Influence of two different solid-liquid separation processes on the settling characteristics of swine effluent.

ABSTRACT: Solid-liquid separation (SLS) in swine manure treatment is an important step due to a substantial amount of organic and inorganic solids that can be removed from liquid wastewater. The aim of this study was to evaluate the efficiency of two mechanical separation processes (screw press and rotary screen) followed by settling and to analyze the composition of liquid fractions. In this sense, total solids (TS), volatile solids (VS), fixed solids (FS), total phosphorous (TP), total Kjeldahl nitrogen (TKN) and total organic carbon (TOC) were analyzed. By combining mechanical separation with settling, the average of TS, VS and FS removal was 75%, 80% and 69%, respectively. Phosphorus removal reached 86%, and TKN achieved a reduction up to 45%. There was no statistical difference among the results obtained using SLS by screw press and rotary screen. It was possible to conclude that SLS process with mechanical devices, followed by settling, generates a suitable effluent to be used on nitrification and denitrification process, producing an effluent with a C/N ratio of 2.6, and the solid fraction is useful to anaerobic digestion

why should we care about it?

Funding Information: and abroad registered and certified in the National Council for Scientific and Technological Development (CNPq) directory working in this area. According to the catalog of the Brazilian Federal Foundation for Support and Evaluation of Graduate Education (CAPES), nearly 50 theses or dissertations have been produced in this field since 2017. In descending order, the prominent areas include Nursing, Public Health, Pharmacy, Medicine, Biological Sciences, Physical Education, Physiotherapy, Occupational Therapy, Nutrition, Psychology, Administration, Social and Political Sciences, and Education.publishersversionpublishe

Persistence of Attract & Kill formulations of Anastrepha Fraterculus: greenhouse and rain-fast experiments.

Food attractans associated with pesticides have been used as a strategy for management of fruit files in fruit growing areas of Southern Brazil.Resumo

Análise quantitativa sobre a mortalidade precoce de micro e pequenas empresas da cidade de São Paulo A quantitative analysis of the premature mortality of small companies in the city of São Paulo

O vigor da economia de vários países tem origem no sucesso de pequenas empresas. No Brasil, o Estado de São Paulo concentra mais da metade das empresas brasileiras de pequeno porte. Assim sendo, estudos sobre o sucesso ou o insucesso de micro e pequenas empresas têm sua relevância enaltecida. Este estudo busca apresentar uma análise quantitativa e qualitativa sobre os fatores associados à mortalidade precoce das micro e pequenas empresas. Para tanto, realizou-se uma pesquisa com os gestores de micro e pequenas empresas da cidade de São Paulo que encerraram suas atividades. Para análise quantitativa da amostra, que apresenta representatividade estatística, utilizou-se de técnicas de análise multivariada. Como principal resultado, pode-se destacar que os fatores associados à mortalidade são preponderantemente de natureza estratégica, o que contraria o senso comum que professa a insuficiência de recursos como principal motivador da falência das pequenas empresas. Tal resultado tem importância para orientar as políticas públicas, os empreendedores e as agências de fomento para a formulação de suas estratégias no sentido do desenvolvimento de competências administrativas para o sucesso das micro e pequenas empresas brasileiras.<br>The economic vigor of many countries is due to the success of small businesses. In Brazil, Sao Paulo state concentrates more than half of Brazilian small businesses. Therefore, studies dealing with high or low performance of micro and small businesses are of great relevance. This study aims at presenting a quantitative and qualitative analysis of factors associated to premature mortality of micro and small businesses in the city of Sao Paulo. For the quantitative analysis of the sample, which is statistically significant, multivariate analysis was used. The main result of this investigation is that factors associated with mortality are mainly of strategic nature, contrary to the common belief that resource insufficiency is the main reason for the closing of small businesses. This result may contribute to guide public policies, entrepreneurs, and research funding agencies on the formulation of their strategies with regard to the development of managerial competencies and skills for the success of micro and small businesses in Brazil

Moléstia de Creutzfeldt-Jakob: estudo clínico, histopatológico e eletromicroscópico de um caso

É apresentado o caso de paciente de 53 anos de idade com quadro de rebaixamento mental e comprometimento piramidal, com evolução progressiva até mutismo acinético em 6 meses de evolução. Um pneumencefalograma mostrou aumento simétrico do sistema ventricular. Uma biópsia cerebral permitiu encontrar alterações neuronais, gliose e estado espongioso que permitiram classificar o caso como de moléstia de Creutzfeldt-Jakob. São discutidos os achados eletromicroscópicos