Peculiarity
Low water temperature in cold seasons makes it difficult to meet discharge standards for ammonia nitrogen and total nitrogen.
Large daily fluctuations in influent volume worsen sludge settling ratios, increasing the risk of sludge washout or tank overflow.
Imbalanced CODcr/TN ratio, with high concentrations of ammonia nitrogen and total phosphorus in the influent.
Presence of surfactants, proteins, fats, and oils in the influent causes strong odours in the pretreatment stage.
Q&A.
Odour nuisance incidents occurred during hot seasons.
Under low-temperature conditions, ammonia and total nitrogen removal could not be reliably ensured.
Poor sludge settling performance with filamentous and non-filamentous bacterial bulking.
High cost of carbon source dosing required to ensure total nitrogen compliance.
Solution
