The Industry Reduces its Thirst for Water

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Pörner Ingenieurgesellschaft mbH

Italvacuum, Srl

ProMinent GmbH

DECHEMA e.V.

Bayer Technology Services has developed a process for handling effluent which contains organic matter as well as inorganic salts at an Indian pharmaceutical plant. There was no existing infrastructure to use as a basis.

The new stand-alone treatment process has three stages. The organic matter is removed by biological purification. The salt concentration is increased through reverse osmosis to minimize energy consumption in the subsequent evaporation stage.

Treating 15 tons of Waste Water per Day

Veolia Italy has developed a zero liquid discharge system for a global manufacturer of dispersions and adhesives. The system can treat 15 tonnes of wastewater a day. In the first stage, a heat pump vacuum evaporator with forced circulation pre-concentrates the rinsing water.

Gallery

A vacuum evaporator with heat pump and scraper system in the boiling chamber then produces a final concentrate which is mixed with fresh dispersion to obtain a constant density. The distillate is treated for use in washing, reducing the wastewater volume to zero. What used to be a waste product that was sent for disposal is now re-used in the production process.

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