A dairy production facility in Ludhiana in northern India was looking to recover its condensate of whey (COW) water for reuse in its production processes.The total organic carbon (TOC) in the condensate water was very high,which posed a challenge.
SUEZ designed a solution that included an RO system to treat the feed condensate at 50m3/h at a recovery of 90%.The solution also included an activated carbon filter (ACF), and UV sterilizer to treat the RO permeate water.
The COW water from the evaporator is supplied at a temperature of 65°C.Hence,as part of pre-treatment, a heat exchanger is provided to cool the COW water to 15°C.The pretreated water is further stored in the conical bottom tank and pumped to the RO feed pump.The RO system is equipped with a high pressure pump, membrane pressure vessel, and the RO membranes. The RO permeate water is further treated through the downstream ACF-UV sterilizer and the chlorine dioxide generator is provided to dose chlorine dioxide to the RO permeate water.
Once the solution was implementation, the TOC level decreased from 5.4 to less than 2 and pH was neutralized.The RO-treated water was reused by the company as process water.
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