| 摘要 |
<p>The invention relates to a fixed-bed reactor (7) for purifying wastewater, comprising at least: a first layer (1) made of a granular first carrier material, a second layer (2) located above the first layer and made of a granular second carrier material that has a lower density than the first carrier material but is heavier than water, and a supply (3) for wastewater near the base of the fixed-bed reactor (7). Because the first carrier material has a greater grain size than the second carrier material, the specialization of different layers of the fixed bed can be better maintained after flushing, and the time until the next flushing can be reduced.</p> |
