Adriano Luiz Tonetti
Universidade Estadual de Campinas, Engenharia Civil, Faculty Member
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Research Interests: Physics and Humanities
Research Interests: Physics and Humanities
Research Interests: Physics and Humanities
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Research Interests: Geography and Humanities
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Research Interests: Chemistry, Wastewater Treatment, Filtration, Environmental Chemistry, Medicine, and 15 moreHospitals, Biological Sciences, Environmental Sciences, Iron, Tratamento De Efluentes, CHEMICAL SCIENCES, Hydrogen Peroxide, Oxygen, FLUOXETINE, Effluent, Photolysis, Ciprofloxacin, Hydrogen-Ion Concentration, Medical Waste, and Resíduos de Serviços de Saúde
Abstract Agriculture is the major water consumer on the planet, it is estimated that 70% of its global use is for this activity. Thus, the reuse of wastewater appears as a viable alternative to supply the water demand of the agricultural... more
Abstract Agriculture is the major water consumer on the planet, it is estimated that 70% of its global use is for this activity. Thus, the reuse of wastewater appears as a viable alternative to supply the water demand of the agricultural sector. Despites to be a common practice since the ancient times, mainly in arid and semi-arid regions, the use of wastewater is still incipient in some regions due to the illusion of water resources abundance or to the lack of infrastructure and investments. In this review we will discuss the reuse of wastewater in agricultural irrigation around the world, its associated risk for crop yield, soil, and public health, and the most common disinfectant processes used to treat WW for crop irrigation. We focused the public health discussion on the waterborne protozoan Giardia lamblia, given to its epidemiological importance, mainly in developing countries.
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Research Interests: Engineering, Ecological Engineering, Earth Sciences, Environmental Science, Wastewater Treatment, and 13 moreEnvironmental Sciences, Wastewater, Reuse, Rural Areas, Tratamento De Efluentes, Sewage, Sewage Treatment, Effluent, Wastewater Reclamation, Anoxic Sediments, Septic Tank, águas residuais, and husk
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A recirculação de efluente nitrificado para reatores desnitrificantes em sistemas anaeróbios-aeróbios pode implicar na melhora do tratamento de esgotos. Nesse sentido, este estudo avaliou experimentalmente o efeito da razão DQO/N-NO3- na... more
A recirculação de efluente nitrificado para reatores desnitrificantes em sistemas anaeróbios-aeróbios pode implicar na melhora do tratamento de esgotos. Nesse sentido, este estudo avaliou experimentalmente o efeito da razão DQO/N-NO3- na desnitrificação em reator UASB e, a partir dos resultados e com cálculos teóricos de balanço de massa, foi estimado o efeito de diferentes razões de recirculação (R) na concentração final de nitrogênio total em um sistema teórico. Para razões DQO/N-NO3- entre 1,6 - 5,7, a eficiência de desnitrificação varia linearmente entre 31,7 ± 4,3% e 98,6 ± 0,1%, com remoção completa para razões superiores a 5,7. Com a simulação teórica, estimaram-se concentrações finais de nitrogênio total próximas a 30, 20, 15 e 10 mgL-1 utilizando razões de recirculação iguais a 1,5; 2,5; 4,0 e 6,0. Embora não avaliado, o aumento de R deve levar em consideração consequências como a possibilidade de arraste de sólidos, a redução da produção de biogás e a entrada de OD no reat...
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Research Interests: Physics and Humanities
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For agricultural reuse, the disinfection treatment must be efficient to inactivate the resistant pathogens and must not generate harmful byproducts for the soil and crop production. Thus, the aim of this work was to evaluate the possible... more
For agricultural reuse, the disinfection treatment must be efficient to inactivate the resistant pathogens and must not generate harmful byproducts for the soil and crop production. Thus, the aim of this work was to evaluate the possible impacts caused by the irrigation with wastewater disinfected with sodium hypochlorite, peracetic acid, ultraviolet radiation, or the oxidation process UV radiation combined with hydrogen peroxide over soil physicochemical properties and microbial community composition, as well as over the wheat crop yield in the short term. A pot essay was performed in a greenhouse, and at the end the main alterations observed in soil physicochemical properties were due to water type, not to the disinfection treatments. The crop yield was influenced by the water type, but not by the disinfectant treatments. Irrigation with wastewater improved almost 5 times the wheat grains yield, compared with freshwater. Wastewater irrigation increased the abundance of families in...
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Nesta pesquisa estudou-se um sistema para o tratamento de esgotos de pequenas comunidades composto pela combinacao de filtro anaerobio com filtro de areia e reator de desnitrificacao. Para isso foi avaliada a partida e a operacao de tres... more
Nesta pesquisa estudou-se um sistema para o tratamento de esgotos de pequenas comunidades composto pela combinacao de filtro anaerobio com filtro de areia e reator de desnitrificacao. Para isso foi avaliada a partida e a operacao de tres filtros anaerobios com recheio de bambu operados com tempo de detencao hidraulica nominal de 9 horas, sendo o efluente gerado disposto sobre os leitos de quatro filtros de areia em distintas taxas de aplicacoes. No primeiro filtro de areia aplicaram-se 50 Lm-2 uma vez por dia. No segundo, terceiro e quarto filtro, esta mesma carga foi disposta em dois, tres e quatro horarios, espacadas entre as 9 horas e as 16 horas, correspondendo as taxas de 100, 150 e 200 Lm2dia. Cada filtro de areia era seguido por um reator de desnitrificacao em que se buscou um meio propicio a remocao do nitrogenio, objetivando adequar o efluente ao lancamento em um corpo hidrico e como agua de reuso. O sistema foi avaliado quanto a parâmetros fisicos, quimicos e biologicos. Como resultado, o efluente atendeu a legislacao de Minas Gerais e Sao Paulo quanto a DQO e DBO e, apos a correcao do pH e adicao de efluente anaerobio como fonte de carbono, obteve-se uma remocao de 43,5% de N-total no reator em que se aplicou 50 Lm-2dia-1, passando a ter um grau moderado para a pratica agricola. Palavras-chave: esgoto, filtro de areia, tratamento, desnitrificacao, reuso Abstract
Research Interests: Physics and Humanities
In Brazil and in many other developing countries, the collection and treatment of domestic sewage is not universal. A solution to this problem would be the implementation of decentralized systems. However, there is a lack of studies that... more
In Brazil and in many other developing countries, the collection and treatment of domestic sewage is not universal. A solution to this problem would be the implementation of decentralized systems. However, there is a lack of studies that can contribute to the decision-making process on the best system to be adopted: onsite or cluster. Thus, this study evaluated the implementation costs of sewer main line and wastewater treatment system, aiming to determine when the onsite system (septic tank + seepage pit) is more economically viable than the cluster system (septic tank + anaerobic filter). The design calculation for each technology was conducted based on the Brazilian's standards and the number of inhabitants was variable between 4 people for one single residence, up to 1,000 inhabitants for cluster system. Then, an analysis evaluated the system's cost for implementation. The results pointed out three distinct scenarios, showing the interference of distance between households in the total cost of the system. In distances up to 18 m, the cluster system is economically more viable than the onsite system; between 19 and 75 m, the cluster system is more viable than the onsite from a minimum number of contributors; from 76 m on, the onsite system will always be the most economically viable.
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Abstract Agriculture is the major water consumer on the planet, it is estimated that 70% of its global use is for this activity. Thus, the reuse of wastewater appears as a viable alternative to supply the water demand of the agricultural... more
Abstract Agriculture is the major water consumer on the planet, it is estimated that 70% of its global use is for this activity. Thus, the reuse of wastewater appears as a viable alternative to supply the water demand of the agricultural sector. Despites to be a common practice since the ancient times, mainly in arid and semi-arid regions, the use of wastewater is still incipient in some regions due to the illusion of water resources abundance or to the lack of infrastructure and investments. In this review we will discuss the reuse of wastewater in agricultural irrigation around the world, its associated risk for crop yield, soil, and public health, and the most common disinfectant processes used to treat WW for crop irrigation. We focused the public health discussion on the waterborne protozoan Giardia lamblia, given to its epidemiological importance, mainly in developing countries.
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O objetivo deste projeto foi estudar os filtros de areia como um metodo de baixo custo para o pos-tratamento de filtros anaerobios alimentados com esgoto sanitario. Nesta pesquisa buscou-se contribuir com o desenvolvimento deste sistema... more
O objetivo deste projeto foi estudar os filtros de areia como um metodo de baixo custo para o pos-tratamento de filtros anaerobios alimentados com esgoto sanitario. Nesta pesquisa buscou-se contribuir com o desenvolvimento deste sistema avaliando-se a eficiencia de tratamento de quatro filtros de areia com diferentes profundidades de leitos (0,25; 0,50, 0,75 e 1,00 m). A alimentacao era proveniente de reatores anaerobios e foram empregadas cinco cargas diferentes de aplicacao (20, 40, 60, 80 e 100 Lm-2). Cada uma delas dispostas diariamente pelo periodo de um mes. O esgoto bruto, afluente e efluente dos filtros de areia foram analisados semanalmente, permitindo constatar que no emprego de baixas cargas de efluente anaerobio o sistema propiciava uma remocao superior a 96% da DBO, adequacao na emissao de coliformes totais e completa nitrificacao. Aumentando-se as cargas, ocorria uma pequena reducao da eficiencia, no entanto os resultados ainda eram satisfatorios Abstract
Research Interests: Physics and Humanities
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Developing countries demand a sewage treatment plant with low-cost processes that are viable in warm climates. The UASB (upflow anaerobic sludge blanket) associated with the trickling filter (TF) would meet this requirement. However,... more
Developing countries demand a sewage treatment plant with low-cost processes that are viable in warm climates. The UASB (upflow anaerobic sludge blanket) associated with the trickling filter (TF) would meet this requirement. However, there is still a need for studies aimed at the use of new support media. Based on this, the use of expanded polystyrene (EPS) as a support media in TF was evaluated in this study. As a result, the TF filled with EPS presented a final effluent with quality similar to reactors filled with crushed stone or patented materials. The density of EPS (6.56 ± 0.30 kg m−3), the void ratio (61.7 ± 2.1%), and the mean surface area (201.9 ± 14.9 m2 m−3) once again demonstrate that EPS has characteristics similar to other alternative or patented materials. Therefore, we found that EPS can be another alternative material to be used in sewage treatment, and also that one could give an appropriate destination to a portion of this material, which is currently still discar...
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Diante do enorme problema de saude publica que sao as doencas de veiculacao hidrica e do grande deficit sanitario existente no Brasil, principalmente nas cidades com populacao inferior a cinquenta mil habitantes e nas periferias dos... more
Diante do enorme problema de saude publica que sao as doencas de veiculacao hidrica e do grande deficit sanitario existente no Brasil, principalmente nas cidades com populacao inferior a cinquenta mil habitantes e nas periferias dos grandes centros urbanos, o presente trabalho teve como objetivo avaliar a eficiencia de um sistema simplificado, composto por filtro anaerobio, preenchido com aneis de bambu, associado a filtro de areia, na remocao de cistos de Giardia spp. e ovos de helmintos. O filtro anaerobio foi operado com fluxo ascendente e tempo de detencao hidraulica de 12 horas, o efluente proveniente deste reator era aplicado sobre a superficie do leito de areia em oito cargas de 25 L m-2, totalizando uma taxa de aplicacao de 200 L m-2dia-1. As amostras de efluente eram coletadas em tres pontos, P01 (esgoto bruto), P02 (efluente do filtro anaerobio) e P03 (efluente do filtro de areia), mensalmente, durante 12 meses. Nos ultimos quatro meses, foram realizadas analises para deteccao de cistos de Giardia spp. no lodo do filtro anaerobio e de ovos de helmintos no leito do filtro de areia e tambem no lodo. O sistema tambem foi avaliado quanto a remocao de E. coli e quanto aos parâmetros fisicos e quimicos. O filtro anaerobio foi capaz de remover 99,5 ± 28,7% da concentracao estimada de cistos presentes no esgoto bruto, ja o filtro de areia removeu 56,25 ± 31,6% dos cistos presentes no efluente anaerobio, sendo a eficiencia de remocao total do sistema igual 99,7%. Ovos de helmintos foram detectados em apenas tres amostras de efluente anaerobio, em uma concentracao media de 1,5 ovos/L, sendo alcancada a remocao de 100% dos ovos apos a passagem pelo filtro de areia. O sistema tambem proporcionou a reducao de 4 unidades logaritmicas da concentracao de E. coli presente no esgoto bruto, alem do mais, o efluente produzido apresentou baixas concentracoes de Demanda Quimica de Oxigenio (52 ± 24 mgL-1) e Solidos Suspensos Totais (17 ± 20 mgL-1) e, baixos valores de turbidez (3 ± 4 UT), comprovando assim, a eficiencia do sistema simplificado proposto tanto na remocao de patogenos quanto na adequacao dos parâmetros fisicos e quimicos. Abstract
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For the 2014 World Cup and the 2016 Olympic Games, Brazil has expanded its airport infrastructure. This will lead to an increase in wastewater generation from aircrafts. This wastewater is traditionally taken from the aircrafts and... more
For the 2014 World Cup and the 2016 Olympic Games, Brazil has expanded its airport infrastructure. This will lead to an increase in wastewater generation from aircrafts. This wastewater is traditionally taken from the aircrafts and disposed in the public sewage collection system. However, this residual water may have a different composition than the usual sanitary sewage. Therefore, it is important to study an alternative to treat this kind of wastewater. Thus, the objective of this study was to characterize and analyze the treatment of wastewater from airplane toilets through chemical precipitation for the removal of ammonia in the form of struvite. The airplanes' effluent showed a composition similar to human urine with pH 8.9, ammonia nitrogen 4,215 mg L−1, phosphorus 430 mg L−1 and a very high acute toxicity (Vibrio fischeri). The best treatment for struvite formation was with pH 9.0 and molar ratio Mg:NH4:PO4 equal to 1.5:1.0:1.0. In this case, the removal of ammonia and ph...
Research Interests: Environmental Science, Ecotoxicology, Brazil, Medicine, Multidisciplinary, and 15 morePhosphorus, Wastewater, Struvite, Ammonia, Water Science and Technology, Chemical Precipitation, Sewage, Waste Water, Aircraft, Phosphates, Sewage Treatment, Effluent, Nutrient recovery, Aliivibrio fischeri, and águas residuais
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This work evaluated the photo-Fenton degradation of two pharmaceuticals extensively used in human medicine, ciprofloxacin (CIP), and fluoxetine (FLU) when present in an anaerobic pre-treated hospital effluent (HE) at low concentration... more
This work evaluated the photo-Fenton degradation of two pharmaceuticals extensively used in human medicine, ciprofloxacin (CIP), and fluoxetine (FLU) when present in an anaerobic pre-treated hospital effluent (HE) at low concentration (100 μg L(-1)). Operational parameters such as concentration of hydrogen peroxide, iron, and initial pH as well as the effect of iron citrate complex were evaluated considering the degradation of the pharmaceuticals. Iron citrate complex (Fecit) influenced significantly FLU degradation at pH 4.5 achieving 80 % after 20 min, while with iron nitrate only 36 % degradation was obtained after the same time. However, only a slight effect was observed on CIP degradation, achieving 86 % with Fecit and 75 % with Fe(NO3)3, after 20 min. Samples of HE used in this work were previously treated in an anaerobic reactor followed by sand filtration; however, the presence of pharmaceuticals was detected. Degradation of both FLU and CIP was significantly hindered when p...