WASTE TO ENERGY
NEW BIOMETHANE PLANT BUILT IN ALSACE E
TW Energietechnik has built a biomethane plant in Rittershoffen, in Alsace, in cooperation with the planning office Rytec from Baden Baden. The processing capacity of the plant, which went into operation in February 2023, is about 700 normal m3
of raw biogas per hour.
This means that up to 350 normal m3
of biomethane are fed into the natural gas grid every hour. This is roughly equivalent to the average
fuel consumption of 20,000 cars. The project was initiated by three
young, visionary farmers from Alsace who are committed to environmental protection and regenerative energies and want to promote sustainable agricultural use in the region. Only agricultural residues from the
immediate surroundings are used as substrates. The very low power consumption
of 137.6kw electric makes ETW‘s plant state of the art for biomethane plants of this size class. This reduces the risk of future electricity price increases. Even with a downstream
high-pressure compression plant, which compresses the processed biomethane to 67.7 barg and feeds it into the natural gas grid, the power consumption of the entire plant is less than 202kw electrically, significantly lower than comparable products on the market. The entire plant consumes less than 7% of the energy provided by the biomethane. When designing the plant
technology for fermentation of the diverse residual materials, emphasis was placed on the highest quality. The ETW SmartCycle biomethane plant is correspondingly high-quality, reliable and low-maintenance. l
For more information visit
www.etw-energie.de
THREE BIOGAS PLANTS FOR GREECE T
he Greek agricultural sector has trusted Weltec Biopower’s biogas technologies since 2007 – and this trend is continuing. Most recently, three biogas plants were built, which the German manufacturer designed together with its Greek cooperation partner Tetoros Machinery. Two of these are located in the Epirus region, in northwestern Greece: a 1MW plant in the town of Arta and a 500kw plant in Ioannina. The third one, a 250kw biogas plant project, was realised in Serres, in central Macedonia.
Here, an upgrade of the CHP plant to 750kw is also being implemented. The plant in Ioannina will go into
production in the fall of 2023. At the plant in Arta, 150 tons of
cattle slurry and 50 tons of dry chicken manure are processed daily. At the biogas plant site in Ioannina, the daily input is made up of 100 tons of cattle slurry and 30 tons of dry chicken manure. And in Serres, a substrate mix of 40 tons of cattle manure and 10 tons of energy plants enters the stainless steel digester daily. At all three sites, the
materials are first sent to a pre-storage tank. Special agitators and pump technology ensures the pretreatment. In the digesters, the proven agitators then mix the substrates for efficient biogas production. The two digesters in Arta each hold 4436 cbm, in Ioannina there is a 3993-cbm digester, and
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the tank in Serres measures 4905 cbm. “All tanks are made of high-grade stainless steel,” specifies the responsible process engineer at Weltec Biopower, Tobias Peuker. According to him, the fermentation residue from the digester with its high nutrient content can also be used as fertiliser afterwards. The three biogas projects are an
important part of the Greek energy transition. Weltec Biopower has already implemented a total of around 36 biogas plants and projects there since 2007. And the path to decarbonisation continues to make progress: in the summer of 2023, Greece’s entire one- day energy demand could have been supplied from renewable energy sources for the first time. “This means we are well on our way and will continue to make our contribution to achieving the goal,” predicts Greek sales partner, John Tetoros. l
For more information visit
www.weltec-biopower.com
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