Integrated microcontroller mq sensors for monitoring biogas: Advancements in methane and hydrogen sulfide detection

I Gede Artha Negara; Daud Simon Anakottapary; Ida Bagus Gde Widiantara; Luh Putu Ike Midiani; Tjokorda Gde Tirta Nindhia; I Gusti Ngurah Nitya Santhiarsa

doi:10.22146/teknosains.91936

Integrated microcontroller mq sensors for monitoring biogas: Advancements in methane and hydrogen sulfide detection

https://doi.org/10.22146/teknosains.91936

I Gede Artha Negara^(1*), Daud Simon Anakottapary⁽²⁾, Ida Bagus Gde Widiantara⁽³⁾, Luh Putu Ike Midiani⁽⁴⁾, Tjokorda Gde Tirta Nindhia⁽⁵⁾, I Gusti Ngurah Nitya Santhiarsa⁽⁶⁾

(1) Bali State Polytechnic
(2) Bali State Polytechnic
(3) Bali State Polytechnic
(4) Bali State Polytechnic
(5) Udayana University
(6) Udayana University
(*) Corresponding Author

Abstract

Recent technological advances in microcontroller systems enable novel biogas monitoring capabilities. This study investigates microcontroller-based quantification of methane and hydrogen sulfide concentrations in biogas derived from anaerobic digestion. Anaerobic digesters were fed either 100% cow dung substrates or a 50:50 mixture of cow dung with municipal solid waste (MSW). Methane levels were monitored using an MQ-4 sensor, hydrogen sulfide via an MQ-136 sensor, and temperature with a K-type thermocouple, all integrated with an ATmega 2560 microcontroller system. The 100% cow dung digester produced biogas with maximum methane concentrations of 3488 ppm at 21 days, indicating improved methane production compared to the 50:50 mixture of cow dung with MSW. Hydrogen sulfide reached 195 ppm and 192 ppm for the 100% cow dung and mixed digesters. Mesophilic temperature conditions were maintained throughout the digestion process. Real-time quantification of biogas composition demonstrates the capabilities of microcontroller-based anaerobic digester monitoring to provide precise methane and hydrogen sulfide measurements.

Keywords

Biogas; Microcontroller; Monitoring; MQ sensors; Methane; Hydrogen sulfide

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References

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DOI: https://doi.org/10.22146/teknosains.91936

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