EnviroChemie carried out laboratory research to develop a concept that would reduce costs and the volume of sludge for disposal. The result was water treatment chemicals which were not only more efficient and specifically matched to the water but which could also replace the water chemical products currently being used to treat the wastewater. The coagulant previously used was therefore replaced with ECSO 8635, a product specially developed by EnviroChemie, which covers a wider range in the event of fluctuations in the wastewater.
To set the pH value, the classic caustic soda was replaced by an ECSO 8620 neutraliser. This has an additional coagulant effect which means both neutralisers and coagulants can be reduced. At the same time, there is a positive side effect of a reduction in the quantity of sludge produced.
In addition to this, the flocculating agent used for wastewater treatment was also adjusted. This allowed the dry matter content in the flotate sludge to be increased and the disposal costs to therefore be substantially reduced.
The process devised from the laboratory tests was checked in an on-site operating test and the wastewater quality analysed. After changing the products and subsequent process review, the dosage quantities could be reduced further