Winery Wastewater Treatment Solutions

Typical wineries generate 2-8 gallons of wastewater for each gallon of wine produced - and that wastewater hurts profitability through water costs, effluent surcharges, and the loss of valuable land to treatment processes. Hydro International wastewater treatment reduces winery operating costs. 

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, though additional wastewater is also created when washing harvested grapes prior to crushing. Ongoing operations such as tank-washing and Clean in Place (CIP) create tremendous amounts of wastewater, collectively referred to as total plant effluent.

Water & Wastewater’s Critical Impact on Winery Profitability

Operations that discharge to sewer systems can face significant and ever-growing surcharge fees. The arid conditions that allow high quality grapes to thrive means a significant amount of water is required to irrigate exceptional wine grapes. Water scarcity continues to be a serious issue for all types of vineyards. Water costs continue to increase and can often make or break a winery’s bottom line. Hydro International’s liquid / solids separation solutions can help you recycle your process water and reduce your treatment costs.

The Nature of Winery Wastewater

The high sugar content of grapes leads to winery wastewater with incredibly high Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD). Additionally, materials such as skins, stems, seeds, and pulp lead to effluent with elevated Total Suspended Solids (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.

Lagoon Treatment is Energy Intensive

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

Larger lagoon treatment systems tie up acres of valuable land indefinitely. When diffusers are smothered by settling solids, energy costs to aerate 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.

Hydro MicroScreen™ Can Help!

Finding the most efficient way to solve operational problems is key to any winery’s success. The Hydro MicroScreen™ system significantly reduces the load that wineries need to send to wastewater treatment processes by reducing TSS, BOD, and TS which allows winery wastewater treatment systems to operate at peak efficiency. This allows more effective and efficient winery wastewater processing and reduces the energy costs of aeration. After crush, wineries have a tremendous amount of stems, seeds, and pulp that enters wastewater systems, we can help fix that!

Most winery wastewater treatment systems targeting BOD and COD can efficiently treat liquids, but they are not so good at dealing with solids. Removing those solids before it enters wastewater treatment can provide new revenue streams by selling it to secondary producers or it can be used for composting into fertilizer. Compact, dry waste solids can be much more cost-effectively disposed of or repurposed than treating it in an expensive wastewater treatment system.

• Case Study: Hydro MicroScreen™ Napa Valley Winery Solution

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