Design of Oxygen Levels Monitoring and Controlling Systems for Cascara Vinegar Acid Production in Bioreactor Duwi Hariyanto(1)(a), Afit Miranto(2), Muhammad Nur Rafif(2), Daffa Naufal(2), Muhammad Pramudhitya Hernanda(2), Ilham Marvie(3)
(1) Instrumentation and Automation Engineering Department, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Lampung Selatan, Indonesia
(2) Electrical Engineering Department, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Lampung Selatan, Indonesia
(3) Food Technology Department, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Lampung Selatan, Indonesia
Automation technology could increase flexibility and efficiency, especially in the production of foodstuffs. Processing coffee peel (cascara) into vinegar acid is important to reduce waste and increase selling value. This study intended to design monitoring and controlling systems of oxygen levels in a bioreactor producing cascara vinegar acid. The oxygen sensor SKU:SEN0322 brand DF Robot integrated the Raspberry Pi 4 microcontroller was utilized to monitor and control oxygen levels during the cascara fermentation process. The microcontroller was programmed to ensure that there was no oxygen in the cascara anaerobic fermentation process and to deliver oxygen to the bioreactor in the aerobic process if non-optimal oxygen levels detected. Programming languages based on Python and Java were used to program the microcontroller. Visual Studio code editing software was employed to write, edit, and upload programs to the microcontroller. The results showed that the oxygen sensor was appropriate for monitoring oxygen levels in the cascara fermentation process.
