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| Effect of Influent Concentrations of Ammoniacal Nitrogen on SBR Treatment for Swine Wastewater |
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| KeyWord:SBR; swine wastewater; ammoniacal nitrogen concentration; denitrification; dephosphorization; COD removal |
| Author Name | Affiliation | | MENG Xiang-zhi | College of Science, Northwest A&F University | | MENG Zhao-fu | College of Natural Resource and Environment, Northwest A&F University | | ZHAO Jun-nan | College of Science, Northwest A&F University | | ZHU Jun | Bioproducts and Biosystems Engineering Department, University of Minnesota | | YAN Xiao-yi | College of Science, Northwest A&F University | | LIU Juan | College of Science, Northwest A&F University |
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| Abstract: |
| After started with low concentration swine wastewater, using a sequencing batch reactor（SBR） at steady state to dispose swine wastewater, the studies on the characteristics of effluent water of SBR at different influent concentration of ammoniacal nitrogen were conducted, its purpose is to reveal the adaptive time and removal efficiency of SBR corresponding to different influent concentration of ammoniacal nitrogen. The results showed that ammoniacal nitrogen, COD and phosphorus in effluent water of SBR at steady state reached（6.37±1.70）mg·L-1,（409.90±77.00）mg·L-1 and（7.29±0.13）mg·L-1, corresponding their average removal rate were 99.25%, 84.18% and 74.09%, respectively. With an increase of influent concentration of ammoniacal nitrogen, the SBR was in shock state in first ten days and reached steady state subsequently. Ammoniacal nitrogen, COD and phosphorus in SBR changed in a wave style in shock period, while they tended to stable in steady period. The ability of denitrogenation of SBR was promoted, while the removal efficiency of COD and phosphorus were decreased at the same time in steady period. The degradable ability of COD could be recovered by a long-term domestication with high influent concentration of ammoniacal nitrogen, and the sufficient COD concentration in feeding wastewater played an important role in dephosphorization ability of SBR at high influent concentration of ammoniacal nitrogen. |
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