Water is a scarce resource. Due to Urbanization and Globalization water usage would increase in the coming years. Industries like power, oil and gas, pharma and chemical generate large volume of wastewater which contains solid waste, organic waste, toxic and non-toxic chemicals which affect the environment. In fact many government and industries have come up with initiatives to reduce water waste by installing ZLD, which in turn will reduce water wastage and help attain a sustainable environment.
The key driver for zero liquid discharge is a growing concern about the impact of such wastewater discharge on the environment. Such concern is resulting in increased regulation and limitation of waste water discharges. Some organizations are also targeting ZLD for their waste because they can sell the solids that are produced or reuse them as a part of their industrial process. For example, salt is the by-product we get at the last stage of ZLD. This salt can be used in textile process.
Evaporation is the most necessary and essential process to zero liquid discharge. 80% of water is recovered by using evaporation technology. MVRE that means “Mechanical Vapour Recompression Evaporator” is an energy recovery evaporator, which compresses a low pressure vapour and produces a low volume of vapour with high pressure and temperature. In MVRE effluent is heated with steam and the vapour produced is compressed and sent to a heat exchanger where it gets condensed and giving pure water at the outlet. Evaporators is an energy intensive process that requires more energy in the form of steam to heat the effluent.
This is why Arvind Envisol came up with a new patented polymeric film technology. Arvind Envisol presents PFET “Polymeric film evaporation technology” that uses polymeric film heat exchangers instead of conventional metal heat exchangers. PFET uses approximately 80% less energy compared to the others, which impacts the operational cost of the evaporators.