AT the UK’s first viable compact anaerobic digester plant aimed at local food waste treatment, a Geotech GA3000 fixed biogas analyser monitors methane, carbon dioxide, oxygen and hydrogen sulphide.
The plant, a modular scalable AD system unveiled by React Environmental at Llangadog, Carmarthenshire, can handle 1,000 to 5,000 tonnes of food waste a year and React’s Arrash Shirani said the monitor has been useful in determining the health of the system and showing how effective different system configurations are, for example different digester operating temperatures. He added: “We built the plant as a prototype and demonstration unit so we needed to monitor the process carefully and be able to show potential clients how effectively it is working.”
The GA3000 monitoring system is designed to help optimise AD production and provide combined heat and power (CHP) engine protection and restart. This makes it very well matched equipment for biogas plants and landfill sites generating electrical power. Although an ‘entry level’ automatic fixed position biogas analyser, the GA3000 provides full round-the-clock analysis. A 4-20mA output for each gas is standard, as is Modbus digital output, allowing communication with SCADA systems. Alarm relays are user configurable and it is ATEX Zone 2 certified.