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Low-cost automatic station for compost temperature monitoring/Estacao automatica de baixo custo para monitoramento de temperatura da compostagem

Temperature monitoring is an important procedure to control the composting process. Due to cost limitation, temperature monitoring is manual and with daily sampling resolution. The objective of this study was to develop an automatic station with US$ 150 dollars, able to monitor air temperature at tw...

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Bibliographic Details
Published in:Revista brasileira de engenharia agrĂ­cola e ambiental 2017-11, Vol.21 (11), p.809
Main Authors: Jordao, Marcelo D.L, de Paiva, Kary, Firmo, Heloisa T, Inacio, Caio T, Filho, Otto C. Rotunno, de A. e Lima, Tome
Format: Article
Language:Spanish
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Summary:Temperature monitoring is an important procedure to control the composting process. Due to cost limitation, temperature monitoring is manual and with daily sampling resolution. The objective of this study was to develop an automatic station with US$ 150 dollars, able to monitor air temperature at two different points in a compost pile, with a 5-min time resolution. In the calibration test, the sensors showed an estimated uncertainty from [+ or -] 1 to [+ or -] 1.9[degrees]C. In the field validation test, the station guaranteed secure autonomy for seven days and endured high humidity and extreme temperature (> 70[degrees]C). Key words: organic waste automation social technology Arduino Em uma unidade de compostagem, o monitoramento da temperatura e fundamental para o controle do processo de compostagem. Devido a limitacao de custo, o monitoramento da temperatura e manual e com resolucao amostral diaria. O objetivo do estudo foi desenvolver uma estacao automatica de US$ 150 dolares capaz de monitorar, a cada cinco minutos, a temperatura do ar em dois pontos diferentes de uma leira de compostagem. No teste de calibracao, os sensores apresentaram uma incerteza estimada entre [+ or -] 1 a [+ or -] 1,9[degrees]C. No teste de validacao de campo, a estacao garantiu autonomia segura por sete dias e suportou condicoes de temperatura extremas (> 70[degrees]C). Palavras-chave: residuos organicos automacao tecnologia social Arduino
ISSN:1415-4366
DOI:10.1590/1807-1929/agriambi.v21n11p809-813