Green waste
As lopping be freshly cut, with little or no woody designated plant remains as often as waste when cutting or when cutting in the garden , landscaping , Roadside and forest maintenance incurred. The span of the plant ranges from grasses and herbs to green bushes to green wood such as branches with a high proportion of leaves ( leaves ) and juice leading bark (z. B. wood residues or thinning waste ).
Recovery
Recycling
As a raw material for the wood processing industry ( paper production , chipboard production, etc.), green waste is poorly suited due to its low content of lignin and cellulose fibers .
Some plant species that are not lignified or lignified at all can be used as green fodder for animal husbandry, sometimes after processing through drying or as silage .
The most common use of green waste is as mulch (especially when it is more lignified) or as a soil improver / fertilizer , the latter mostly for less lignified plants after composting . If the location allows this, the green cuttings are often left lying where they come from or are crushed and then scattered again. The amounts that can be used in this way are limited.
In urban areas, green waste is mostly collected centrally (via the organic waste bin or similar) and processed in composting plants.
Energy recovery
The more lignified and drier parts of the green cuttings can be shredded into wood chips or shredded material and easily used in firing systems in biomass heating or power plants . Further processing into wood pellets or residual value pellets is also possible. The energy wood specifically cultivated in short rotation plantations , for example, contains a relatively high proportion of greenery.
Green waste that is not very lignified is unsuitable as a fuel because it has a very high level of moisture and therefore a low specific calorific value and because of the high ash content with a low softening temperature it tends to form slag in the furnace. Transport, processing and storage are also difficult, so that more and more malfunctions occur in the combustion system's fuel systems. However, admixture to a limited extent is possible.
For energy recovery, especially from green waste that is not very lignified, it can be used as a substrate in biogas plants as an alternative to incineration .