Improving performance and efficiency of partial anammox by coupling partial nitrification and partial denitrification (PN/A-PD/A) to treat municipal sewage in a step-feed reactor

被引：56
作者：
Gao, Ruitao [1 ]
Peng, Yongzhen [1 ]
Li, Jianwei [1 ]
Zhang, Qiong [1 ]
Li, Xiyao [1 ]
Deng, Liyan [1 ]
Li, Wenyu [1 ]
Kao, Chengkun [1 ]
机构：
[1] Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 341卷
关键词：
Anammox; Mainstream; Partial denitrification; Partial nitrification; Sewage; MAINSTREAM PARTIAL NITRITATION; NITROGEN REMOVAL PERFORMANCE; ACTIVATED-SLUDGE; WASTE-WATER; OXIDIZING BACTERIA; TREATMENT PLANTS; AMMONIA REMOVAL; BIOFILM; FLOCS;
D O I：
10.1016/j.biortech.2021.125804
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Improving contribution and nitrogen removal efficiency (NRE) of partial anammox in municipal wastewater is a researching hotspot. This study developed an innovative PN/A-PD/A process with fixed biocarriers in anaerobic/anoxic chambers for actual sewage treatment in a typical step-feed reactor over 390 days. Two coupled pathways providing continuous NO2- (partial nitrification in oxic chambers and partial denitrification in anaerobic/anoxic chambers) for anammox were introduced to the process, achieving 47% nitrogen loss by anammox in stable phase. The influent and effluent total inorganic nitrogen (TIN) were 51.3 and 11.0 mg/L, respectively, even with chemical oxygen demand (COD)/TIN ratio of 2.9. Anammox activity improved from 6.52 to 9.68 mg NH4+-N/gMLSS/d and abundance on the biocarriers raised to 3.16 x 10(10) gene copies/g dry sludge. Overall, this study confirmed partial anammox, spatially coupled with partial nitrification and partial denitrification via oxic/anoxic distribution with step feed mode, as an alternative for application of mainstream anammox.
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页数：10
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