WANG Hong,WU Sha,LIU Ke,et al.Performance of ANAMMOX Reactor Enhanced by Nitrogen Load Lifting Method[J].China Water & Wastewater,2021,37(9 9):90-96.
Performance of ANAMMOX Reactor Enhanced by Nitrogen Load Lifting Method
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
9 9
Page:
90-96
Column:
Date of publication:
2021-05-01
- Keywords:
- ANAMMOX; substrate concentration; hydraulic retention time (HRT); granular sludge; performance enhancement
- Abstract:
- ANAMMOX reactor was operated by two nitrogen load lifting methods including stepwise increasing of substrate concentration and shortening hydraulic retention time (HRT),and effects of the two different methods on performance of ANAMMOX reactor were compared. During 300 days of operation, the removal efficiencies of NH4+-N，NO2--N and TN could reach 93.09%, 95.26% and 88.46%, respectively,and the nitrogen load removal rate increased from 0.75 kg/(m3·d) to 2.26 kg/(m3·d). ΔNO2--N/ΔNH4+-N and ΔNO3--N/ΔNH4+-N were 1.12 and 0.14 during stable stage, which was close to the theoretical value. The pH of the effluent gradually increased and finally tended to be stable in phase Ⅲ. Gas production per unit volume of sludge reached 1.51 L/(L·d). Particle size of the sludge increased to 5.0-7.0 mm,and settling velocity increased to (8.94±0.77) cm/s. A large amount of scarlet granules were observed,which enhanced the denitrification performance. Compared with the strategy of increasing substrate concentration, low-concentration influent and shortening HRT to increase nitrogen load could avoid the inhibition effect of the substrate itself, and quickly enhanced and stabilized the performance of the ANAMMOX reactor, which was conducive to the formation of granular sludge.
Last Update:
2021-05-01