dc.contributor.author | Aslan, Sukru | |
dc.contributor.author | Simsek, Erdal | |
dc.date.accessioned | 2019-07-27T12:10:23Z | |
dc.date.accessioned | 2019-07-28T09:40:07Z | |
dc.date.available | 2019-07-27T12:10:23Z | |
dc.date.available | 2019-07-28T09:40:07Z | |
dc.date.issued | 2017 | |
dc.identifier.issn | 1582-9596 | |
dc.identifier.issn | 1843-3707 | |
dc.identifier.uri | https://dx.doi.org/10.30638/eemj.2017.234 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/6633 | |
dc.description | WOS: 000419141300009 | en_US |
dc.description.abstract | The partial nitrification bioreactor (PNBR) was operated at a constant temperature and an influent synthetic wastewater pH of 35 degrees C and 8.5, respectively. The effects of dissolved oxygen concentrations (DO), hydraulic retention times (HRT), and the nitrogen loading rates (NLR) on the ammonium removal efficiencies and the NO2-N/NOx-N ratio were investigated. The activity of nitrite oxidizing bacteria was stimulated at high DO concentrations. The highest NO2-N/NOx-N ratio of 0.76 was obtained at the DO concentrations of 1.9 mg/L. The NLRs and HRTs significantly affect the NO2-N accumulation in the PNBR. Although the most of NH4-N (98%) was oxidized at the HRT of 10.3 h, the ratio of NO2-N/NOx-N [NO2-N/(NO2-N+NO3-N)] was too low (0.33). The removal efficiency of NH4-N descended to 92% while the ratio of NO2-N/NOx-N achieved the highest level of 0.74 at the HRT of 5.2 h. At the NLR of 830 g NH4-N/m(3). day, the ratio of NO2-N/NOx-N reached to the highest level of 0.76 under the operational conditions. However, the removal efficiency of NH4-N decreased from 94% to 92%. Further increased the NLR caused the deterioration of NH4-N oxidation and NO2-N/NOx-N ratio. The stable NO2-N production rate of about 810 g/m3. day (2.5 g/m(2). day) was obtained under the NLR and surface loading rate of 830 g NH4-N/m(3). day and 3.55 g/m(2). day, respectively. | en_US |
dc.description.sponsorship | Cumhuriyet University, Sivas, Turkey [M-376] | en_US |
dc.description.sponsorship | This work is supported by the Scientific Research Project Fund of Cumhuriyet University under the project number M-376, Sivas, Turkey. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | GH ASACHI TECHNICAL UNIV IASI | en_US |
dc.relation.isversionof | 10.30638/eemj.2017.234 | en_US |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | DO | en_US |
dc.subject | HRT | en_US |
dc.subject | NLR | en_US |
dc.subject | NO2-N/NOx-N ratio | en_US |
dc.subject | partial nitrification | en_US |
dc.title | OPTIMIZATION OF OPERATIONAL CONDITIONS FOR NITRITE ACCUMULATION IN A SUBMERGED BIOFILTER | en_US |
dc.type | article | en_US |
dc.relation.journal | ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL | en_US |
dc.contributor.department | [Aslan, Sukru -- Simsek, Erdal] Cumhuriyet Univ, Engn Fac, Dept Environm Engn, TR-58140 Sivas, Turkey | en_US |
dc.identifier.volume | 16 | en_US |
dc.identifier.issue | 10 | en_US |
dc.identifier.endpage | 2274 | en_US |
dc.identifier.startpage | 2267 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |