Experience in the Operation of Mechanical-Biological Waste Treatment Plants - Report by the Operator of a German MBT Plant (Hannover) -

In the Hannover region, non-recyclable waste generated is either subjected to mechanicalbiological treatment (being utilised as a high-calorific fraction following material-flowspecific treatment) or undergoes direct thermal use. After having been in operation for six years, many parts of the mechanical-biological treatment (MBT) plant in Hannover have undergone technical and cost-effectiveness optimisation. The key areas involved were personnel-related operational organisation, the separating out of heavy materials prior to fermentation, the production of (and energy recovery from) fermentation gas, and the exhaust air treatment facility. The energy produced from fermentation gas (i.e. electricity and heat) helps to ensure that the waste treatment plants in Hannover are almost completely energy-self-sufficient, that considerable quantities of power can be fed into the public grid on a commercial basis, and that only small quantities of electricity have to be bought in from outside to cover the shortfall. Additionally, energy efficiency was investigated and a carbon audit performed for Hannover’s MBT plant in association with various methods of treatment for the high-calorific fraction.

 

 

 

 

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© Lexxion Verlagsgesellschaft mbH (6/2025)
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