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Recycling management with biogas

In 2002 we were commissioned to plan and engineer a biogas plant for waste management company Stipits in Rechnitz, in southern Burgenland.

Since 2003 the plant feeds electricity into the public network. The waste heat from the biogas plant is used for warm water and for cleaning garbage cans and garbage trucks. Until 2008, 10.000t of non-hayardous waste and renewable resources were fed into the biogas plant. With the output of the plant we produced ca. 220m3 biogas/h and a block heat and power plant of 600 kWelectric could be operated.

The plant consists of three storage units into which different substrates are fed (waste food, renewable resources, fat separators). Through 4 pipe-fermenters and 3 post-fermenters the carbonaceous resources are fermented.

As the company needed additional heat for heating and drying of fats and oils, leftovers in cans and deep frozen goods, abattoir waste and other garbage, we planned, engineered and implemented a biomass run local heating plant for the company in 2009 with an output of 480kW.

In the areas of drying and heating we put up mobile drying containers, in which organic materials can be dried, or residue fats and oils can be reheated. The drying containers are supplied with warm air via an overground supply system. The making of warm air happens through a ventilation appliance with an integrated warm water recuperator. The warm water needed, is supplied by the repository of the local heat plant run on biomass and from waste heat from the biogas plant.

Biogas as fuel

The biogas production capacity has now been increased to 300 m3 / h by a material flow increase to approximately 15,000 t / year.
So the 3rd pioneering step of waste management company Stipits was developed and implemented: the planning and implementation of a biogas processing for the production of high-quality, purified biogas as fuel.
The purest biogas produced in this innovative system is used for fueling of converted vehicles and the company's own waste trucks.
The biogas comes from the already existing biogas plant. The block heating plant supplies a part of it's electric output to the gas treatment plant. This was made possible by the increased supply of raw materials and thus both the biogas and electricity production multiplied.
After the establishment of the biogas processing plant, currently we are working on the conversion of the company's truck fleet to operating on biogas and the establishment of a service station for the company's internal and public use.
Stipits, in long-term cooperation with our office for renewable energy is making a Best Practice example of the development and implementation of a holistic and sustainable biogas project to stop climate change.