basic undrstanding of brewery waste water & review of the 5 stages

Processed Wastewater:
- Includes all drains in the brewery, excluding sanitary drains.
- Piped to a sump or pit from which the effluent leaves the property.
- Areas like food preparation or tasting rooms contribute to this type of wastewater.
- Municipalities often have sampling points outside the brewery for testing.
Sanitary Wastewater:
- Originates from restrooms and human washing stations where coliform bacteria may be present.
- Ideally kept separate from processed wastewater.
Stormwater:
- Collected during precipitation from parking lots, process areas, and roofs.
- Often connected to the processed sewer system in older municipalities; current practices recommend separation to prevent overload in municipal treatment plants.

Wastewater generation is dependent on variables such as water usage.
Suggested method: Perform a mass balance of incoming water vs. outgoing wastewater.
- High evaporation loss: 10-15%.
- Water in beer and residuals: Approximately 80% water by weight.

The Beverage Industry Environmental Roundtable (BIER) conducts benchmarks of water use across breweries.
Average water use: 3.8 liters of water for every liter of beer produced.
- Equivalent to 3.8 barrels of water for each barrel of beer.
Smaller packaging (e.g., 12 oz bottles) generally requires more water than larger packages.
Larger facilities often have better water efficiency due to economies of scale.

For every liter of water used, expect about 80% to be discharged as wastewater, indicating a wastewater-to-water ratio of approximately 0.8.
Measure variations in wastewater flow due to solids in effluent which may skew accuracy.

Biochemical Oxygen Demand (BOD): Measures the amount of oxygen required by aerobic organisms to decompose organic material.
- High BOD indicates a high contamination level.
- A standard BOD test (BOD5) is conducted over five days.
Total Suspended Solids (TSS): Measures the solid particulates in wastewater.
pH: Typically managed using neutralization systems to meet municipal regulations.
Nitrogen Content: Increasingly regulated due to potential surcharges from municipal treatment facilities.

Chemical Oxygen Demand (COD): Faster alternative to BOD testing; results are available within hours.
BOD/COD ratio: Generally between 0.5 to 0.7 for brewery wastewater.

Create both a water mass balance and a wastewater loading mass balance for effective management.
Key areas to investigate for high BOD and TSS include rinse waters and fermentation processes.
Flow measurement can be performed using mobile flow meters or simple bucket-stopwatch methods.
Assess impacts on wastewater profile based on specific brewing processes.

Focus sampling efforts on drains with suspected high levels of contamination.
Collecting flow-weighted composite data is more accurate but costly; grab samples can suffice for initial assessments.
Maintain an inventory of drainage sources and their respective flow and concentration measurements to better manage wastewater.

True or False: Brewery wastewater can contain coliform bacteria.
- Answer: True
True or False: The average water use in breweries is approximately 3.8 liters for each liter of beer produced.
- Answer: True
True or False: BOD testing is a faster method than COD testing.
- Answer: False
True or False: Stormwater should be collected separately to prevent overload in treatment plants.
- Answer: True
True or False: For every liter of water used, approximately 80% should be expected to be discharged as wastewater.
- Answer: True