Food & Beverage Processing

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A Global Leader in Custom Food Processing Solutions

RWL Water has more than 30 years of experience in the custom design of treatment plants using ion-exchange resins and absorbent resins for food processing solutions. Our cost-effective and innovative solutions are ideal for wine, fruit juices, whey demineralization, and cane sugar decolorizing. RWL Water is a global leader in the design and implementation of 4SMB chromatography plants for the purification of fruit juices and the production of organic fructose without the use of chemical reagents

Demineralization of Fruit Juices

Our demineralization processes offer superior performance and several advantages, including reduced dilution of treated juices and a high-quality end product, with very low reagent consumption.

Recovery of Organic Acids and Natural Fruit Colors

RWL Water recovers organic acids and natural colors — including malic acid, tartaric acid, and enocyanin — from fruit juices. We eliminate almost all demineralization costs, increase overall plant efficiency, reduce energy consumption, and lower the organic load of wastewater. RWL Water is able to reduce plant size, thereby reducing energy consumption and the amount of waste-activated sludge produced.

Tartaric Stabilization

RWL Water performs tartaric stabilization of wine through ionic exchange with resins. This process reduces initial investment and costs less to operate than cold stabilization, the standard process. We have designed and built installations providing the same benefits as our demineralization lines, namely: reduced dilution of the treated juice, production of high-quality products despite low consumption of regenerants, and maximum exploitation of the resin-exchange capacity. We pay particular attention to optimizing the sensory properties of the end product, carefully choosing suitable materials and resins.


RWL Water builds plants for polyphenol content reduction and for the complete decolorizing of grape must, sugar cane, and fruit juices. This results in a perfect control of juice color, as well as the recovery of natural colorant (enocyanin) without the use of alcohol. This results in a reduction of the organic load (which is not readily biodegradable) in wastewater treatment plants.


The debittering process removes the bitter taste from fruit juices such as orange, lemon, and pomegranate. The resins used for recovery of the natural colorants are used to remove the bitter taste, too. There are many applications of ionic exchange and adsorbent resins, and the technology is continually developing. We work with the most trusted resin production and distribution companies — including Resindion-Mitsubishi, Bayer, and Purolite — to solve the latest problems referred by our customers.

4SMB Chromatography

4SMB (Four Simulated Moving Bed) chromatography, a technique originally used for the purification of molasses in sugar refineries, uses water only for separating sugars from salts. RWL Water applies this technology, on a smaller scale, to the demineralization of fruit concentrates, and to the whey and sugar industries. The technique is based on a physical process and therefore does not use chemical reagents such as acids and soda because the resins used do not need to be regenerated. Another advantage of SMB chromatography is the reduction of the saline and contaminant load in wastewater.

Chromatographic Separations

4SMB chromatography can be used to separate sugars like glucose, sucrose, and fructose from demineralized concentrated must (DCM), or from concentrated apple juices. Under recent international regulations in favor of “Green Chemistry,” SMB technology will be the only technique permitted to obtain organic certification in fruit juices and sugars.

Food Treatment: Pilot Plants

As with all new technologies, feasibility, dependability, and cost-effectiveness must be verified. Therefore, RWL Water offers pilot plants to customers. In terms of equipment and processes, these are equivalent to industrial plants. This lets the customer see the technological advantages and potential limitations of the proposed process, and lets RWL optimize the plant design according to actual customer requirements as verified in the field.

Food & Beverage Processing Case Study: Kineta Fruit Concentrates

A premium grape juice concentrate producer and marketer based in Argentina needed a solution for the decolorization and demineralization of grape must at its facility in Mendoza. RWL Water successfully decolorized the must from both rose and white grapes using ion exchange resin technology, achieving a density of between 20 and 22 Brix, with a maximum density of 24 Brix. The customer was ultimately able to create high-quality juice concentrates.

What food and beverage processing challenges can we help solve for you? Contact us for more information about our food and beverage processing solutions or to request a quote.