Seeking help for the degradation of ammonia nitrogen in chemical plant wastewater
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The ammonia and oxygen levels in the wastewater treatment plant of the workshop are relatively high; degradation is achieved primarily through the nitrification process in the A/O tank. The retention time in tank A is around three hours, which should be sufficient. Another possibility is that the COD level is too low, resulting in a ratio to ammonia nitrogen that deviates significantly from the 100:5:1 value; in fact, it is 24:126:1. Additionally, the sludge concentration in the O tank is low. Would increasing the COD level artificially help? Seeking advice from experts
SBR will work for this; your carbon source is insufficient.
Increase the carbon source, dilute the incoming water, and strive to achieve balance
Ammonia nitrogen seems to have always been a challenge in wastewater treatment
Do front-end deamination; if carbon is added, the load on the AO tank also increases. If there is enough capacity in the AO tank to handle the additional load, then carbon can be added appropriately.
1. C/TN needs to be above 4 to ensure smooth denitrification; based on your data, the carbon source is clearly insufficient； 2. An ammonia nitrogen level of 350 mg/L or lower is just sufficient to ensure the proper operation of the biochemical system; if it is higher, ammonia nitrogen will act as a toxin that can cause malfunctions or even shutdown of the biochemical system ； 3. To ensure the proper progress of nitrification, the following conditions must be met: 1) A sufficient sludge age; generally, at least 15 days is required, as otherwise it is difficult to cultivate nitrifying bacteria ； 2) Sufficient dissolved oxygen; generally, it should not be lower than 1.5 at the outlet, otherwise the nitrification reaction will not proceed thoroughly ； 3) Lower organic matter concentration; generally, BOD5 should be less than 50 mg/L, otherwise aerobic bacteria will affect the growth and reproduction of nitrifying bacteria ； 4) Appropriate pH or alkalinity; the nitration reaction will be halted when the pH is below 6.5 ； 5) Appropriate water temperature: When the water temperature is below 15°C, the rate of nitrification is reduced by half compared to 25°C; when the temperature is below 10°C, nitrification essentially stops ； 6) Stable operation is required; nitrate bacteria are quite sensitive and living organisms are fragile, as significant fluctuations can cause the metabolism of nitrate bacteria to stop or disappear ；
Add me; use microbial ammonia nitrogen reduction agents, and it will recover quickly. QQ: 188768016
A carbon source should be added; domestic wastewater, crude methanol, or glucose can be used for this purpose. The carbon-to-nitrogen ratio needs to be adjusted, with the BOD5/TKN ratio generally kept above 4.0, and ideally above 5.7. To remove ammonia nitrogen, denitrification is necessary, which involves returning the mixture from the aerobic aeration tank to the anoxic zone