludge were investigated. Cement pastes were mixed using sludge water containing various levels of total solids content (0.5, 2.5, 5, 7.5, 10, 12.5, and 15%) in order to determine the optimum content in the sludge water. Increasing the total solids content beyond 5–6% tended to reduce the compressive strength and shorten the setting time. Concrete mixes were then prepared using sludge water containing 5–6% total solids content. The Concrete samples were evaluated with regard to water required, setting time, slump, compressive strength, permeability, and resistance to acid attack. The use of sludge water in the Concrete mix tended to reduce the effect of both fly ash and superplasticizer. Sludge water with a total solids content of less than 6% is suitable for use in the production of Concrete with acceptable strength and durability.
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effect of sludge water from ready mixed Concrete Plant on properties and durability of Concrete
Cement & Concrete Composites, 2006Co-Authors: Burachat Chatveera, Pusit Lertwattanaruk, Natt MakulAbstract:Besides the increasing disposal cost, sludge water, a wastewater washout from ready-mixed Concrete Plant, has caused environmental impact problems. This paper investigates the utilization and recycling of sludge water as mixing water for Concrete production. The basic properties of sludge water were obtained according to ASTM standards. The properties of dry sludge powder such as chemical compositions and physical properties were investigated. The properties of fresh Concrete studied were unit weight, slump, and temperature rise. The mechanical properties of Concrete, such as compressive strength and modulus of elasticity, were studied. The durability aspects, such as drying shrinkage and weight loss due to acid attack, were investigated. For parametric study, sludge water was used as a replacement of tap water varying from 0% to 100% by weight. The water-to-cement ratios were 0.5, 0.6, and 0.7, respectively. In this study the sludge water tested has a high alkalinity and the total solids content exceeding the limit of ASTM C94, contributing to the more porous and weaker matrix. As a result, when increasing the percentage of sludge water in mixing water, the drying shrinkage and weight loss due to acid attacks increased, and the slump and strength decreased. However, the unit weight and temperature of fresh Concrete were not affected by the use of sludge water.
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Effects of Sludge Water from Ready-Mixed Concrete Plant on Concrete Containing Admixtures
2006Co-Authors: Burachat Chatveera, Surapong DaramAbstract:This research was aimed to study the effect of sludge water from ready-mixed Concrete Plantto replace mixing water in Concrete containing admixtures. The admixtures used in this study werefly ash and superplasticizer. The experimental procedures were performed to study the characteristicof sludge water as Concrete mixing water and to determine the optimum total solid content ofsludge water in cement paste by varying the percentage of total solid content in sludge waterbetween 0.5%, 2.5%, 5%, 7.5%, 10%, 12.5% and 15%. The selected sludge water was used formixing and studying the behavior of Concrete. Test results showed that sludge powder, consisting ofhydration products and small particles, has more loss of ignition value than cement type I and flyash. Total solid content of sludge water, found in the range of 54,100-61,300 mg/l. for the criteria ofASTM C94, had an influence on the compressive strength and setting time of cement paste. Thesludge water decreased an efficiency of Concrete admixtures. Concrete mixed with sludge waterand admixtures has better mechanical and durability properties than Concrete mixed with sludgewater only. Keywords : Ready-mixed Concrete Plant / Recycle / Sludge Water