Trace Element Analysis of Water and Sediment Before/After Passing a Waste Water Treatment Plant

A system for waste water cleaning using activated red mud is described in this paper. This system was originally developed for heavy metals and turbidity removal from the waste water generated by pressure washing of the boats coated with antifouling paints. The major parts of the system are described. After the treatment clear water can be discharged directly into the sea and the remaining waste mud with high amount of Cu, Zn, and Pb is filtered through the filter bag and stored. It is possible to carry out five cycles with the same dose of coagulant. Untreated water and sediment analysis was done and concentrations of heavy metals in the treated water are lower than the allowed concentrations prescribed for the technological waste water that could be discharged into the environment.