Preparation of Soil, Sewage, Sludge and Sediment Samples in the Wastewater Treatment Laboratory

Preparation of Soil, Sewage, Sludge and Sediment Samples in the Wastewater Treatment Laboratory

Retsch offer the widest range of ball mills worldwide.

The preparation of a mixture of organic and inorganic samples holds some difficulties: whereas sand, clay and stones can usually be ground to homogeneous samples with suitable laboratory mills, the high energy input can cause samples with organic components such as fat or starch to cake.

Waste water treatment laboratories have to deal with this problem every day. The sediments of household and industry waste water not only contain sand, clay or leaves but anything that people nowadays dispose of through the sewer system: cellulose, hair and especially food residues.

Preparation of soil, sewage, sludge and sediment samples

With just one laboratory grinder – the RETSCH planetary ball mill PM 400 – representative samples for subsequent analysis, regardless of type and origin of the sample can be prepared! The only exception is soil samples which are subjected to primary size reduction in a bench top jaw crusher (Retsch BB 50).

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