The pH of your effluent is a common metric, but more than that, maintaining a pH in the neutral 6 to 8 range is crucial to maintaining the biological treatment in your wastewater facility. The nitrification bacteria, which use enormous amounts of alkalinity as they nitrate the ammonia in your wastewater, rely on maintaining the alkalinity of your wastewater.
How to remove of Phosphorus from Wastewater?
Controlling phosphorus discharged from municipal and industrial wastewater treatment plants is a critical component of preventing surface water eutrophication. Phosphorous is one of the most important nutrients in the eutrophication of lakes and natural waters. Its presence causes a slew of water quality difficulties, including higher purification costs, diminished recreational and conservation value of impoundments, livestock losses, and the risk of algae toxins becoming fatal in drinking water.
Chemical precipitation is currently used to remove phosphates, which is costly and results in a 40% increase in sludge volume. Biological phosphate removal is another option (BPR). Maintaining this balance is significantly more challenging if you are eliminating phosphorus from your wastewater.
The Seesaw of pH
Traditional phosphorus eliminating coagulants based on aluminium or iron-based salts have a pH range of 1.5 to 2.2, making them highly acidic. The volume required to remove phosphorus to low discharge limits magnifies the impact of this low pH. As the phosphorus limit is reduced, the amount of coagulant required increases to 4 or more molecules for every molecule of phosphate removed.
Your treatment will be jeopardised if you don't correct the pH imbalance. You're probably using a lot of caustic to bring your pH back into the neutral region and restore alkalinity. As a result, you go back and forth between standard coagulants and caustic.
Your operators are also at risk from these very acidic and basic compounds. The caustic is exactly as harmful as the acidic coagulant, which is exceedingly irritating to the skin, eyes, and lungs. It is an extremely dangerous procedure to mix caustic oneself from bags. Even the most dilute solution has a high freezing point once it's been mixed, therefore the tank and pipes must be kept warm.
Have you ever had a heat tracing failure that resulted in a frozen pipe or, worse, a complete tank full with frozen caustic? How dangerous was it to fix that?
However, you don't have to operate in this manner, swinging back and forth on pH to remove phosphorus and then adjusting it back up to remove ammonia, or simply maintain your biomass while continually balancing your chemical feeds.
With nearly a blip on your pH metre, Netsol Water water treatment precipitates phosphorus down to very low levels, well under 0.1 mg/L.
What does Netsol Water Solution do to achieve this?
For starters, the water treatment provided by Netsol Water Solution is less acidic, with a pH of 3 to 4. It is, however, still acidic. Because pH is measured on a logarithmic scale, a difference of two in your pH, such as between 4 and 2, equals 100 times less acid. When this is combined with the low feed rate, the true impact is made.
Netsol Water treatment works on a nearly one-to-one basis, i.e., one molecule of water treatment removes one molecule of phosphate – and this ratio is true no matter how low your limit is.So, instead of feeding at a molar ratio of 4 to 1 or more, you're feeding four times less. Almost all wastewater systems have enough excess alkalinity that even a modest amount of acid does not cause a significant pH reduction.