Efeito da aplicação de água residuária da lavagem dos frutos de café sobre as propriedades químicas do solo

Silva, George B.; Rolim, Mário M.; Pedrosa, Elvira M. R.; Silva, Enio F. F

doi:10.1590/s0100-69162011000100016

Cited by 9 publications

(8 citation statements)

References 8 publications

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“…adsorption because it favors cation exchange processes in the soil (SILVA et al, 2011a). This may explain the decrease in the Ca 2+ contents of the soils in this research.…”

Section: +mentioning

confidence: 62%

Soil chemical alterations of a Dystroferric Red Latosol (Oxisol) treated with an alkaline effluent from a pharmaceutical industry

Neto

Batista

Inoue

et al. 2016

SCA

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Effluents from different industrial supply conglomerates are often discarded in the environment without proper treatment. The concern for an economically viable industrial production line, which is both environmentally sound and socially acceptable, is increasing. Some of these effluents are alkaline in nature and may be used as an alternative to chemical conditioners for acidic soils in agricultural systems. This research aimed to evaluate changes in the chemical attributes of a Dystroferric Red Latosol (Oxisol) after application of an effluent from a pharmaceutical industry. The experiment was conducted in a greenhouse using PVC tubes of 1-m length and a 0.2-m diameter filled with soil and different doses of the effluent. After 3 days, 100 mm of water was applied to each treatment. The PVC tubes were incubated for 30 days; thereafter, the tubes disassembled, and soil chemical analysis were ResumoOs efluentes das diversas cadeias produtivas industriais são muitas vezes descartados no ambiente sem tratamento adequado. A preocupação por uma linha de produção industrial economicamente viável, ambientalmente correta e socialmente aceita é cada vez mais preconizada. Alguns desses efluentes apresentam caráter alcalino, e podem ser utilizados como condicionadores químicos de solos ácidos, em sistemas agrícolas. Objetivou-se com a realização do presente trabalho, avaliar alterações químicas de um LATOSSOLO VERMELHO distroférrico, após aplicação de efluente da indústria farmacêutica. O experimento foi realizado em casa de vegetação e conduzido em tubos de PVC de 1 m de comprimento e 0,2 m de diâmetro. Nos tubos, preenchidos com solo, foram aplicadas diferentes doses do efluente. Após 3 dias, 100 mm de água foi aplicado sobre cada tratamento. As colunas foram incubadas por 30 dias, posteriormente desmontadas e feitas análises químicas nas diferentes profundidades: 0-0,2; 0, 2-0,4; 0,4-0,6; 0,6-0,8 e 0,8-1,0

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“…adsorption because it favors cation exchange processes in the soil (SILVA et al, 2011a). This may explain the decrease in the Ca 2+ contents of the soils in this research.…”

Section: +mentioning

confidence: 62%

Soil chemical alterations of a Dystroferric Red Latosol (Oxisol) treated with an alkaline effluent from a pharmaceutical industry

Neto

Batista

Inoue

et al. 2016

SCA

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“…Only with appropriate production techniques is it possible to produce highquality coffee. Coffee is an agricultural product whose value is based on qualitative parameters that determine its price and can vary considerably, depending on their management (SILVA et al, 2011;AFONSO JÚNIOR;OLIVEIRA FILHO;COSTA, 2006;SAATH et al, 2010). Therefore, a broad knowledge of coffee cultivation is essential to the machinery designer.…”

Section: Introductionmentioning

confidence: 99%

Computer-aided design of a coffee-dragging device

et al. 2014

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Dragging is the most costly and time-consuming stage of the coffee harvest. Therefore, its mechanization is important. The objectives of this study were to design, build, and evaluate the dynamics of a coffeedragging device in a laboratory setting. The prototype consists of a dragging device with rods mounted on a metal plate and a chassis. Computer-aided design (CAD) software was used to generate a solid second-order tetrahedral mesh for use in finite element analyses of the device and its parts. It was possible to simulate and display the device's errors and failures and generate data on part deformities, Von Mises tension, and equivalent efforts. Equations based on the Denavit-Hartenberg theory were developed to describe the dragging device kinematics, and the results obtained with these equations were compared to those for the design developed using the software program. A preliminary drawing analysis identified a lever-type system as the best configuration for the device, based on its simple construction and its ability to balance the weight of the project parts. The safety factor achieved was greater than 28. Adjustment of the vibration amplitude of the rods is possible using the eccentric shaft of the connecting rod drive. Finite element analyses was used to analyze the connecting rod and predict the likely failure points. Key words: Coffee Harvest, dragging prototype, CAD simulation ResumoNa colheita do café a etapa de derriça é a mais onerosa e que demanda maior tempo, por isso sua mecanização torna-se tão importante. Objetivou-se com este trabalho projetar, construir e avaliar a dinâmica de um dispositivo de derriça laboratorial para café. O protótipo consta de um dispositivo de derriça com hastes montadas em uma placa metálica e um chassi. O programa computacional CAD gerou uma malha sólida tetraédrica de segunda ordem por meio de análises de elementos finitos. Foi possível simular e mostrar erros ou falhas dos dispositivos e, também gerar dados, tais como a deformação da peça, tensão de Von Mises e esforços equivalentes. Para descrever a cinemática do dispositivo de derriça, foram desenvolvidas algumas equações baseadas na teoria de Denavit-Hartenberg, que foram comparadas ao projeto desenvolvido em programa computacional. A análise dos croquis apresentou o sistema tipo alavanca como a melhor configuração para o desenvolvimento do dispositivo, por ser de simples construção e que permita facilmente equilibrar as massas das peças do projeto. O fator de segurança alcançado foi superior à 28. O ajuste da amplitude de vibração das hastes foi possível com o eixo excêntrico de acionamento da biela. O estudo da biela e a previsão dos pontos de falha foi possível pela análise em elementos finitos. Palavras-chave: Colheita de café, protótipo de derriça, simulação em CAD

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“…The pH values were slightly higher than those observed by MARQUES (2009) who found values between 5.2 and 4.9 at depths of 0.20 and 0.40 m, respectively, in similar soil under application of 9.6 m 3 ha -1 of manipueira. SILVA et al (2011) evaluated the effect of wastewater from coffee culture with four doses in two incubation periods, and also found no significant effect on pH.…”

Section: Resultsmentioning

confidence: 99%

Physical, chemical and microbiological properties of a Dystrophic Yellow Latosol using manipueira

Júnior¹,

Coelho²,

Santana³

et al. 2012

Eng. Agríc.

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The study aimed to evaluate chemical, microbiological and hydro-physical changes of a Dystrophic Yellow Latosol, receiver of different levels of manipueira (cassava wastewater) application, in the cultivation of 'Terra Maranhão' banana. The experimental design was a randomized block with three replications in a factorial scheme 3 x 4, in which it was considered three soil depths and four levels of manipueira. It was evaluated the weighted mean diameter of the aggregate, the percentage of aggregation at different periods, soil density, particle density, porosity and soil saturated hydraulic conductivity, in addition to pH of P (mg dm -3), K (mg dm-3), Ca (cmolc dm-3), Mg (cmolc dm-3), Ca+Mg (cmolc dm-3), Al (cmolc dm-3), Na (cmolc dm -3), H+Al (cmolc dm-3), CEC (cmolc dm-3), V%, OM (g kg-1), soil microbial biomass (Ug Cg-1 dry soil), acid phosphatase (Ug PNP g-1 h-1). The use of manipueira influenced some physical characteristic of the soil, but it was not possible to specify the effect of increasing application dosage. Therefore, the application did not affect the biological indicators assessed in the soil or its pH. The use of manipueira as a fertilizer in the doses used in this study showed low increase of K, P, H+Al and Al in the soil and a good increase of Mg, Ca and Ca+Mg, Na, CEC and V%.

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Efeito da aplicação de água residuária da lavagem dos frutos de café sobre as propriedades químicas do solo

Cited by 9 publications

References 8 publications

Soil chemical alterations of a Dystroferric Red Latosol (Oxisol) treated with an alkaline effluent from a pharmaceutical industry

Soil chemical alterations of a Dystroferric Red Latosol (Oxisol) treated with an alkaline effluent from a pharmaceutical industry

Computer-aided design of a coffee-dragging device

Physical, chemical and microbiological properties of a Dystrophic Yellow Latosol using manipueira

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