As lowering our overall environmental impact becomes increasingly important, there is growing pressure on industry to reduce the amount of process wastewater that’s discharged to sewers. Having to treat higher volumes of this wastewater can, however, be expensive.
Most industries have already reduced their water consumption to a minimum. However, even with the implementation of efficient clean-in-place (CIP) systems and the ability to recycle detergents a number of times, large volumes of caustic wastewater are often generated.
With repeated use, cleaning solutions — which mainly consist of a 2–4 percent sodium hydroxide solution — become loaded with impurities, such as proteins, sugars and colorants, and must subsequently be changed. However, using a nanofiltration (NF) plant from GEA, these solutions can be cleaned and regenerated for continued use, thereby saving money and avoiding disposal issues.
The regeneration of these CIP solutions is achieved using membrane filtration at the normal operating temperature of the fluid (up to 70 °C). The contaminated CIP solution is fed into the main storage tank via a bypass system and subjected to ultrafiltration (UF). This removes suspended colloidal impurities.
Often, CIP solutions can be directly treated in a nanofiltration (NF) system to remove color and low-molecular weight impurities. This concentrates the impurities in the retentate, thereby allowing the purified caustic solution permeate to pass through at the same concentration and temperature as the feed.
GEA custom designs membrane filtration systems that best utilize the technologies of microfiltration, ultrafiltration, nanofiltration, or reverse osmosis for each customer's specific application.
Condensate from evaporation plants is used as boiler feed water, process, cooling, and rinsing water or is directly discharged into a drainage ditch.
For this purpose, the condensate must be purified. Impurities in the condensate can be removed by membrane filtration, in the particular case by reverse osmosis, and high condensate qualities can ...
GEA cross-flow filtration with robust ceramic membranes are used for the effective recovery of beer from tank bottoms. Modular plants are supplied on compact skids in three standard sizes with processing capacities of approximately 250 hl, 500 hl and 1000 hl per day depending on the dry solids content of the product.
Supporting small to large feed rates, and configurable for both batch and continuous processes, the dedicated AromaPlus system is built on our reverse osmosis (RO) membrane filtration technology.
GEA is one of the world’s largest systems suppliers for the food, beverage and pharmaceutical sectors. Our portfolio includes machinery and plants as well as advanced process technology, components and comprehensive services. Used across diverse industries, they enhance the sustainability and efficiency of production processes globally.
GEA is listed in the German MDAX and the STOXX® Europe 600 Index and is also among the companies comprising the DAX 50 ESG and MSCI Global Sustainability Indices.
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