The impact of polymer induced flocculation to the dewatering / filtration results

C. Schröder, aquen aqua-engineering GmbH, Germany

In the waste water treatment technology polymer initiated thickening and dewatering steps are state-of-the-art. Lately, other industrial sectors are more and more interested in an application in order to separate specific ingredients, e.g. in the pulp and paper industry.

Traditionally, the focus of interest and innovation was – and still is - on the separation apparatus itself, not on the precedent generation of the optimized floc structure for this apparatus.

Common one-step or static mixers could not control the floc development in a satisfying way, thus, the reproducable forming of a targeted floc structure is hardly possible. This suboptimal floc structure is widely compensated by polymer overdosages, which causes high polymer costs.

The efficiency of any separation process, e.g. filtration, is influenced by the separation unit itself as well as by the conditioning of the media (flocs). Conditioning means the preparation of the media by e.g. chemicals to enhance the separation characteristics. Organic flocculation agents are often used for the conditioning of waste water or sewage sludge. The addition of these polymers cause the flocculation of the colloids in the media. The resulting floc structures highly depend on the way of insertion of the polymer into the sludge and the following development of the floc.

The improvement of the mechanical sludge dewatering is investigated with the aid of a new flocculation analyzer...

Session: L13 - Filtration enhancement by Coagulation/Flocculation
Day: 12 October 2016
Time: 16:45 - 18:00 h

Learn more at FILTECH 2018 - Register Now!