Over the next 14 months, German biogas plant manufacturer Weltec Biopower, with branches in North and South America, will establish a biogas plant in Aurora, Melbourne. Weltec is partnering with Aquatec Maxcon for the project. The 1 MW plant for the anaerobic digestion of organic waste will be one of the first of its kind in Australia.
The two stainless-steel digesters in Aurora, each of which has a capacity of 3,573m³, will be fed with 100 tons of organic waste a day. More than half of this amount will come from cafeterias and restaurants. The rest will comprise of fats and oils, brewery and dairy leftovers, fruit and vegetable waste and sludge that will be pumped from the adjacent wastewater treatment plant. After the digestion process, the substrate will first be sanitised and then buffered in a stainless-steel tank of 4,531m³.
A custom-tailored input process will be set up to ensure uninterrupted supply of the biogas plant. At the delivery area, the feed stocks will first be loaded into two 35m³ solids hopper feeder. Part of the substrates, such as melon peels, will first be shredded and then further chopped up with other raw materials and mixed with recirculation fluid in the MULTIMix system. After this preliminary treatment, the mixture will be pumped into the largest of the five stainless-steel pre-storage tanks with a total volume of almost 700m³.