Solution：Utilized MicroMotion®-N,to address shock loads on the nitrification system caused by high concentrations of styrene, acrylonitrile, and other components in the influent.
Processing Scale：8500m³/d
Treatment Effect：Ammonia nitrogen in the effluent from the biological tank was reduced to below 5 mg/L.
Characteristics
Styrene, acrylonitrile, toluene, ethylbenzene, petroleum hydrocarbons, total chromium, total nickel, etc
① High salinity
② High organic nitrogen
③ High total nitrogen
④ High ammonia nitrogen
⑤ Complex influent composition
Plant Profile
Option
1. Conducted data analysis and confirmed that elevated concentrations of toxic substances (e.g., free ammonia) were inhibiting nitrifying bacterial activity.
2. Reduced influent flow and selectively applied oxic holding to stabilize the system.
3. Ensured sufficient system alkalinity (alkalinity > 7.14 times the ammonia nitrogen concentration), maintained aerobic dissolved oxygen above 2 mg/L, and kept pH between 8.0 and 8.5.
4. Dosed 400 kg of MicroMotion®-N to restore and strengthen nitrification capacity.
Result
After corresponding adjustments, the ammonia nitrogen removal rate reached 99%, with effluent ammonia nitrogen consistently maintained below 5 mg/L, meeting discharge standards and restoring system operation.
Periodic Service
