Energy-optimized sewage sludge incineration at Hanover-Lahe

enercity Contracting GmbH has also opted for the disposal path of thermal sewage sludge utilisation. At thebeginning of 2020, sludge2energy GmbH was commissioned as general contractor with the planning and
construction of a sewage sludge mono-incineration plant at Hanover-Lahe. Both mechanically dewatered and externally fully dried municipal sewage sludge are to be recycled in
the plant, which will have a total annual capacity of 30,000 t DS (dry substance). This corresponds to a quantity of approx. 130,000 t dewatered sewage sludge with a dry matter content of approx. 22%.

The main process engineering components of the plant are the two RotaDry® disc dryers, the S2E Fluidizer - a stationary fluidized bed furnace - including boiler, the backpressure steam turbine for optimum power yield with the greatest possible flexibility in plant operation, and the flue gas cleaning system to ensure compliance with the permissible emission limits.

In addition to thermal and electrical self-sufficiency, the primary premise in the planning and realisation of the Hanover-Lahe waste incineration plant is the maximum possible extraction of environmentally friendly heat, from which approx. 5,000 households are to benefit via the regional district heating network.

The project is currently in the phase of implementation planning; the groundbreaking ceremony for the start of construction work is planned for the fourth quarter of 2020. Regular operation of the plant is scheduled for the turn of the year 2022/2023.

Plant features:

  • Optimised, maximum extraction for district heating
  • Adapted impurity management
  • Thermally and electrically energy self-sufficient

Plant parameters:

  • 10.57 MW
  • 30,000 tDS/a
  • 130,000 t/a