Chemical Plant Success Story
Background:
A chemical plant manufactures chemicals from tree stump rosin. The chemicals range from additives for fruit juices to additives for chewing gum.
Problem:
The effluent from the chemical plant is discharged into the city sewer and a permit from the city controls the COD concentration. When the permit value is exceeded a surcharge is enforced.
Solution:
To eliminate the surcharges by the city, the chemical plant installed an effluent equalization system. This system is designed to remove peak loads by discharging the effluent into one of two equalization tanks. To be able to do this correctly, peak loads need to be detected in real-time; to do this, the chemical plant installed an EloxMonitor.
Conclusion:
By monitoring the influent entering the tanks and the effluent leaving the tanks, chemical plants have been able to control their COD discharge within the permitted values and as a result prevent paying excessive surcharges.
In reality many companies are discharging into their city sewer above their permit values and pay surcharges for the privilege. Typically, in the case of industrial effluent, concentration peaks due to discharge from individual processing units are normal. If a company installs a control/equalization system like the one in this example, these peaks can be blended into the lower-concentration effluent and as a result reduced the overall discharge.
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