Completing the cycle:
turning wastewater back to water.
Sources of Wastewater
•Crush Pad Operations
Reducing Wastewater Strength
BOD (Biological oxygen Demand)
BOD in wastewater comes primarily from juice, grape solids, wine, lees and cleaning chemicals. Minimizing where these substances enter into wastewater can substantially reduce the strength of the composite wastewater generated by a facility.
TSS (Total Suspended Solids)
TSS in wastewater comes primarily from grape solids, juice, lees, DE and bentonite. Screening wastewater with coarse filters (rotary screens, bag filters, wedgewire screens, and self cleaning water filters) can significantly reduce the level of TSS entering a wastwater treatment system. In general it is good to place the solids filtration as close to the source of contamination as possible.
Nutrients in wastewater can come from various substances. One example of nutrient loading is the cleaner TSP (trisodium phosphate). This is a highly effective cleaner, however phosphates in the cleaner can trigger algae blooms. These can be an issue both in pond systems and if phosphates enters a lake or steam. In a natural waterway an algae bloom can deplete oxygen in the water and lead to fish and aquatic plant die-offs.
Salts from water softeners and sodium based cleaners are not removed in most wastewater treatment processes and can create complications with reuse applications. While reclaimed water with elevated salt content can be used for vineyard irrigation, there is a risk of negatively impacting the vineyard soil through long term application. This can be mitigated but is important to monitor and correct if necessary.
Using potassium based cleaners in place of sodium based cleaners can significantly reduce wastewater salt loading.
Korbel Winery Process Water Ponds Efficiency Measures - Fine bubble aeration treatment