INTRODUCTION

We all aware that , Effluent treatment in Industries are the major concern to day, not only for the society, but also for the Industries itself &to the monitoring agencies .Achieving “Zero Liquid Discharge” by every industry is the key mantra to achieve a more sustainable , more responsible business, in order to create a sustainable living for the present generation & to the  generations to come.

This article explains how the “Heat Pump Based” Vacuum Evaporation technology, helps  Industries, (Monitoring agencies & the society too…)  to achieve a More Greener, Energy Efficient, Pollution free , Effluent treatment methodology, at a very less OPEX than the present “Steam Based” Evaporators, which are widely used in the present Industrial scenario.

WHAT IS VACUUM EVAPORATION?

Evaporation is the passage of state from the liquid to the vapor form state which, in the presence of vacuum, occurs at a lower temperature than the boiling temperature at atmospheric pressure, thus allowing to benefit from significant energy savings.

Through this technique a non-volatile component is separated from a solution, thus obtaining demineralized water and a final product more concentrated in the other components.

The vacuum evaporation systems are intended for the concentration at low temperature of diluted thermo labile solutions or for the treatment and purification of polluting waste generated in the various stages of processing of industrial companies.

Thanks to vacuum evaporation, in many cases it is possible to recover valuable raw materials from wastewater, reduce disposal costs by concentrating wastewater to be disposed of and installing zero discharge systems, (ZLD).

THE CONVENIENCE OF VACUUM EVAPORATION

The convenience in using the vacuum evaporation technique can be found in various industrial areas.

For example, it is possible to obtain a reduction in disposal costs, depending on the pollutant content, even over 95%, or in the recovery of diluted raw materials, for example the salts in the heat treatment processes of metals, galvanic baths from washings of chromium, nickel, copper or the concentration of pharmaceutical synthesis products, thermolabile food extracts and flavorings.

For the third party waste disposal platforms, the vacuum evaporation allows the extension of the types of treatable wastewater, perhaps in conjunction with the classical purification techniques, biological and physical chemistry, which do not allow the depuration of waste with a high pollutant content.

The production philosophy is aimed at obtaining evaporators that:

  • Have reduced energy consumption
  • Obtain a good quality of the distillate for re-use or drainage into the sewer system
  • Obtain a high degree of concentration
  • They are functioning automatically without the constant supervision of personnel
  • Allow easy maintenance
  • Allow integration into existing systems
  • Are complementary to further processes (eg concentrated by membrane processes)
  • Allow the creation of zero or open circuit systems
  • Have excellent corrosion resistance through the use of suitable materials
  • Work with a low evaporation temperature during distillation

ADVANTAGES

Heat Pump Mechanical Vacuum Evaporators do have lots of advantages technically & commercially over conventional Steam based Mechanical Evaporators

S.No. Mechanical Heat Pump Based Vacuum Evaporators Mechanical Steam Based Evaporators
1. No Boiler, No Steam, No Head Ache Requires Bulky Boilers, & Steam
2. No Secondary Air Pollution Boilers Generate Air Pollution
3. No depletion Of fossil Fuels Boilers do require fossil Fuel
4. Do not require any additional Air Pollution Monitoring Measures Require additional Air Pollution Monitoring Measures by Government
5. No shortage of Energy Resources Coal, Firewood, Gas, Diesel shortages exist
6. Very Compact in Size Very Bulky& Require large land space
7. Operating Expenses 20-50 P/Litre
of Effluent to be treated
Operating Expenses 90p-Rs.2.50
per Litre of Effluent to be treated