Milk and Spillage
Milk that seems pure and white has the potential to destroy the water ecosystem. Milk gets dumped into water streams like rivers and ponds regularly due to devotional reasons.
Dumping of milk is also done in accidents of vehicles carrying milk and from milk processing industries.
Milk, a staple in many diets worldwide, has a hidden dark side when it comes to its impact on water bodies. Milk solids are primarily composed of fats, proteins, and carbohydrates.
The disposal of milk into streams, rivers, or ponds can have severe consequences for aquatic ecosystems.
In this article, we delve into the often-overlooked dangers posed by milk pollution and its detrimental effects on water quality and aquatic life.
The Biological Oxygen Demand (BOD) Crisis
Milk’s high Biological Oxygen Demand (BOD) is a major concern. The biological oxygen demand simply called BOD is the amount of oxygen needed to digest the organic matter by bacteria.
The bacteria consume the dissolved oxygen in water in this process of digestion. Generally, 90% of digestion is done in 5 days so BOD5 is an important indicator for pollution.
When milk is introduced into water bodies, it depletes the dissolved oxygen crucial for aquatic life. This results in a loss of dissolved oxygen in water. Fishes need a certain minimum of dissolved oxygen in water to survive.
Anaerobic digestion will occur in this depleted dissolved oxygen case. This generates foul odors, turning the water septic and disrupting the delicate balance of the ecosystem.
Comparing Milk to Sewage
The alarming truth is revealed when comparing the BOD of milk to that of household sewage.
Whole milk has a biological oxygen demand (BOD) of nearly 100,000 mg/liter (Source). Sewage has a BOD of nearly 300 mg/liter. This means that Milk surpasses sewage by a staggering 50 times in polluting potential. Household sewage has a BOD of nearly 300 mg/liter. However, these values can vary.
In another perspective, Whole Milk takes up 50 times more dissolved oxygen from water than household sewage does. This reveals the severity of milk pollution and its high impact on water quality.
Conversion of MilK in Body
Drinking milk and milk products ultimately gets converted to poop and sewage is less harmful than dumping whole milk.
This is due to the reason that the human body consumes the fats and proteins in milk to the energy that is required to move and the carbon dioxide that we breathe out.
This means our bodies (although inefficiently) convert the milk BOD to carbon dioxide gas which gets released into the atmosphere. If this milk was instead released into water then the digestion has been done by bacteria thus taking up dissolved oxygen and polluting the water body.
Environmental Impact
The consequences of milk pollution are high, but not irreversible. While water bodies may eventually recover, the impact on aquatic life can be catastrophic if the pollution exceeds the ecosystem’s capacity to handle it. Milk also has nutrients like nitrogen and phosphorous that can also lead to algal blooms and eutrophication.
Efforts to mitigate milk pollution must involve education, proper waste management, and the implementation of sustainable practices to protect our water resources.
Conclusion
Even everyday items like milk can harm our water bodies and pose polluting potential. By learning about milk’s dangers and taking action to stop its pollution, we can keep our water clean for the future.
While some level of pollution is inevitable in natural environments, we must strive to minimize our impact and preserve the delicate balance of aquatic ecosystems.
Water can also appear milky white due to vigorous aeration which is a different thing and might get confused with Milk pollution.
Sources:
- https://www.jsonline.com/story/news/local/wisconsin/2020/04/03/coronavirus-milk-dumping-could-harm-environment/2938784001/
- https://www.thesun.co.uk/news/14665052/thousands-of-gallons-milk-turn-river-white-after-crash/
- https://www.desmoinesregister.com/story/news/local/ankeny/2017/06/20/up-7-500-gallons-milk-spill-into-iowa-waterway/413699001/#:~:text=A%20tanker%20hauling%20milk%20in,according%20to%20the%20Iowa%20DNR.
- https://extension.psu.edu/programs/nutrient-management/planning-resources/other-planning-resources/milkhouse-wastewater-characterisitics/view
Rakesh Shah (Civil and Environmental Engineer)
Author