| 摘要 |
<p>Process for the psychrophile biological purification of waste waters with medium-low concentrations of polluting substances, consisting in a first anaerobic treatment with an expanded mud bed of U.A.S.B. type at a low flow rate, in a second, fluid-bed treatment on a fine support at a high flow rate, and in an end, aerobic treatment for the nitrification and the end oxydation of the various substances reduced in the previous treatments, then recycled to the upstream steps for the removal of possible nutrients, such as nitrogen and phosphorus.</p> |
