The sludge treatment process intended to reduce the content of biodegradable organic material, the concentration of pathogens and moisture in order to obtain a solid and stable material, which is not hazardous to the environment health and useful for agricultural purposes. This study aims to evaluate the effects of bed drying on physicochemical and microbiological characteristics of domestic sewage sludge samples taken from an upflow anaerobic sludge blanket (UASB) reactor. Sludge samples were collected at 4.8 m from the bottom (sludge A) and 3. 1 m (sludge B) of an UASB reactor, totaling 3 collections, with an interval of 1 month. Each collected sample was subjected to the sludge drying process in cells of drying beds (1. 00 x 2. 00 x 0.50 m). In each cell, 6 samples were collected at 0, 7, 15, 30, 60 and 90 days. The following parameters were evaluated: total solids, volatile solids, temperature, pH, moisture content, total organic carbon, N, P, K, Mg, Na, Ca, Mn, Cd, Co, Cu, Ni, Pb, Zn, lipids, total and fecal coliforms, Salmonella and viable helminth eggs. No physical-chemical, microbiological and parasitological differences between sludge A and sludge B were detected after the period of bed drying. The final concentrations of nutrients and heavy metals as well as the C/N ratio were considered adequate for agricultural purposes. However, the low inactivation of microorganisms indicated the inefficiency of drying beds regarding the removal of pathogen microorganisms. The generated biosolids in both treatments are classified as type B (CONAMA 375/06).
Resumo Durante investigação de fungos conidiais associados a materiais vegetais em decomposição em uma área de extrema relevância biológica no bioma Caatinga, município de Morro do Chapéu, estado da Bahia, novos registros para o continente Americano, América do Sul, Neotrópico e Brasil foram encontrados. Dendryphiopsis biseptata Morgan-Jones, R.C. Sinclair & Eicker e Virgariella atra S. Hughes são novos registros para o continente Americano; Dictyochaeta matsushimae (Hewings & J.L. Crane) Whitton, McKenzie & K.D. Hyde, Endophragmiella boothii (M.B. Ellis) S. Hughes são reportados pela primeira vez para o Neotrópico; Anungitea palustris R.F. Castañeda & W.B. Kendr., Dictyochaeta anamorfo de Chaetosphaeria dingleyae S. Hughes, W.B. Kendr. & Shoemaker, Dictyochaeta anamorfo de Chaetosphaeria pulchriseta S. Hughes, W.B. Kendr. & Shoemaker, Eversia parvula Hol.-Jech., Gyrothrix hughesii Piroz. e Minimelanolocus navicularis (R.F. Castañeda) R.F. Castañeda são novos registros para a América do Sul; Endophragmiella pallescens B. Sutton, Helicoubisia coronata Lunghini & Rambelli e Selenodriella ponmudiensis (Varghese & V.G. Rao) R.F. Castañeda & Saikawa são reportados pela primeira vez para o Brasil. Descrições, comentários, distribuição geográfica e ilustrações são apresentados para estas espécies.
Este trabalho trata da aplicabilidade da tecnologia Resource Description Framework – RDF na interoperabilidade entre diferentes domínios. O objetivo específico é apresentar uma estratégia para promover a interoperabilidade entre domínios na Web. Sua aplicabilidade é demonstrada por um estudo de caso com dois domínios: Anúncios Classificados e Serviços de Cartórios.
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