Design and Assessment of a Low-Cost, Autonomous, Methane-Ebullition Measurement Apparatus (MEMA)
Date of Award
Bachelor of Science (B.S.) in Mechanical Engineering and University Honors
Mechanical and Materials Engineering
Atmospheric methane -- Measurement, Ebullition
Water reservoirs are increasingly recognized as a significant anthropogenic source of methane (CH4) production and emissions, CH4 being the second most prevalent greenhouse gas (GHG) after CO2. The dominant emission pathway for CH4 in lacustrine environments is ebullition (bubbling). A survey of current ebullition measurement methods reveals a technology gap; the ability to measure ebullition rates and CH4 content simultaneously and affordably with high temporal and spatial resolution is not currently available. Characterizing and modeling methane ebullition in water reservoirs is key to quantifying lacustrine methane emissions and providing a basis for potential mitigation efforts. This report documents the development and assessment of a Methane Ebullition Measurement Apparatus (MEMA) designed for in-situ, autonomous, ebullition-rate and methane-concentration measurement in lacustrine environments. MEMA is designed to be affordable and easily replicable in-house by environmental research scientists with limited manufacturing resources, emphasizing low per-unit cost for maximum unit replication and spatial coverage. Documentation of the device's build materials, supplier list, physical design, and control code have all been made publicly available to aid in replication efforts.
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Frattaroli, Francesca, "Design and Assessment of a Low-Cost, Autonomous, Methane-Ebullition Measurement Apparatus (MEMA)" (2017). University Honors Theses. Paper 422.