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	Provedor de dados Ciência Rural (1) REA (1) Autor Barcelos,Sheyla Thays Vieira (1) Cereda,Marney Pascoli (1) Santos,Neisvaldo B. dos (1) Tomielis,Ismael Plácido (1) Palavra-chave Sugarcane mill (2) Agricultural mechanization (1) Computer model (1) Cost (1) Free calcium (1) Hydraulic retention time (1) Mill revenue (1) Planning and management (1) VA/TA (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2019 (1) 2017 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última ECONOMIC ANALYSIS OF DIFFERENT HYDRAULIC SPRAYERS USED IN SUGARCANE (Saccharum spp.) REA Santos,Neisvaldo B. dos. ABSTRACT Brazil is the largest sugarcane producer worldwide. In mills, sugarcane crops are sprayed with agrochemicals using self-propelled, tractor-driven, and aerial hydraulic sprayers. As sugarcane spraying is regularly performed over extensive areas, the machinery to be used should be planned and dimensioned to ensure timely operations without overloading and at lower costs. Therefore, the current study aimed to analyze the operational and economic performances of different hydraulic sprayers to perform sugarcane crop control. As long as meeting our goal in field conditions would be difficult, we opted to develop a computational model, named as “TratoCana”, using a spreadsheet and programming language. The model was used to assess economic and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural mechanization; Computer model; Cost; Mill revenue; Planning and management; Sugarcane mill. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000200225 Hydraulic retention time on vinasse stabilisation with limestone in the acidogenic phase of anaerobic digestion Ciência Rural Tomielis,Ismael Plácido; Barcelos,Sheyla Thays Vieira; Cereda,Marney Pascoli. ABSTRACT: The main problem in anaerobic digestion of low-protein residues is the instability caused acidity. The use of limestone at the same time as a neutralizing agent and support material is innovative because stones wear allows the slow release of the calcium carbonate thereby eliminating dispersers. Free calcium content in the system was measured in two plug flow reactors filled with vinasse at initial pH of 4.50. The proportion of 1.8 tonnes of limestone per m³ of vinasse was evaluated at the Hydraulic Retention Times (HRT) of 24, 48, 72, 96 and 120 hours, allowing stabilisation at 96 hours. The ratio of Volatile Acids/Total Alkalinity (VA/TA) ranged from 0.2 to 0.4 and the pH reached 7.0, at the HRT of 120 hours. Increasing the HRT also increased... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydraulic retention time; Sugarcane mill; Free calcium; VA/TA. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900931 Registros recuperados: 2 Primeira ... 1 ... Última

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