b'RENEWABLE ENERGY INITIATIVESbiomass gasification plant was burnt and the combustion gases were analysed in terms of particle content and combustion efficiency. RISE also investigated tissue drying with a mini-Yankee cylinder, whereupon the tissue paper samples were analysed in terms of odor and visual damage.The result showed:No odour or visual damageSufficient heating valueLow level of particles in the exhaust gasesStable and very even combustion without any need to enrich the syngasThese tests were conducted with a swirl burner. Since then, the tests have been followed up by commercial burner manufacturers to investigate whether more conventional burners for tissue drying hoods can accept multi fuels. It works in both duct and corner burners Figure 3. The Meva Circularity Process.It is possible to co-fire LPG/NG and renewable syngas in the same burner with gas produced from anaerobicHence, the capital expenditure for a No need to redesign or expanddigestion of sewage sludge or manure,thermochemical conversion process is existing burner chambers i.e. a wet slurry. The technologylower, per MWh of energy.developed by Meva Energy is a These results mean that the transitionthermochemical conversion processThere are several technologies for from fossil fuels to a renewable gaswhich uses solid biomass, e.g. woodThe transitionthermochemical conversion: fixed alternative can be achieved relativelyor agricultural residues. The energyfrom fossilbed, updraft, downdraft, fluidized simply. It also therefore permits thecontent in the feedstock differs with afuels to abed etc. What makes the technology existing infrastructure to be kept asfactor of one thousand between theserenewable gasof Meva Energy so interesting for this a redundancy, with only the burnersproduction methods; this means thatalternativeapplication is the patented entrained needing to be exchanged for multi- in order to achieve the same output,can beflow principle. Biomass particles fuel types. the reactor of the anaerobic digestionachievedare entered into the hot reactor at a plant must be much larger than therelativelycontinuous flow, leading to a process Syngas is normally associatedthermochemical conversion process.simply. that gives a stable gas quality. 74 TISSUE TECHNOLOGY INTERNATIONAL'