Wastewater Treatment Systems

Importance of Wastewater Treatment Systems

MVR Evaporator with Polymeric Heat Exchangers

People in business would not miss the obvious when it comes to the question of why wastewater treatment systems are needed. Coping with stringent environmental regulations by the government and sustaining plant profitability becomes a difficult balancing act. To choose an effective wastewater treatment systems, one needs to understand the process at the grass root levels. In the absence of treatment or due to insufficient treatment of hazardous wastewater, the water bodies and the ground water are increasingly getting contaminated over the years. Therefore, governments all over the world are insisting on zero discharge to stem the pollution fallout.

Industrial companies face additional challenges. Process water may be scarce or of low quality. The wastewater stream may contain solids that need to be removed. Issues like these make the recovery and re-use of wastewater inevitable in countries where there is a chronic water shortage and rampant pollution.

Why Evaporation ?

Evaporation is the only treatment method that removes impurities from coarse particle size down to the ionic size. The evaporator is an essential equipment in the sequence of wastewater treatment, without which the problem of dissolved solids cannot be tackled at all.

Evaporation is the best option when:
• The effluent contains inorganic substances (salts, metals), both inorganic and organic substances, or other non-volatile toxic substances
• You can re-use the treated water in your process
• You are facing strict discharge limits, and/or
• You want to minimise the concentrate that contains the solids.
For instance, evaporation removes more salts and COD (Chemical Oxygen Demand) from paper industry effluent than any other single treatment method. All non-volatile compounds can be completely removed resulting in recovery of very pure distillate and reduction in contaminant volume.