My plant services a prison so my influent is very consistent. My lbs. are 5800-6400 MLSS. TN #'s less than an 8 mg-L or lower . We don't keep track of ammonia #'s I have ability to test for ammonia but should I test before of after chlorination? Phosphorus is usually lower than 10 mg-L. My permit does not have a limit for TN or TP but I do have a limit for NO3 of 12 mg-L. I appreciate the help I'm still learning.
I ran a plant very similar. And you need to test the ammonia as well because you have to nitrify before you can denitrify. It sounds like though nitrification in your plant isn’t reaching is potential. I would try adjusting the times on the blowers. Instead of 30 minute cycles try running 1 hour cycles. I started with 30 minute cycles and ended with 2 hour cycles at my plant. That alone dropped my nitrogen from a 8 to around a 1 mg/L. Because it allowed more time for nitrification to occur and then allowed more time for denitrification to occur without interruption. Also play with the lbs. every plant Cadillac’s at a different amount of lbs. I ran mine around 5,000 and adjusted the RAS to maintain that and got on a schedule where I wasted a certain amount of time a number of days a week. It’s all trial and error. You have to learn how your plant runs the best and make that your control. But I would test the ammonia and nitrogen in the effluent after chlorination everyday. This will give you an understanding of how your plant is working. If your nitrogen is super high but your ammonia is supper low You can lower the D.O in your plant a little to where it doesn’t take so long for denitrification to start occurring after the air turns off and vice versa. I hope this helps!