title: Nitrogen removal from medium-age landfill leachate via post-denitrification driven by PHAs and glycogen in a single sequencing batch reactor.
abstract: An anaerobic/aerobic/anoxic (AOA) process in a sequencing batch reactor (SBR) was proposed to treat typical medium-age landfill leachate without extra carbon addition. In a steady-state, the average removal efficiencies of NH4(+)-N, total nitrogen (TN) and COD were 99.7 ± 0.1%, 98.3 ± 0.3% and 89.8 ± 1.4%, when influent NH4(+)-N, TN and COD were 1025-1327 mg/L, 1346-1854 mg/L and 6430-9372 mg/L, respectively. In the anaerobic stage, dissolved organic matter was taken up partially and stored as polyhydroxyalkanoates (PHAs) with concomitant consumption of glycogen. In the aerobic stage, PHAs was oxidized and glycogen was replenished in the bacterial cells, when TN of 75.4 mg/L was removed via simultaneous nitrification and denitrification (SND). The residual nitrate and nitrite were denitrified completely by utilizing residual PHAs and glycogen as electron donors in the anoxic phase. Denitrifying glycogen accumulating organisms (GAOs) were considered to be playing the major role in the process.
authors: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors: Zhongming
authors: Z
authors: Li
authors: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors: Shuying
authors: S
authors: Wang
authors: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors: Weitang
authors: W
authors: Zhang
authors: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors: Lei
authors: L
authors: Miao
authors: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors: Tianhao
authors: T
authors: Cao
authors: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China. Electronic address: pyz@bjut.edu.cn.
authors: Yongzhen
authors: Y
authors: Peng
mesh_terms: D000332:Aerobiosis / Q000187:drug effects; D000693:Anaerobiosis / Q000187:drug effects; D061249:Batch Cell Culture Techniques / Q000295:instrumentation*; D001673:Biodegradation, Environmental / Q000187:drug effects; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000494:pharmacology; D058440:Denitrification / Q000187:drug effects; D006003:Glycogen / Q000494:pharmacology*; D009584:Nitrogen / Q000302:isolation & purification* / Q000494:pharmacology; D054813:Polyhydroxyalkanoates / Q000494:pharmacology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D054813:Polyhydroxyalkanoates; D014874:Water Pollutants, Chemical; D002244:Carbon; D006003:Glycogen; D009584:Nitrogen
keywords: Denitrifying GAOs; Glycogen; Landfill leachate; PHAs; Post-anoxic denitrification