Utiliza����o de lodo de efluente dom��stico: efeitos na produtividade agr��cola e em alguns aspectos ambientais

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Import��ncia da frequ��ncia de descarte de lodo na efici��ncia dos decantadores de esta����es de tratamento de ��gua em ciclo completo

No trabalho foram avaliados tr��s diferentes per��odos de descarte do Iodo armazenado nos decantadores da ET A Bolonha, com a finalidade de recomendar a rotina operacional que apresenta os melhores resultados na efici��ncia dos decantadores. Para isso o trabalho foi dividido em tr��s fases experimentais, sendo que na fase 1 foi avaliada a efici��ncia da atual rotina operacional dos decantadores, que �� de descarga total do Iodo de 12 em 12 dias. Na fase 2 a rotina operacional foi alterada para descarga de Iodo di��ria durante o tempo de 5 minutos, para que se pudesse atender as recornenda����es do projeto executivo; e quanto na fase 3 a rotina operacional foi novamente alterada, descarga de Iodo de 5 em 5 dias durante o tempo de 5 minutos, em fun����o de se obter melhores resultados de efici��rlcia. Em todas as fases foram determinadas as vari��veis s��lidos suspensos totais, turbidez e cor aparente no afluente e efluente dos decantadores, bem como determinado a concentra����o de s��lidos do Iodo gerado nos decantadores e no sistema auxiliar de remoção de Iodo da bandeja intermedi��ria. Al��m disso, em todas as fases, foi quantificado o volume de Iodo descartado e a produ����o mensal de s��lidos gerados pelo Iodo. Com a pesquisa foi poss��vel observar que sob o ponto de vista de efici��ncia dos decantadores, a rotina operacional implementada na fase 2 (remoção di��ria do Iodo) e na fase 3 (descargas de Iodo a cada 5 dias) apresentaram resultados semelhantes, por��m, com rela����o a gera����o de res��duos a rotina operacional implementada na fase 3 se mostrou mais adequada, j�� que nesta fase houve um decr��scimo m��dio de 48% em rela����o a fase 1. Assim, recomenda-se que seja estuda a rotina implementada na fase 3 deste estudo em todos os seis decantadores da ETA Bolonha.

Atributos qu��micos do solo e crescimento de laranjeiras ���pera��� irrigadas com efluente de esgoto tratado e fertilizadas com lodo de esgoto compostado

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Tratamento de ��guas residu��rias de suinocultura em reatores anaer��bios seguidos de filtro biol��gico percolador e wetlands

P��s-gradua����o em Microbiologia Agropecu��ria - FCAV

Doses de lodo de esgoto compostado em produ����o de tapete de grama esmeralda imperial

The efficiency of nitrogen fertilization for sod production can be increased by using slow-release sources such as sewage sludge compost, which, due to its characteristics can be a substitute of part or all inorganic fertilization for grass. No results were found for the use of sludge compost in sod production in Brazil. This study evaluated the effect of rates of sewage sludge compost on the production of zoysiagrass. Treatments consisted of five rates of composted sewage sludge compost (0, 12, 24, 36 and 48 Mg ha-1, on a dry basis), plus a treatment of inorganic fertilization (300 kg ha-1 N, 80 kg ha-1 P2O5, and 200 kg ha-1 K2O). The results indicated different mineralization rates of the organic compounds present in the sludge; 120 days after sludge application, more Mg (100 %), K (90 %) and N (67 %) has been released than S (57 %), P (40 %) and Ca (31 %). The use of composted sewage sludge for zoysiagrass adequately supplied nutrients when applied to the soil surface at rates more than 36 Mg ha-1. After sod cutting, the rates of sewage sludge compost provided a linear increase in potential soil acidity, soil contents of OM, P, S, Fe, Cu, Mn, Zn, Cu and Ni, and linear decrease in pH, soil concentration of Ca and Mg and base saturation. Compost rates, increasing from 0 to 48 Mg ha-1, reduced the sod mass, reaching values of 4.0 kg/sod at the highest rate. High compost doses (36 and 48 Mg ha-1, respectively) also induced the highest resistance, with values in the order of 35 and 33 kgf.

Estudo da qualidade da ��gua distribu��da pelo po��o artesiano da FEG em rela����o �� ��gua servida pelo abastecimento p��blico de Guaratinguet��

We conducted a study of the quality of water distributed by Artesian Well in relation to water supply served by the public for purposes of human consumption of UNESP Campus Guaratinguet��. Two sections of the network were randomly chosen and monitored for 105 days: the stretch of the pipeline started off the Water Treatment Station of the Autonomous Service of Water, Sewage and waste in the Municipality of Guaratinguet�� and ended in a point consumption of the Child Family Center, while the section B began at the output of an artesian well and finished in a point of consumption of the Department of Civil Engineering. It is the deterioration of water quality in parts A and B, through comparative analysis of Bicarbonates, Total Hardness, Total Iron, free residual chlorine, pH, Total Residual, Turbidity, Conductivity, Color, Fecal Coliforms and Total Coliforms. Among the observations that can be highlighted: the Total Hardness was found in highest concentration in the extract; for Total Iron significant variations were obtained for both parts, and reduction of this parameter in two points of consumption analyzed, not the expected increase concentration, because the contact of water along the pipe, the CRL showed significant depletion to section A, which can be related to impurities in the water, the presence of biofilm on the walls of pipes, or because this is the stretch of greater extent to be covered by water for pH, this indicated that the water is alkaline and slightly acidic stretch in section B; Turbidity was found for the higher concentration to the passage, and a considerable reduction of this parameter at point consumption due to deposition of particulate matter along the stretch, the conductivity also showed a higher concentration in the extract, as well as an increase in this parameter at the point of consumption. Upon leaving ... (Complete abstract click electronic access below)

Proposta metodol��gica para a corre����o do coeficiente de retorno de esgoto sanit��rio em unidades com sistemas de aproveitamento de ��gua pluvial

The use of rainwater for non-potable purposes generates a reduction in the consumption of treated water, however, this reduction is not observed in the generation of wastewater, as this is independent of the water source. In Brazil, the pricing on the services of collection and treatment of sewage, in general, is based on the coefficient of return of the sewage disposal system, which has a relation sewer / water proportional to the consumption of treated water measured at the consumer unit. The use of rainwater originating from utilization systems infer on the coefficient, underestimating the volume of wastewater generated. Therefore, this study presents a methodology for setting the coefficient of return. Different roof areas, reservoir volumes and rates of water consumption situations were simulated. The behavior of adjustment of the coefficient of return were also analyzed for the average area per capita roof (m�� / inhabitant) of Rio Claro - SP. As a result, it can be seen that the adjustment of the coefficient of return is directly proportional to the increase of the roof areas and the volumes of reservoirs, and inversely proportional to the total water demand. The corrected coefficient of return showed the minimum value of 0.83 and a maximum value of 1.45, this variation corresponds to the maximum ratio between the demands of total water and rainwater, since the exploitation of rain water should be used only for non-potable uses, according to NBR 15527 / 07. To the municipality of Rio Claro - SP was noted an adjustment of the coefficient of return ranging from 0.99 to 6.61

An��lise do potencial bioindicador do dipl��podo Rhinocricus padbergi exposto a substrato contendo lodo de esgoto por meio de estudos histol��gico e histoqu��mico do tubo digestivo

N��o dispon��vel

Varia����o espacial e temporal da qualidade da ��gua de tr��s c��rregos tribut��rios do Rio Bauru: respostas ao processo de recupera����o de nascentes

Este trabalho objetivou analisar a qualidade da ��gua de tr��s c��rregos tribut��rios do rio Bauru, levando em conta a polui����o causada por produtos org��nicos e industriais que vinham sendo descartados nos mesmos e as eventuais melhorias conseq��entes das medidas paliativas assumidas pelo DAE-Bauru, mediante a instala����o de interceptores-coletores de ��guas residu��rias ao longo Daqueles corpos de ��gua, at�� que a Estação de Tratamento de Esgotos do munic��pio seja constru��da e se d�� in��cio ao seu funcionamento. O monitoramento destes corpos de ��gua durante o per��odo de estiagem e de cheias proposto nesta pesquisa, incluiu investiga����es sobre as vari��veis qu��micas e f��sicas de amostras das ��guas, obtidas mensalmente em 7 pontos de coleta, localizados a montante e a jusante dos pontos de instala����o dos emiss��rios, ao longo dos c��rregos. As amostras de ��gua foram posteriormente analisadas para fossem obtidas informa����es sobre a efic��cia da instala����o dos interceptores com rela����o ao processo de recupera����o da sa��de dos corpos aqu��ticos em quest��o. Os resultados obtidos mostraram que, de um modo geral, as ��guas de todos os sistemas estudados ainda sofrem impactos, at�� porque ainda h�� aquelas que recebem o esgoto descartado ���in natura���. No entanto, como ja era esperado, nos pontos de coleta localizados em segmentos dos c��rregos nos quais os emiss��rios j�� foram instalados, o impacto ambiental �� menor. Mediante a compara����o dos resultados obtidos das an��lises das caracter��sticas f��sicas e qu��micas das ��guas dos sistemas estudados realizadas durante esta investiga����o com aqueles obtidos nos mesmos corpos de ��gua, em 2007, pudemos observar melhorias da ��gua em alguns dos pontos de coleta

Desidrata����o de lodo proveniente de ETA atrav��s de tubos geotexteis

Currently exists a growing concern for the preservation of the environment Around the world, the environmental awareness in Brazil has strengthened during the past two decades. This concern in Brazil arises from the creation of mechanisms of supervision and punishment on the part of the environmental agencies. In order to meet the pertinent legislation many public and private companies have performed dehydration of waste generated in the process of treatment of industrial effluents, waste water and water treatment in order to reduce transport and disposal costs. The use of geotextile tubes has proven technically and economically feasible to be applied in various situations from water treatment to mining tailings. This work presents the solution adopted for an environmental liability in water treatment plant through the use of geotextile tubes to reduce the water content of the disposal. We evaluated the size distribution curves, Atterberg limits, and chemical composition of the residue. Found high concentrations of aluminum in the waste which would characterize environmental pollution if disposed off directly in nature with no treatment

Avalia����o da atenua����o da toxicidade de lodo de esgoto por associa����o com res��duo vegetal da ind��stria sucro-alcooleira

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Intera����o composto de lodo de esgoto e cinzas de biomassa no desenvolvimento inicial de eucalipto

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Desenvolvimento, implanta����o e avalia����o do desempenho de biorreator anaer��bico de leito fluidizado e leito fixo com filtros biol��gicos em materiais diversos

This study aimed to develop, implement and evaluate the performance of a new type of bioreactor for anaerobic treatment of wastewater using different filling materials like trickling filters post-reactor. This bioreactor has mixed characteristics of the UASB reactors and horizontal flow from the point of view of removal of BOD (Biochemical Oxygen Demand) ssed (settled solids), TS (Total Solids), SS (Suspended Solid), SD (Dissolved Solids) and turbidity. The experimental model consists of a bioreactor with a volume of 12 m��, 2/3 filled by fluidized bed and 1/3 for fixed. The fluidized bed is made of polystyrene plates used as a system percolation and compartmentalized trickling filters, where each compartment was filled with a support medium with different characteristics (gravel number 4, plastic rings of polystyrene, PET and HDPE) . In addition, the output of a filter system was installed three entries filled with activated carbon. The bioreactor was installed in private residence in the city of Igarapava-SP (20�� 02'40.18"S and 47�� 45'01.36" W). The system was highly efficient as the removal of organic contaminant load 92% on average reducing the BOD, a significant result when compared to other anaerobic systems. For the other parameters, the mean reduction was 96% for turbidity, 99% ssed, 67.5% ST, 57% SD and 88% of SS. As for its operation the system was capable of operating in continuous flow without the need for maintenance during the entire period of evaluation and without energy, as it operates taking advantage of the natural slope of the terrain where it is installed. The environmental impacts were minimized due to the preservation of local vegetation allowing the ecosystem to remain unchanged beyond the prototype was completely sealed preventing exhalation of odors and therefore not causing inconvenience to neighboring populations. Given these facts it was concluded that the prototype is shown to be highly feasible deployed as a new alternative for treatment of sewage in rural and urban settings (individual homes, condos, farms, ranches, etc.) Due to ease of design and operability, and sustainability at all stages of execution.

Tratamento anaer��bio-aer��bio de ��guas residu��rias do processamento de cafeeiro em reatores biol��gicos

P��s-gradua����o em Microbiologia Agropecu��ria - FCAV

Estimativa da corre����o do coeficiente de retorno de esgoto sanit��rio em habita����es com sistemas de aproveitamento de ��gua pluvial: estudo de caso da cidade de Bauru (SP)

P��s-gradua����o em Engenharia Civil e Ambiental - FEB