Drum composting

Drum composting



Quick Overview

With drum composting treating diff erent types of organic waste in a continuous, highly automated process without supervision. During the short processing period (only 7–14 days) of this purely natural process, the amount of organic waste mixture is decreased by 30–50%. There is no need for chemicals, additives or additional energy, and both the process and end product fulfi l, for instance, all official EU requirements regarding emissions and hygiene.

When the biowaste reaches the plant, support material is added to it in order to add carbon to the process and ensure the optimal structure of the mixture in terms of air and humidity. Such support material can be peat, woodchips, straw or even cardboard, for example. The mixing of waste and support material is an automated process. In the next phase, the biowaste mixture is fed into an aerated composting drum, where the temperature rises to 50-70°C as a result of microbial activity. Air is constantly blown into the drum, and its amount is regulated by monitoring exhaust gases and the process temperature. In this way, optimal conditions can be maintained throughout the entire process.

The high quality end product is transferred automatically into the storage. The heat generated in the continuous process can be recovered and used for heating, drying or producing hot water, for example. The compost is clean, odour-free and hygienic, and during storage it matures and cools down, becoming fluffy. It is suitable as a high-value soil conditioner, among other applications.


• all farming biowaste (piggery, cow stables, poultry farm, horse stables, fur by-products)

• various kinds of garden waste

• special collected biowaste and biowaste from central kitchens

• sludge from waste water treatment plants

• biowaste from food industry

• biowaste (cleansing waste and fi sh remains) from fi sh industry

• even some wastes from the oil/chemical industry and polluted soil


• can be stored and sold

• nutrients are bound very well and are in a usable form for plants

• pH ≈ 7

• does not attract vermin (birds, rats, etc.)

• free of pathogens (salmonella, listeria, etc.) immediately after the drum

• easy to store, no leakages or odour, no need to turn

• no need for big composting fi elds nor open storages

• homogeneous

• output is 30–50% smaller than input


More information about SOMBIO drum composting please find in the Brochure.