AO process: What to do if high pH of 9 in the aerobic tank causes ammonia poisoning?
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Currently, no nitrification occurs in the aerobic tank, resulting in high ammonia nitrogen levels in the effluent
The ammonia nitrogen level in the incoming water needs to be controlled. High-concentration substances need to be pre-treated or diluted before being introduced into the system. This is my personal opinion for reference only.
How much settlement is there now? Adjust the pH of the aerobic tank first
Reduce backflow and increase aeration to first restore the normal pH in the nitrification tank.
A high pH does not affect the nitrification reaction, but it affects denitrification.
The reasons for the absence of nitrification need to be identified first; generally, insufficient residence time, inadequate aeration, and high organic load can inhibit the growth and reproduction of nitrifying bacteria, thereby preventing the occurrence of nitrification.