Biogas analyser

Uniflare’s expertise in designing, manufacturing and installing landfill and waste gas control treatment and utilisation equipment, combined with Allison Engineering’s range of innovative gas analysers, has enabled Cory Waste Management to protect its combined, heat and power (CHP) plant at minimal installation and operational cost.

As part of the overall Uniflare gas train package the desulphurisation system features the Allison Engineering AWITE Biogas analyser which is supplied with its own air compressor and uses a combination of PID and Fuzzy Logic control to automate the injection of small quantities of air (0.5 to 1%) into the gas stream within the digester. The oxygen converts the Hydrogen Sulphide (H2S) to elemental sulphur and water, a process which is automatic and does not require any operator input, eliminating additional operational and maintenance costs.

James Hladkij, the AD technician at the Cory Waste Management site, said: "We need to protect our CHP plant operations and maintaining H2S concentration levels to less than 300ppm is an essential part of this process. The Uniflare system has enabled us to achieve levels of less than 100ppm and at minimal operational cost." 

The Awite range comprises the Awi-Eco, a low cost, compact discontinuous analyser which provides 50 CH4 and CO2 measurements per day, with 4-20mA output and USB connection. For more sophisticated monitoring and analysis requirements the Awi-Flex provides continuous measurement for CH4, CO2, H2S, O2 and H2.  This system provides up to 5 measuring points; Ethernet, Profibus, Modbus and USB connection.  Most importantly, it can also be used to take flow, temperature and pressure inputs and undertake automated desulphurisation control.