KompaGG-N - Complete Treatment of Manure and Digestate: Process Developement in Consideration of Regional Substance Flow Concepts for Nutrients and Pollutants

Due to the tightening of German fertilizing laws in 2017 an increasing pressure on cost and land is developing in mainly agriculturally structured areas.  In particular due to the high nitrate contamination of German aquifers the importance of the management and treatment of manure and digestate increases ever more.

The goal of KompaGG-N is to identify robust and economically viable process chains for the complete treatment for manure and digestate. 

Through this a relief for agricultural businesses and a reduction of the environmentally harmful nutrient surplus shall be achieved. The focus lies on two distinct treatment techniques. Through the SEQUESTA process (sequential evaporation) of BIORESTEC GmbH a marketable ammonia solution can be produced while reducing the amount of manure or digestate needy of disposal. The TERRAMOX® process (deammonification) of E&P Analgenbau GmbH is a process already established on an industrial scale for the treatment of processwaters accruing in municipal sludge treatment which allows for an energy-efficient nitrogen reduction. Furthermore the effects of a solid separation on the process stability will be investigated. With the completion of the project, in addition to the advancement and adjusted optimization of said techniques, a specifically adjustable and economically viable process chain can be provided to the originators of manure and digestate.

The project is funded by the Federal Ministry of Education and Research (BMBF) within the program “KMU-innovativ”.