The nitrate nitrogen in the effluent is higher than that in the inlet water
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The constructed wetland is used to remove nitrate nitrogen; the influent contains no organic carbon source, only sodium bicarbonate. Everything was normal before, so why is the nitrate nitrogen level in the effluent suddenly higher than that in the influent? The filler seems to have little effect on the adsorption of *ao acid salt nitrogen. I hope experts can offer some guidance!
1. Is the filler saturated with adsorption?； 2. Is it a measurement error? ； 3. The sampling is not representative.
It’s possible that the filler has become saturated with adsorption; a definitive conclusion will require further observation.
Has a conclusion been reached? I’d like to share this with everyone.
After observing for two days, the nitrate level returned to normal: L