What is the impact of TDS on 30,000 pairs of contact oxidation?
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What is being treated now is incinerated wastewater, with the main source being wastewater from spray towers. After air flotation, the wastewater proceeds to the physicochemical treatment stage in the redox precipitation tank; following that are two stages of contact oxidation – the first stage involves stirred hydrolysis and acidification, while the second stage involves aeration. The aeration tank has a volume of 96 m3. The pH of the water fed into it is around 9, with a COD level of 700, ammonia nitrogen at 15, total phosphorus at 8, and TDS at 29,600. During the initial setup phase, nutrients and tap water were added to cultivate sludge; this sludge came from an industrial wastewater treatment plant. When the COD level in the effluent was 80, production wastewater began to be fed in at a flow rate of 1 m3/h. However, the COD level in the effluent remained around 220. I would like to know what the problem might be – could it be that the high salt content is inhibiting the growth of microorganisms? How should this problem be solved?
This post was last edited by CoCo070563 on 2015-7-24 at 18:48. If the wastewater from the spray tower undergoes air flotation before entering the physicochemical treatment stage of the redox precipitation tank, then there are two stages of contact oxidation: the first stage involves stirred hydrolysis and acidification, while the second stage involves aeration. The aeration tank has a volume of 96 m3. The pH of the water fed into it is around 9 per day, with a COD level of 700, ammonia nitrogen at 15, total phosphorus at 8, and TDS at 29,600. During the initial adjustment phase, nutrients and tap water were added to cultivate the sludge; this sludge came from an industrial wastewater treatment plant. When the COD level in the effluent was 80, production wastewater began to be fed in at a flow rate of 1 m3/h. As a result, the COD level in the effluent was around 220. The pH of the incoming water was somewhat high; since production wastewater was just being introduced and the sludge was still in the acclimation stage, it was normal for the COD level in the effluent to increase.
The pH is a bit high, and the salt content is indeed high. During operation, the TDS level here does not exceed 15,000; try keeping the pH at 7.5