| 摘要 |
<p>1. Process for purifying waste waters containing nitrogenous organic products, said process comprising after grit removal and primary clarification a treatment for biological oxidizing and flocculation followed by a secondary clarification, enabling to reduce their residual content in nitrogenous products, characterized in that the biological treatment is carried out on a trickling bacterial aerobic bed with a percentage of vacuum superior to 90% but with a specific surface superior to 80 m**2 /m**3 , interrupting the biological treatment before complete transformation of carbonaceous matters, the consecutive increase in pH being achieved via a strong alkaline-earth base and inducing the flocculation which is followed by an air-driven degasification.</p> |
