Dempsey, Michael J. (2005) Particulate-biofilm, expanded-bed technology for high-rate, low-cost wastewater treatment: Nitrification. Water research, 39 (6). pp. 965-974. ISSN 0043-1354
|
Download (635kB) | Preview |
Abstract
The performance of a particulate-biofilm, expanded-bed process for nitrification of activated sludge final effluent (ASFE) is reported for a plant receiving mixed industrial and domestic wastewater. The support material for the particulate-biofilms was glassy coke, to which the nitrifying bacteria attached and formed a highly active biofilm. An average nitrification rate of 1.7±0.6 kg m−3expanded bed d−1 was recorded during operation of the bioreactor, which had a hydraulic residence time of 15 min. On average, the ASFE contained 12.6±3.7 g m−3 NH3–N, which was reduced to 2.6±3.3 g m−3 NH3–N. Furthermore, transfer of 10–12% of the oxygen in air was achieved using counter-current aeration. This investigation has demonstrated that a high rate of nitrification can be achieved with a particulate-biofilm, expanded-bed process. It has also demonstrated that the process can operate without backwashing and still remove particulate material from the ASFE feed.
Impact and Reach
Statistics
Additional statistics for this dataset are available via IRStats2.