Recovery of organic matter from dairy effluents, Part 1: Planning and building of a pilot-plant.

To study the recovery of protein constituents of dairy effluents a pilot pl ant (flow rate: 300 l/h) was built, allowing a controlled dosage of two sep arate precipitants and registration of various parameters. The resulting sl ugde was separated in a vessel with inclined baffle plates and was concentr ated afterwards using a centrifuge. In the first experiments diluted skim m ilk was used as a model waste water. The precipitation was achieved using a cationic polymer in combination with a mineral dispersion. By this process , the protein content could be lowered to about 4 % of the protein content of the waste water. The chemical oxygen demand was about 40 % of the initia l value.