title: [Optimization Study on the Nitrogen and Phosphorus Removal of Modified Two- sludge System Under the Condition of Low Carbon Source].
abstract: This paper explored the method of resolving insufficient carbon source in urban sewage by comparing and analyzing denitrification and phosphorus removal (NPR) effect between modified two-sludge system and traditional anaerobic-aerobic-anoxic process under the condition of low carbon source wastewater. The modified two-sludge system was the experimental reactor, which was optimized by adding two stages of micro-aeration (aeration rate 0.5 L · mm⁻¹) in the anoxic period of the original two-sludge system, and multi-stage anaerobic-aerobic-anoxic SBR was the control reactor. When the influent COD, ammonia nitrogen, SOP concentration were respectively 200, 35, 10 mg · L⁻¹, the NPR effect of the experimental reactor was hetter than that of thecontrol reactor with the removal efficiency of TN being 94.8% vs 60.9%, and TP removal being 96.5% vs 75%, respectively. The effluent SOP, ammonia, TN concentration of the experimental reactor were 0.35, 0.50, 1.82 mg · L⁻¹, respectively, which could fully meet the first class of A standard of the Pollutants Emission Standard of Urban Wastewater Treatment Firm (GB 18918-2002). Using the optimized treatment process, the largest amounts of nitrogen and phosphorus removal per unit carbon source (as COD) were 0.17 g · g⁻¹ and 0.048 g · g⁻¹ respectively, which could furthest solve the lower carbon concentration in current municipal wastewater.
authors.forename: Wei-qiang
authors.initials: WQ
authors.lastname: Yang
authors.forename: Dong-bo
authors.initials: DB
authors.lastname: Wang
authors.forename: Xiao-ming
authors.initials: XM
authors.lastname: Li
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
authors.forename: Qiu-xiang
authors.initials: QX
authors.lastname: Xu
authors.forename: Zhi-bei
authors.initials: ZB
authors.lastname: Zhang
authors.forename: Zhi-jun
authors.initials: ZJ
authors.lastname: Li
authors.forename: Hai-hong
authors.initials: HH
authors.lastname: Xiang
authors.forename: Ya-li
authors.initials: YL
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
mesh_terms: D000641:Ammonia / Q000737:chemistry; D019149:Bioreactors; D002244:Carbon / Q000737:chemistry*; D058440:Denitrification; D009584:Nitrogen / Q000302:isolation & purification*; D010758:Phosphorus / Q000302:isolation & purification*; D012722:Sewage / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D000641:Ammonia; D002244:Carbon; D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater