Abstract
This study aims to present a novel gas counter and to demonstrate its suitability for biochemical methane potential tests. In this system, the gas to be measured is collected in a chamber enclosed with two one-way solenoid valves and the absolute pressure is continuously monitored. After a trigger pressure is reached, a portion of the gas is released and the amount of the released gas is calculated according to ideal gas law and recorded. Three iterations of the supervisory control and data acquisition unit were constructed and tested for BMP measurement. Although it can be further improved and variations are possible, the presented final version works with eight reactors simultaneously and the recommended maximum gas flow is 1.24 mL/min. For those reactors, the measured/theoretical BMP ratio was 65.3% with 4.2% standard uncertainty, which is subjectively acceptable. Therefore, it can be concluded that the concept is valid and applicable to BMP tests.
Funding source: Harran University Scientific Research Projects Coordination Unit
Award Identifier / Grant number: 16121
Acknowledgements
Authors would like to thank to Dilara Öztürk for COD measurements; to Erbil Özdemir for modeling Figure 2(a); to Ezgi Piro, Bekir Biçer, and Ensar Ömer Çetin for their help during assembly of the setup; Ümit Budak for printing the circuit board of the SPI bus; Çağlar Küllü for grammar check; to Ömer Akgiray for his general support.
Author contributions: Ozan K. Bekmezci: Lead author, conceptualization, methodology, software, formal analysis, investigation, resources, data curation, writing-original draft preparation, writing-review and editing, visualization, project administration. Deniz Ucar: Resources, writing-review and editing, project administration, funding acquisition. Zehra Sapci Ayas: Methodology, resources, data curation, writing-review and editing, supervision, project administration.
Research funding: This work was supported by Harran University Scientific Research Projects Coordination Unit (HUBAK, project no. 16121).
Conflict of interest statement: The corresponding author considers participating in the commercialization of any product based on the proposed system. The details of this research will be published in his PhD thesis.
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