Comminution of organic material



Johannes A. Müller


Institute of Mechanical Process Engineering and Institute of Sanitary and Environmental Engineering, Post Box 3329,Technical University of Braunschweig, D-38023 Braunschweig, Germany, Email:




The comminution of materials of bioorganic origin such as organic solids, biological agglomerates or microorganisms is described in this work. The intend of this disintegration process is to release products, to improve the product quality or to enhance biological degradation processes.

Special analytical techniques based on biochemical parameters are required in order to characterise the result of the comminution of organic materials. These techniques supplement techniques that are known from the comminution of brittle inorganic materials.

The defined stressing of single particles can be used to characterise the comminution properties of solid bioorganic materials.

The disintegration of microorganisms has been investigated in the fields of biotechnological product release and biodegradability of wastewater sludges. It is possible to optimize the operational parameters of stirred ball mills based on stress intensity and stress number in order to reduce the energy input and to improve the product release.

Full Paper in PDF (548 KB)

Source: J. A. Müller (2003).Comminution of Organic Material, Chem. Eng. Technol., 26(2003)2, 207-217