Caloris RO Condensate Polisher Case Study

Installation Minimizes Environmental Footprint, Conserves Water

A new milk powder production facility was built in a water stressed region with the goal to minimize their environmental footprint as well as conserve water resources.

The customer approached Caloris to design and install necessary treatment equipment to recover cow water (vapor condensate) discharging from the evaporation process systems and process it to a quality suitable as Category I, acceptable for use in potable water applications.

Caloris’ technical solution consists of two Reverse Osmosis (RO) Polisher systems capable of processing cow water generated from the evaporation process systems at a permeate rate of 100 gallons per minute for up to 20 continuous hours each day. Because the facility relies entirely on the polished, Category I water to support its operation, they elected to go with completely redundant RO systems. This provides an adequate safety factor and allows for maintenance, etc. on the systems.

Prior to entering the RO systems, the energy from the hot condensate is recovered by pre-heating the whole milk prior to cream separation. After this step, the cool cow condensate enters the RO system. The RO discharge concentrate (at 90% recovery) is safely diverted to the drain, while the RO permeate is disinfected by the inline PMO (Pasteurized Milk Ordinance) UV device and then sent to the potable permeate silos. Automated CIP (inclusive of chemical dosing, heating and cooling) is independently initiated for each RO system at the conclusion of that RO system’s 20 hour production run. Both RO systems are also capable of using well water as a feed source.

The two RO systems were delivered as a single, pre-assembled skid including pre-piped RO element housings, pumps and heat exchangers. This helped reduce the cost of the installation as well as the time to complete the installation.

The project from design, installation to operation took 16 weeks to complete and produces more than 144,000 gallons of potable water for the facility every day.

CALORIS ENGINEERING LLC offers a variety of product designs that can be configured to accommodate the complex processing needs for numerous product streams and wastewater applications. Contact our sales and technical specialists at 410-822-6900 or email to discuss your specific needs. Caloris has several small pilot evaporators that can be used to evaluate opportunities.


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About Caloris

Caloris transforms process systems design for the better with unexpected, future-focused solutions that solve real operational problems. We engineer efficient, dependable and productive solutions that also improve environmental sustainability where practical. Designed with the end user in mind to drive plant productivity. Caloris offers evaporation, membrane filtration and spray drying process systems for food and dairy industries, as well as for water reuse and wastewater treatment applications. Both Caloris’ custom and pre-engineered packaged systems are designed to meet our customers’ specific concentration/purification needs utilizing the most cost effective and energy efficient technologies available. Whether concentrating dairy, food or juice products at a high-volume production facility, or processing industrial wastewaters to reduce transportation and treatment costs and recover re-usable water, Caloris provides a range of options and technologies.