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Nature’s way to recycling for the environment

Green waste processing with ALLRECO: Perfect results at each processing step

Composting

The aim of composting is the transformation of biogenic waste such as green waste or biowaste to a high-quality soil conditioner for agriculture, gardening and soil production. A renewable fuel for energy recovery is one of the by-products,

Nowadays, the legal requirements as to the quality of the products are increasing and therefore the demands on composting. ALLRECO offers the corresponding custom-made solutions without reducing your flexibility for changing tasks of the future.

The machine combinations used for compost processing can vary widely. Basically two applications can be distinguished: the green material composting and the biowaste composting. Due to the complexity of the processing, please refer to our ALLRECO brochure “Biowaste” for further information on biowaste composting. The waste used for green material composting is generated in the landscape management, gardening and agriculture.

Depending on the application the material is shredded by a CERON series pre-shredder and/or an AK series fine shredder. The shredding has a decisive impact on the subsequent composting in relation to the fraying degree, the air spaces, the bulking material and therefore the processing time until the required rotting degree.

For thermal recovery of the output fraction, the material can be classified with several grain sizes after the shredding. It is the task of the screening not only to fractionate the grain size, but also to remove contaminants. The screened medium fraction can be used for thermal recovery. The fine fraction is taken to the aerobic transformation of the rotting process. The oversize is returned and transported to the shredder again. 

Depending on the recycling situation of the material flows and the properties of the input material, the shredded product can also be dropped to form a windrow for an aerobic transformation before the screening process. The material is turned several times by the ALLRECO DU windrow turner. It ist he aim of windrow turning to control the water content, the aeration and thus the rotting process. The oversize from the screen can be used for thermal recovery or processed further. For further information, please refer to our ALLRECO brochure “Compost oversize”. The screened fraction can be used as a high-quality and natural humus fertilizer.

If the screened fraction is contaminated, a fine compost processing can be integrated in the process. It is composed of an aspiration unit with accelerator belt. Contaminants such as film, plastic or paper residues are aspirated from the fine compost and can be used for thermal recovery.

  • By composting biogenic waste such as green waste or biowaste, a high-quality natural humus fertilizer and a renewable fuel for energetic use are produced
  • There are two different applications of composting: Green material composting and biowaste composting
  • Depending on the material properties and on the recycling situation, the treatment process can be adjusted to our customers‘ requirements.

Benefits of ALLRECO machines in the compost processing: 

  • Custom-made and flexible complete solutions
  • Maximum material disintegration
  • Optimum rotting control
  • Perfect final product without contaminants
  • Including ALLRECO service and quality

Contact us now for your optimum recycling solution!

Process description of green waste composting

The aim of composting is to turn biogenic waste such as green or organic household waste into a high-quality soil conditioner for agricultural, horticultural and soil generation purposes. A homogeneous fuel which can be burned for energy is produced as a by-product. Today, new legal requirements on the quality of the products produced are placing an increasing demand on composting technology. Doppstadt offers you customised solutions to meet this demand without taking away the flexibility you need to deal with whatever jobs the future brings. The materials used for composting vary widely. Here we distinguish between two streams: green waste composting and organic household waste composting. Green waste composting makes use of all waste generated by landscape conservation, horticulture and agriculture. This is shredded.

This first step already has a massive influence on the rest of the composting process in terms of the degree of fraying, the percentage of air voids, the structural material and therefore of the processing time needed to achieve the necessary degree of decomposition. After shredding the raw material, the shredded fraction is placed in windrows which are turned several times. The aim of turning the windrows is to control the water content, the air circulation and thereby the rotting process. After the source material has been aerobically converted to a homogenised compost, it can be screened. This screening process is not just for separating the material according to particle size, it also has the important task of eliminating non-biological contaminants. Various separation processes eliminate plastics and synthetic materials just as effectively as iron parts and stones. The aim is to produce a high-quality and natural humic fertiliser.

0-25 MM

Compost for agriculture

40mm

Pre-compost

The process at a glance