WEF Discussion Forums
Biological Nutrient Removal
This last month our SVIs have slowly been increasing. It is now to the point where the clarifiers are bulking. There are no signs of bulking filaments (Type 021N) and very little signs of microorganisms under the microscope. The floc looks extremely dispersed and nothing can seem to attach to what little floc is there.
This is very perplexing because the nitrification/denitrification is doing extremely well. I cannot grasp the fact the autotrophic organisms are having no problems whatsoever. In the past, the autotrophs have always been the organisms first to go when we felt as though something toxic hit the Plant. Usually we see ammonia bleed through in the secondaries. Another unusual note is that our Nitrate numbers have dropped a couple parts. My feeling is that there is more carbon available in the anoxic zone because it is not being assimilated in aeration. Just a thought!!!
All the analyses we have done to find the smoking gun are not showing any unusual differences or higher than normal numbers. Has anybody else seen this anomoly?