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

Jurnal Teknosains Pub Date : 2024-05-19 DOI:10.22146/teknosains.91936

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

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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.

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用于监测沼气的集成微控制器 mq 传感器：甲烷和硫化氢检测技术的进步

微控制器系统的最新技术进步实现了新型沼气监测功能。本研究调查了基于微控制器的厌氧发酵产生的沼气中甲烷和硫化氢浓度的定量。厌氧消化器以 100% 牛粪为基质，或以牛粪与城市固体废物（MSW）50:50 的比例混合为基质。甲烷含量用 MQ-4 传感器监测，硫化氢用 MQ-136 传感器监测，温度用 K 型热电偶监测，所有这些都与 ATmega 2560 微控制器系统集成。与牛粪和城市生活垃圾按 50:50 的比例混合相比，100% 牛粪沼气池在 21 天后产生的沼气中甲烷浓度最高达 3488 ppm。100% 牛粪和混合消化器的硫化氢浓度分别达到 195 ppm 和 192 ppm。整个消化过程都保持了嗜中性温度条件。沼气成分的实时定量证明了基于微控制器的厌氧消化器监测能够提供精确的甲烷和硫化氢测量值。

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Jurnal Teknosains

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