Nitrogen removal from coke making wastewater through a pre-denitrification activated sludge process
dc.contributor.author | Raper, Eleanor | |
dc.contributor.author | Fisher, R. | |
dc.contributor.author | Anderson, D. R. | |
dc.contributor.author | Stephenson, Tom | |
dc.contributor.author | Soares, Ana | |
dc.date.accessioned | 2019-03-04T11:52:24Z | |
dc.date.available | 2019-03-04T11:52:24Z | |
dc.date.issued | 2019-02-14 | |
dc.description.abstract | Under the Industrial Emissions Directive (IED), coke production wastewater must be treated to produce an effluent characterised by a total nitrogen (TN) <50 mg/L. An anoxic-aerobic activated sludge pilot-plant (1 m3) fed with coke production wastewater was used to investigate the optimal operational requirements to achieve such an effluent. The loading rates applied to the pilot-plant varied between 0.198–0.418 kg COD/m3.day and 0.029–0.081 kg TN/m3.day, respectively. The ammonia (NH4+-N) removals were maintained at 96%, after alkalinity addition. Under all conditions, phenol and SCN− remained stable at 96% and 100%, respectively with both being utilised as carbon sources during denitrification. The obtained results showed that influent soluble chemical oxygen demand (sCOD) to TN ratio of should be maintained at >5.7 to produce an effluent TN <50 mg/L. Furthermore, nitrite accumulation was observed under all conditions indicating a disturbance to the denitrification pathway. Overall, the anoxic-aerobic activated sludge process was shown to be a robust and reliable technology to treat coke making wastewater and achieve the IED requirements. Nevertheless, the influent to the anoxic tank should be monitored to ensure a sCOD:TN ratio >5.7 or, alternately, the addition of an external carbon source should be considered. | en_UK |
dc.identifier.citation | E Raper, R Fisher, DR Anderson, et al., (2019) Nitrogen removal from coke making wastewater through a pre-denitrification activated sludge process. Science of The Total Environment, Volume 666, May 2019, pp. 31-38 | en_UK |
dc.identifier.issn | 0048-9697 | |
dc.identifier.uri | https://doi.org/10.1016/j.scitotenv.2019.02.196 | |
dc.identifier.uri | http://dspace.lib.cranfield.ac.uk/handle/1826/13957 | |
dc.language.iso | en | en_UK |
dc.publisher | Elsevier | en_UK |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Coke making wastewater | en_UK |
dc.subject | Nitrification | en_UK |
dc.subject | Denitrification | en_UK |
dc.subject | sCOD:TN ratio | en_UK |
dc.subject | Nitrate-respiring bacteria | en_UK |
dc.title | Nitrogen removal from coke making wastewater through a pre-denitrification activated sludge process | en_UK |
dc.type | Article | en_UK |