| 摘要 |
<p>A wastewater treatment system (10) includes, in serial fluid communication, a first lagoon (11a), a first vertical flow marsh cell (12a), a second lagoon (11b), and a final marsh cell (12c). with process recycle from the final cell to the first lagoon. The lagoons function essentially aerobically, and both the lagoons and the marsh cells contain plant roots (20, 291) contacting incoming water. A tidal vertical flow system (10¨, 10¨) has atleast three marsh cells (12a'-12c') in serial forward fluid communication, incoming wastewater channeled to at least the first two cells, and a portion of water exiting a final cell recycled. Each cell is alternately flooded and drained for enhancing aeration of incoming water and cell contents, cell media (27) and plant roots having biofilm growing thereon. The biofilms include a population of nitrifying and denitrifying bacteria, for achieving substantially simultaneous nitrification and denitrification of the wastewater.</p> |
