Application Note: WWTP Pilots Ammonia-Based Aeration Control with Hach RTC-N to Optimize Nitrification

Document ID

Document ID CO301

Version

Version 2.0

Status

Status Published

Published Date

Published Date 10/11/2018
Question
Application Note: WWTP Pilots Ammonia-Based Aeration Control with Hach RTC-N to Optimize Nitrification
Summary
The diurnal ammonia loading fluctuates between 40.6 to 88.6 lbs/hr. To maximize nitrification, the DO concentration in the aeration basin trains is kept higher than necessary during most of the day in anticipation of increased load.
Answer
This plant, in San Bernardino, California, installed the Hach® Real-Time Control System for Nitrification, at one of the plant’s six aeration basin trains to measure ammonia and calculate the optimal DO setpoint in real-time. This would allow operators to gain insight into their process continuously instead of using discrete grab sample data points.

Real-time nitrification measurement allows the facility to lower DO to achieve ammonia effluent values of zero during the lower load periods. Also, it’s possible during high load periods to reduce inflow and maintain loading levels using existing equalization basins. This ensures compliance and opens the possibility for lower aeration energy costs.

WWTP Pilots Ammonia-Based Aeration Control with Hach RTC-N to Optimize Nitrification (US English)
 

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