Current studentsExisting staffContact us
 

Optimizing nitrogen removal in a hybrid oxidation ditch

Simple item page
dc.contributor.authorAgbewornu, K.C.D.
dc.contributor.authorAdyel, T.M.
dc.contributor.authorZhai, J.
dc.date.issued2021
dc.descriptionData source: Supplementary material, https://doi.org/10.1016/j.jece.2021.105443
dc.description.abstractWastewater treatment plants are now facing the challenges of high cost, high energy consumption, while effluent quality is relatively poor with total nitrogen concentration exceeding the requirement of reuse. This study investigated the performance of contaminants removal, especially nitrogen by a hybrid oxidation ditch (H-OD) which is based on the theory of integrated fixed-film activated sludge under different control factors. The aeration rate, return ratio and hydraulic loading were controlled at 0.4 m³/h, 100% and 0.55 m³/m³ h, respectively as the optimized control parameter values. Under the optimized conditions, the effluent concentrations of chemical oxygen demand and ammonium were 35.8 mg/L, 1.04 mg/L, respectively, while the suspended solid was below 10 mg/L. The average removal rate of total nitrogen was 72.8%, and simultaneous nitrification and denitrification (SND) was achieved at 42.7%. Besides, when the carbon/nitogen ratio was maintained from 2.12 to 5.56, the complete nitrification and denitrification was obtained. The results showed that the H-OD was suitable for nitrogen removal and SND was very attractive for practical engineering applications.
dc.identifier.citationJournal of Environmental Chemical Engineering, 2021; 9(4, article no. 105443):105443-105443
dc.identifier.doi10.1016/j.jece.2021.105443
dc.identifier.issn2213-2929
dc.identifier.urihttps://hdl.handle.net/11541.2/33566
dc.language.isoen
dc.publisherElsevier
dc.relation.fundingNational Natural Science Foundation of China 51878093
dc.relation.fundingScientific and Technical Research Project of Chongqing Municipality cstc2017zdcyzdyfX0030
dc.rightsCopyright 2021 Elsevier
dc.source.urihttps://doi.org/10.1016/j.jece.2021.105443
dc.subjectnitrogen removal
dc.subjectsimultaneous nitrification and denitrification
dc.subjecthybrid oxidation ditch
dc.subjectreactor efficiency
dc.subjectintegrated fixed-film activated sludge
dc.titleOptimizing nitrogen removal in a hybrid oxidation ditch
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9916727921301831

Files

Collections