Wytewater Technologies Pvt Ltd.
    Electroplating operations and metal finishing lines use a combination of metal salts in different concentrations to achieve the desired finish or metal coating on the job. The jobs are further rinsed and rinse water with the carry over metals is generated as wastewater.
    The wast rinse water after removal of the metal salts can be purified and reused in the rinse water tanks.
    In metal finishing operations, where the plating/finishing operations involves the use of a single metal complex, complete recovery is possible.
    The concentrated metal complex generated from the process can be used back in the metal plating bath or the chemical bath, whereas the treated water can be reused as rinse water in the rinsing baths.

    Water Sources from different places have a variety of impurities in different concentrations. The impurities are a combination of various cations and anions – which are inorganic in nature and contribute to the “total dissolved solids” in water. Machine coolants are a blend of 4-5% mineral oil in this water.
    On continuous recycling of the coolant, these salts get concentrated due to evaporation of water alone, when the cutting fluid comes in contact with the hot machining surface. Such build up of dissolved solid will have two problems,
            1. Higher salt concentrations have been noticed to increase Pseudomonas growth.
            2. Large concentrations of hardness cations and other dissolved solids can lead to instability of the
               emulsion and precipitation of insoluble material on the machining surface.
    An important aspect of coolant recovery is the removal of salts from water in the emulsion. This can be achieved by membrane separation after suitable pre-treatment by photochemical oxidation to ensure bacteria free coolant emulsion as feed to the membrane process.

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