Advancing environmental stewardship: leveraging technology to measure, monitor and mitigate methane emissions from digester breather valves: PRESENTATION ONLY
Ewart Cox, Assentech Sales, UK
(Free)
Mission: Reduce fugitive emissions from digesters
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)