The leachate at Stockstadt landfill is currently being collected into tanks at 7 locations and the transported to the waste water treatment plant Aschaffenburg. A 2018 tender asked for alternative treatment concepts. TDL Energie won the tender and was awarded the contract. In the future the leachate is to be treated at a newly erected activated carbon plant on the premises. The activated carbon can reduce the AOX and CSB concentrations to indirect discharge quality. The treated leachate is then transported to the waste water treatment plant Aschaffenburg. The plant will be designed, manufactured and operated within the frame of a BOT agreement.