Why does the pH of wastewater passing through a high-efficiency biological aerated filter (BAF) decrease in water treatment?
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The decrease in pH is quite extreme; the pH level is between 8 and 10 at the inlet, but after treatment through a high-efficiency biological aerated filter (BAF), it drops to around 4. I have no idea what’s causing this
This is an exaggeration; consider other possible sources of leakage – is it chlorine or sulfur? Has the instrument been calibrated?
That’s absurd; there’s a problem with the instrument – the pH won’t drop
Is the ammonia nitrogen level in the raw water high? This situation occurs when nitrification is good but denitrification is not effective
1. Measurement error； 2. Hydrolytic acidification occurs ； 3. Acidic water enters. The pH value during the nitration reaction will not drop below 6.5; the nitration reaction will cease when it approaches 6.5.