Physico-chemical wastewater treatment plant

The over-fertilisation of our waters by the addition of phosphorus compounds has prompted legislators to impose ever stricter limits on the introduction of phosphates, e.g. with the European Water Framework Directive and the Water Budget Law. Likusta has been active as a specialist in the field of water treatment/waste-water treatment and waste-gas treatment for more than 30 years. Likusta is certified as an authorised specialist company according to WHG and VbF. Phosphate elimination by physico-chemical precipitation converts dissolved phosphates into undissolved phosphates and removes them as solids from the waste water. The precipitants used are typically iron salts including iron chloride (FeCl2 or FeCl3), iron chloride sulfate (FeClSO4) or iron (II) sulphate (FeSO4) and polyaluminium chloride (PAC), sodium aluminate or aluminium chloride. The precipitants are themselves water-polluting so measures for the detection of leakage and the prevention of uncontrolled leakage are mandatory. Phosphate elimination can be technically implemented in different ways. Each method has specific advantages and disadvantages Simultaneous precipitation: Improvement of system operation Precipitation with downstream biological stage: Frequently used to relieve the waste-water treatment plants but not always useful as a permanent solution Subsequent precipitation: Very good phosphorus drainage rates but with high precipitant consumption Customised design With over 600 precipitation dosing stations installed, we are your partner for the job.