title: [Shortcut Nitrosation-Denitrifying Phosphorus Removal Based on High-quality Carbon Source in Combined Process of CAMBR].
abstract: The volatile fatty acids (VFAs) are high-quality carbon source which can be utilized in the process of denitrifying phosphorus removal. Therefore, a combined process of anaerobic baffled reactor (ABR) with microbial phase separation and membrane bioreactor (MBR), i. e. CAMBR, with high-quality effluent was investigated in this experiment for highly efficient denitrifying phosphorus removal through providing high-quality carbon source by optimizing operational conditions such as hydraulic retention time (HRT) in the ABR. The results indicated that sufficient high-quality carbon source VFA could be acquired when the HRT of ABR was 4.8 h. The consumption of VFA was 56. 1 mg · L⁻¹ while the release of phosphorus was 10.43 mg · L⁻¹ showing that 5.38 mg of VFA was required to release 1 mg PO₄³⁻-P. Meanwhile, the uptake of phosphorus was 12. 35 mg · L⁻¹, while the uptake of phosphorus of MBR tank was 1.33 mg · L⁻¹. In the process of shortcut nitrification, 0.62 mg NOx⁻-N was needed when 1 mg PO₄³⁻-P was taken up, and 1.67 to 2.04 mg NO₂⁻-N was required when 1 mg PO₄³⁻-P was taken up, and the combined system achieved stable effluent quality. The average removal rates of COD, TN and soluble PO₄³⁻-P were 91%, 84% and 93%, respectively, correspondingly the average effluent concentrations were 30, 7.15 and 0.55 mg · L⁻¹, respectively. The results stated that the CAMBR achieved stable and highly efficient denitrifying phosphorus removal in domestic sewage treatment.
authors.forename: Ji-hui
authors.initials: JH
authors.lastname: Cheng
authors.forename: Peng
authors.initials: P
authors.lastname: Wu
authors.forename: Chao-yang
authors.initials: CY
authors.lastname: Cheng
authors.forename: Yao-liang
authors.initials: YL
authors.lastname: Shen
mesh_terms: D019149:Bioreactors; D002244:Carbon / Q000737:chemistry*; D058440:Denitrification; D005232:Fatty Acids, Volatile; D058465:Nitrification; D009584:Nitrogen; D015538:Nitrosation; D010758:Phosphorus / Q000737:chemistry*; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D005232:Fatty Acids, Volatile; D012722:Sewage; D010758:Phosphorus; D002244:Carbon; D009584:Nitrogen