Refuse Derived Fuels | Alternative fuels

Refuse Derived Fuels (RDF)

Our alternative fuels shredders enable you to optimally recycle waste into substitute fuels and ensure high quality by producing a homogeneous granulate free of foreign objects.

Co-processing of industrial waste in cement kiln

The goal of recycling is to use the valuable energy contained in the waste and to substitute the use of fossil fuels. During the recycling process the portions with a high calorific value are separated from the commercial and industrial waste and turned into a marketable product. Depending on the calorific value and the granular size, these fuels are used in fluidised bed combustion, cement plants and substitute fuel power plants.

The waste undergoes a single-phase or multi-phase recycling process to separate the fractions with a high calorific value from household waste, bulky waste, industrial waste, commercial waste and sorting residue. This process may consist of the following steps:

Single-phase recycling process:

  • Shredding
  • Separation of ferrous and non-ferrous materials

Two-phase recycling process:

  • Pre-shredding
  • Sifting process
  • Air separation
  • Separation of ferrous and non-ferrous materials
  • Ballistic separation
  • Separation of heavy materials
  • Optical sorting
  • Re-shredding

We are world leaders in this complex field of substitute fuel recycling. Regardless of whether you require single-phase or multi-phase shredding, we offer an economic and, first and foremost, reliable solution!


Utilization areas and fraction sizes of substitute fuels

  • Pre-shredded waste < 400 mm: The shredded material is particularly suitable for material recovery facilities (MRF)
  • Pre-shredded waste < 150 mm: This fraction size is suitable for co-generation power plants with grate firing, refuse combustion plants, material recovery facilities (MRF) and mechanical biological treatment. The untreated residential waste reaches an approximate calorific value of approximately 9-11 MJ/kg
  • Substitute fuel < 80 mm: for co-incineration use in cement plant calciners, fluidised bed combustion and power plants for energy recovery. The resulting calorific value of this fraction is approximately 15-18 MJ/kg
  • Substitute fuel < 30 mm (SRF): Ideally suited for the injection furnace in cement plants and substitute fuel power plants. The secondary fuels in the mixture for the co-incineration in cement rotary kilns must have a calorific value of at least 18-22 MJ/kg

Product enquiry


Municipal solid waste (MSW) is characterized in particular by organic components and a high content of particulate matter. With our XR pre-shredders and TR post-shredders we are able to offer a very efficient shredding system for a 2-phase household waste processing.

The economic processing of commercial and industrial waste in just one phase: All thanks to the XR waste shredder!

The XR series cutting unit and hopper shape are designed to handle shredding bulky waste. The cutting unit's high resistance to foreign objects and the ability to easily remove foreign objects via the service hatch make this shredding machine particularly efficient for shredding bulky waste.

With our XR and TR waste shredding machines, we offer reliable systems for processing compressed plastic bales to generate substitute fuel. Depending on the application case, we offer a 1-phase or 2-phase plastic waste processing.

Our machines are impressive at shredding waste wood (e.g. demolition wood and construction timber) most notably thanks to the high-quality output material with reduced fine particulate matter combined with a high throughput rate.

The XR pre-shredder facilitates the economic processing of mixed construction waste. The shredding machine is highly resistant to the mineral components in the waste.

Recommended shredders for alternative fuels


Static waste shredder RDF SRF | XR3000
Power [kW]: 65 - 264
Cutting chamber width [mm]: 1.960/2.960

XR mobil-e

Power [kW]: 113 - 264
Cutting chamber width [mm]: 2.960