Winery Wastewater Treatment

It can take 100 litres of water to produce one glass of wine - and that hurts profitability through supply costs, effluent surcharges and the loss of valuable growing land to treatment processes. Our industrial screening and treatment technologies can help wineries save money and improve profitability.

Wineries generate significant amounts of wastewater. Most of that wastewater is generated during the crush process, from spillage and water used for sanitation and press cleaning, but additional wastewater is also created when washing harvested grapes prior to crushing. Ongoing operations such as tank washing and Clean in Place (CIP) also create tremendous amounts of wastewater.

Operations that discharge to sewer systems can face significant and ever-growing discharge fees, and the conditions that allow high-quality wine grapes to thrive requires a significant amount of water for irrigation. Water scarcity continues to be a serious issue for all types of vineyards, while water costs continue to increase and can often make or break a winery’s bottom line.

Our beverage processing water management solutions can help you to increase profitability by reducing your wastewater treatment costs, protecting and improving the performance of expensive downstream processes, increasing your by-product recapture, and helping you to reuse your water faster and more efficiently.

Ultrafine rotating belt screening

Finding the most efficient way to solve operational problems is key to any winery’s success. The Hydro MicroScreen™ ultrafine rotating belt screen significantly reduces the load that wineries need to send to wastewater treatment processes by reducing Total Suspended Solids (TSS), Biological Oxygen Demand (BOD), and Chemical Oxygen Demand (COD), which allows winery wastewater treatment systems to operate at peak efficiency by maintaining the capacity of wastewater processing systems and cutting the energy costs of aeration.

After crush, wineries have a tremendous amount of stems, seeds, and pulp that enters wastewater systems. The Hydro MicroScreen™ effectively captures and removes those solids, preventing them from overloading the treatment processes and enabling wineries to recycle the organic material as fertilizer or to create new revenue streams by selling captured by-products on to secondary producers. The compact, dry waste solids that the Hydro MicroScreen™ produces are much more cost effective to handle, dispose of or repurpose. 

The Hydro MicroScreen™ effectively captures solids, preventing them from overloading treatment processes and enabling wineries to recycle the organic material or create new revenue streams.

Recycle and reuse wastewater 

The high sugar content of grapes leads to winery wastewater with incredibly high BOD and COD. Additionally, organic materials such as skins, stems, seeds, and pulp lead to effluent with elevated TSS. Hydro International has tested winery raw wastewater containing COD as high as 13,500 mg/L - and it can be much higher.

To use wastewater for irrigation purposes, a COD of less than 150 mg/L is typically desired. The Hydro MicroScreen™ effectively removes high levels of TSS, BOD and COD to provide irrigation-quality water that can be recycled and reused for growing

Cut energy costs of lagoon treatment

Due to winery wastewater’s extreme levels of BOD and COD most larger wineries treat their own wastewater streams on site. Simple screening systems are used to capture some of the larger particles prior to being sent to primary clarification, though more capital-intensive systems such as aeration ponds/lagoons and aerobic digesters are often needed - and these can be costly and energy-intensive.

Larger lagoon treatment systems also tie up acres of valuable land indefinitely, and when diffusers are smothered by settling solids, the energy cost of aerating these massive lagoons gets a hefty increase.

All vineyards can benefit by reducing the load sent to their lagoon treatment cells, which improves aeration efficiency and reduces energy costs. Aeration diffusers can’t operate effectively when smothered by solids, which forces blowers and compressors to use more energy; the Hydro MicroScreen™ can remove those solids upstream to preserve your capacity and reduce your energycosts. 

Case Studies

California, Napa Valley

While California's irrigation costs continue to rise, so does the cost of treating winery wastewater. A large Napa Valley winery contacted Hydro International to arrange a demonstration project with the Hydro MicroScreen™ system to evaluate its effectiveness on their wastewater stream. In side-by-side tests the system outperformed the conventional existing treatment technologies, providing effective irrigation over an entire season and providing the winery with the opportunity to reduce their treatment lagoon footprint and increase the efficiency of their downstream wastewater processes - saving $740,000 a year in energy costs and $165,000 a year in operational costs. 

Read the case study: Hydro MicroScreen™ helps Napa Valley winery to save $740,000 a year in energy costs

See it in action

Watch our video to see the Hydro MicroScreen™ filtering pomace from winery processing water:

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