aquen aqua-engineering GmbH products

So far, there has been no method available for the reliable assessment of flocculated particle systems. The monitoring and control of dewatering processes through assessment of the flocs was thus not feasible. On the other hand, the quality of the dewatering properties in a flocculated system can only be evaluated using the floc image prior to dewatering.

The standard procedure for preparing sewage sludge for dewatering is a chemical conditioning by polymers. The task of an optimized conditioning is to optimize the flock structure in interconnection with highly variable sludge and process parameters. Todays technique doesn’t reach this aim. Different dewatering units demand for a specific flocculation process. Thus, the dewatering results are as good as the conditioning step.

The principal of best practice has proven itself many times over. Details of how and why we have consistently implemented the eleven most important requirements for a polymer mixer can be found in our white paper “11 tips for intergrating a polymer mixer for flocculation`, which can be downloaded here. By using our mixers, you can maintain firm control of the mixing process. We have concentrated all of our years of test results and targeted improvements into our range of inline mixers. Take advantage of our mixing expertise using many different sludges and polymers under a wide range of operating conditions.

Ground apertures of several hundred metres are made in geothermal applications or when drilling wells or geothermal probes. The accumulated groundwater and service water raises to the surface under high pressure (approx. 5 to 7 m3/h per borehole) and must be partially depressurised and disposed of. Traditional disposal methods use several sedimentation vessels installed in sequence, with some systems using up to six vessels in a row. The space required on site measures approximately 100 m². Other requirements: Gradients or access for pumps and tankers. The water run-off is disposed of into the sewage system or local environment, where applicable. The remaining sediment in the vessels is disposed of by third-party companies. Usually, the sediment still contains a high volume of water. This then becomes apparent in the disposal quantities and costs. The dry solid volume is only around 5% when using this traditional sedimentation method.

The dewaterability of a flocculated system can only be evaluated qualitatively on the basis of the floc image before dewatering. However, a system for the reliable evaluation of flocculated particle systems was not available until now. For this reason, we have developed the innovation product FlocSens.

The dewatering of sewage sludge is only as good as its conditioning. The demands on the conditioning technology are correspondingly high. The goal is the formation of optimally dewaterable flocs with permanently changing sludge and process parameters. For optimum dewatering results, each dewatering unit requires a whole specific flocculation.

The quality of the dewatering performance depends to a large extent on the floc quality. This is influenced by various factors: among others, by the type of sludge, the quantity, the type of mixing in and the quality of the flocculant.

The dewaterability of a flocculated system can only be evaluated qualitatively on the basis of the floc image before dewatering. However, a system for the reliable evaluation of flocculated particle systems was not available until now. For this reason, we have developed the innovation product FlocSens.