BioAuto - Treatment of biogenic residual and waste materials by autoclaving

Project management:



Tim-Andre Kulbeik, M.Sc.

Marvin Scherzinger, M.Sc.

Prof. Dr.-Ing. Martin Kaltschmitt

Funding:Federal Ministry for Economic Affairs and Energy (BMWi)
Project partners:ETH Umwelttechnik GmbH
Associaerted partners:Stadtreinigung Hamburg A.ö.R.
Running term:02/2017 - 02/2021

Communal disposal generates large quantities of biogenic material flows such as leaves and green waste, which are currently used only to a very limited extent or not at all for energy use. In most cases, further use as an energy source is not feasible due to insufficient fuel quality and limited shelf life.

In this case, the autoclaving process could be a cost-effective alternative. The process involves heating moist biomass to temperatures between 120 and 180 °C in a pressure reactor. Partially evaporating water from the biomass forms a pressure which approximately follows the saturation vapor pressure of water. The aim of this process is the production of a storable, pollutant-free and high-quality biogenic solid fuel. This process is also analyzed and evaluated on the basis of economic and ecological criteria and by balancing the process.

Further information can be found here.

                     grass clippings                                          60 Liter autoclav                                    autoclaved grass clippings