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Search Results: 1 - 10 of 1365 matches for " Arnaldo Sarti "
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APPLICATION OF THE ANAEROBIC SEQUENCING BATCH REACTORS WITH FIXED FILM IN THE TREATMENT OF INDUSTRIAL WASTEWATER CONTAINING HIGH SULFATE CONCENTRATION = APLICA O DE REATORES ANAERóBIOS OPERADOS EM BATELADAS SEQUENCIAIS COM FILME FIXO NO TRATAMENTO DE áGUA RESIDUARIA INDUSTRIAL RICA EM SULFATO
Arnaldo Sarti,Eugenio Foresti
Holos Environment , 2009,
Abstract: This paper presents and discusses the potential for use of pilot-scale anaerobic sequencing batch biofilm reactors (ASBBR) for the treatment of industrial wastewater containing high sulfate concentration. The pilot-scale ASBBR reactor (total volume=1.2 m3) containing biomass immobilized in inert support (mineral coal) was operated at sulfate loading rates varying from 0.15 to 1.90 kgSO4-2/cycle (cycle of 48h) corresponding to sulfate concentrations of 0.25 to 3.0 gSO4-2.L-1. Domestic sewage and ethanol were utilized as electron donors for sulfate reduction. The mean sulfate removal efficiencies remained in the range of 88 to 92% in the several sulfate concentrations obtained from 92 operational cycles. As post-treatment unit for the generated effluents by the sulfate reduction was used another reactor ASBBR in pilot-scale (total volume=385,0 L) with same inert support for biomass immobilization and different granulometry. The mean COD removal (mean influent=1450 mg.L-1) achieved 88% and total sulfide concentrations (H2S, HS , S2 ) remained in the range of 41 to 71 mg.L-1 during the 35 operational cycles of 48 h. The results demonstrated that the use of ASBBR reactors is an alternative potential for the sulfate removal and as post-treatment of generated effluent. = Este trabalho apresenta e discute o potencial de uso de reatores anaeróbios operados em bateladas seqüenciais com biomassa imobilizada (ASBBR), em escala piloto, no tratamento de água residuária industrial contendo elevadas concentra es de sulfato. No ASBBR, com volume total de 1,2 m3, preenchido com carv o mineral (meio suporte) foram aplicadas cargas de sulfato de 0,15 a 1,90 kg/ciclo com dura o de ciclo de 48 h, correspondendo, respectivamente, às concentra es de sulfato no afluente de 0,25 a 3,0 g.L-1. O esgoto sanitário e etanol foram usados como doadores de elétrons para a redu o do sulfato. As eficiências médias na redu o de sulfato ficaram entre 88 e 92% nos 92 ciclos operacionais. Como pós-tratamento dos efluentes gerados pela redu o de sulfato empregou-se outro reator ASBBR com volume total de 385,0 L e mesmo meio suporte para imobiliza o da biomassa, mas com diferente granulometria. A remo o média de DQO (valor médio afluente: 1450 mg.L-1) foi de 88%, enquanto as concentra es de sulfetos totais (H2S, HS , S2 ) mantiveram-se entre a faixa de 41 e 71 mg.L-1 nos 35 ciclos operacionais de 48h. Os resultados obtidos permitiram concluir que o uso de reatores ASBBR constitui-se em potencial alternativa tanto para a remo o de sulfatos, como no pós-tratamento dos efluentes gerados.
Performance of anaerobic sequencing batch reactors (pilot-scale) in domestic sewage treatment
Arnaldo Sarti,Marcelo Zaiat,Eugenio Foresti
Semina : Ciências Exatas e Tecnológicas , 2005,
Abstract: This study shows the results obtained during 70 days using four pilot scale anaerobic sequencing batch reactors, for sewage system treatment of the campus of the University of S o Paulo in S o Carlos – SP. Each reactor system with 1.2 m3 of total volume, was designed for the treatment of 1.95 m3d3 of domestic sewage, with geometrical conceptions (ratio H-height/D-diameter), mechanical conceptions (mechanical mixing or liquid re-circulation) and different biomass retention type. Three of them were ASBR (AnaerobicSequencing Batch Reactor) with granular biomass and another one was an ASBBR (Anaerobic Sequencing Batch Biofilm Reactor) with biomass consisting of cubic matrices of polyurethane foam. The reactors were inoculated and operated within an 8-hour batch cycle. The reactors monitoring included the oxygen chemical demand (OCD), pH, total suspended solids (TSS) and volatile suspended solids, volatile fatty acids, alkalinity to bicarbonate and methane concentration. Both ASBR reactors with liquid re-circulation did not show a satisfactory performance. The average values of OCD and TSS removal were close to 40% and 60% respectively. In the ASBR reactors with mechanical mixing and ASBBR with immobilized biomass, showed better results. The ASBBR reactor reached average efficiency of 61% and 75% in OCD and TSS removal, while in the ASBR with mechanical mixing, it reached 60% and 79%, respectively.
Remo??o de sulfato de águas residuárias industriais em reator anaeróbio de leito fixo operado em bateladas sequenciais
Sarti, Arnaldo;Silva, Ariovaldo José da;C?rtes, Roberto Sarti;Foresti, Eugenio;
Engenharia Sanitaria e Ambiental , 2008, DOI: 10.1590/S1413-41522008000100003
Abstract: the potential use of an anaerobic sequencing batch biofilm reactor (asbbr) in pilot-scale for the treatment of a sulfate-rich industrial wastewater was evaluated. the pilot 1.2 m3 asbbr reactor was filled with mineral coal for biomass immobilization (fixed film). the sulfate loading rates applied were 0.15; 0.30; 0.65; 1.30 and 1.90 kg so4-2/cycle (or batch). each cycle lasted 48 h. the influent concentrations were, respectively, 0.25; 0.50; 1.0; 2.0 and 3.0 gso4-2.l-1. ethanol was used as electron donor for sulfate reduction. the reactor operated at ambient temperature (29±8oc), and the mean efficiencies of sulfate removal were in the range 88 to 92% in the 92 run cycles. the total operating period comprised 275 days. based on the results obtained in this research, it could be concluded that the asbbr can be an efficient alternative for the removal of sulfate from other industrial wastewaters with similar characteristics.
Tratamento de esgoto sanitário utilizando reatores anaeróbios operados em bateladas sequenciais (escala piloto)
Sarti, Arnaldo;Sakamoto, Isabel Kimiko;Varesche, Maria Bernadete Amancio;Zaiat, Marcelo;Foresti, Eugenio;
Engenharia Sanitaria e Ambiental , 2006, DOI: 10.1590/S1413-41522006000100010
Abstract: the performances of two anaerobic sequencing batch reactors (1.2 m3) containing biomass immobilized in inert support and as granular sludge in the treatment of domestic sewage from the campus of s?o carlos-university of s?o paulo were evaluated. the experimental phase lasted seventy days. during this period, the reactors presented quite similar performances in respect to cod and total suspended solids removal, achieving average efficiencies of approximately 60% and 75%, respectively. the analysis using molecular biology techniques on biomass samples taken at 35th and 70th showed differences in the bacterial community in the reactors indicating that the type of biomass immobilization selected the populations differently. a higher similarity was found for the archaea domain probably because these microorganisms utilize specific substrates formed at the end of the anaerobic process.
AUTOMA O DE REATOR DE LEITO EXPANDIDO EM ESCALA PLENA COM ZONAS ANAERóBIA E AERóBIA SOBREPOSTAS PARA TRATAMENTO DE ESGOTO SANITáRIO
Antonio Wagner Lamon,Neyson Martins Mendon?a,Arnaldo Sarti,Paulo Eduardo Silveira
Tecno-Lógica , 2008,
Abstract: O trabalho tem por objetivo principal apresentar a arquitetura de controle desenvolvida para automa o do reator de leitoexpandido em escala plena (159 m3), considerando a flexibilidade do sistema em operar sob condi es: anaeróbia e aeróbiadistintas ou anaeróbia-aeróbia conjunta. O reator de leito expandido faz parte da esta o de tratamento de esgoto (ETE) do campusda Universidade de S o Paulo (S o Carlos) e, portanto, a abrangência da automa o incluiu a esta o elevatória e tanque pulm ode esgoto bruto (30 m3). Esta automa o está baseada no uso de Controladores Lógicos Programáveis (CLP) que s oequipamentos eletr nicos utilizados para aplica es em sistemas de acionamentos e de controle. Resultados típicos demonitoramento (físico-químico) foram incluídos visando demonstrar o desempenho e a potencialidade desta configura o dereator no tratamento de esgoto sanitário.
Service Quality Experience and Customers’ Behavioural Intentions in Active Sport Tourism  [PDF]
Anna Romiti, Daria Sarti
Modern Economy (ME) , 2016, DOI: 10.4236/me.2016.712127
Abstract: This paper analyzes the role played by experience in the loyalty and intent to return of sports tourists to a running race. The data for this study were collected through an online questionnaire filled in by 984 participants of one of the most important international running races in Italy. A regression analysis was conducted to evaluate the data. The results showed that aesthetic dimensions (the valence and the venue) were the principal determinant of loyalty for active sports tourists. The principal determinants of the intent to return were the venue and the technical quality (the value and the challenge). This study provides suggestions for future research and gives useful insights into managerial implications for sports tourism management.
Melhor o cozinheiro? Um percurso sobre a dimens?o de gênero da prepara??o da comida (Europa ocidental, séculos XVI-XIX)
Sarti, Raffaella;
Cadernos Pagu , 2012, DOI: 10.1590/S0104-83332012000200004
Abstract: this paper analyses the preparation of food in western europe (16th-19th centuries), focusing on its gendered dimension. three main variables are considered: social stratification, geography and time. it suggests that in italy, spain and france in early modern times the cooks employed at the courts and by the aristocracy were generally men; a feminization of the preparation of food started in france from the 18th century onwards. in central and northern europe women were much more involved in the preparation of food in the upper classes, too, even though the fashion for french cuisine in the 17th and 18th centuries implied a growing recourse to male cooks. the paper suggests explanations of these differences and trends over time and discusses the role of nurturing and cooking for the definition of the female identity in different contexts.
A vítima como figura contemporanea
Sarti, Cynthia;
Caderno CRH , 2011, DOI: 10.1590/S0103-49792011000100004
Abstract: thinking about the suffering associated with violence, this text paper aims to raise questions about the social and historical construction of the victim and the extent that this figure takes on contemporary society as moral legitimacy of social demands. the construction of the victim is thought as a way of giving social recognition to suffering, circumscribing it and giving it intelligibility. the field of mental health has an important place in this process, through the delimitation, by the psychiatry, of post traumatic stress disorder (ptsd) as a reference for the treatment of victims of violence, constituting a privileged focus for this reflection. one tries to locate the figure of the victim in the social logic that engenders it, inquiring about the grammar of the conflicts that underlie its construction and thus questioning the uses to which the notion of victim gives rise to legitimate social and political action.
Corpo e Doen?a no transito de saberes
Sarti, Cynthia;
Revista Brasileira de Ciências Sociais , 2010, DOI: 10.1590/S0102-69092010000300005
Abstract: this essay discusses the anthropological studies on body and illness from the way they relate to biological knowledges in the scientific field of health. anthropological research implies an attitude towards these knowledges of such an order that the way it places itself before them turns to be an epistemological problem, defining the status of the anthropological knowledge in this field marked by the hegemony of the biological sciences. from this point of view, two trends are distinguished: medical anthropology, imbedded in the logic of biomedical knowledge, and anthropology of health, whose way of using the notion of culture aims at another epistemological reference, pointing out the effective anthropological contribution to this field, which supposes, in itself, being apart from the significant references that support the bio-medicine.
Contando o conto de Zita: as estórias dos servos sagrados e a história dos servos
Sarti, Rafaella;
Varia Historia , 2007, DOI: 10.1590/S0104-87752007000200013
Abstract: this article aims to discuss on a particular type of narrative about servants, the lifes of holy servants. in particular it will focus on the lives of a medieval saint, zita of lucca, that lived in the 14th century. it will show how her image was modified in order to transform it into a model to be imitated, special by servants, between the 16th and the 18th centuries. it will also describe the strategy elaborated by the catholic church in the 16th and the 17th centuries in order to reform its body and in order to arrest the spreading of the protestant reformation, paying particular attention to the role attributed to hagiography. zita's story could suit the police of moral and religious restoration pursued by the catholic church in the 19th and part of the 20th centuries. it will analyze how the same story has been told differently in different cultural and social contexts and by authors who were pursuing different aims. after analyze the "story of zita's stories", it will discuss the socio-economic transformations of domestic service, in particular on its feminization, trying to understand the more general implications and consequences of feminization with regard to social and gender history.
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