Advancing environmental stewardship: leveraging technology to measure, monitor and mitigate methane emissions from digester breather valves: PRESENTATION ONLY

Proceedings

Operating Pressure range <1 barg. Most <30mbarg

◦ Final emergency pressure relief from digesters

 Biogas used for electricity/gas generation

 Excess to flare

 Emergency relief via pressure/vacuum vent

All valves should meet international standards API2000 or ISO28300
No specific biogas standard. Application in process.
Valve will begin to open from 75% of set point
Many digesters run <90% of MAWP
9 out of 10 valve manufacturers do not test production vents according to section 5.4 (API2000) 6.4 (ISO28300)

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Proceedings