WANGNa,QINKai-kai,YAOXue-wei,et al.Two-stage MBBR of Partial Nitritation-ANAMMOX for Treatment of Thermal-hydrolysis Anaerobic Digester Effluent[J].China Water & Wastewater,2024,40(13):61-67.
Two-stage MBBR of Partial Nitritation-ANAMMOX for Treatment of Thermal-hydrolysis Anaerobic Digester Effluent
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第13期
Page:
61-67
Column:
Date of publication:
2024-07-01
- Keywords:
- thermal-hydrolysis anaerobic digester effluent; partial nitritation; ANAMMOX; moving-bed biofilm reactor (MBBR)
- Abstract:
- A two-stage MBBR of partial nitritation-ANAMMOX process was employed for the treatment of thermal-hydrolysis anaerobic digester effluent with high ammonia nitrogen. When the influent NH4+-N was (750.32±32.21) mg/L, the partial nitritation reactor reached a nitrogen load of 1.25 kg/(m3·d), with an average effluent NO2--N/NH4+-N ratio of 1.18±0.18, meeting the influent quality requirement for ANAMMOX. The ANAMMOX reactor was capable of reaching a nitrogen load of 0.84 kg/(m3·d), with an average TN removal rate of 76.05%. Under the condition of influent COD at (932±39) mg/L, the effluent COD from the partial nitritation and ANAMMOX reactors were (623±43) mg/L and (590±45) mg/L, respectively. The degradation of COD was primarily achieved in the partial nitritation reactor, with its contribution to COD removal reaching 87.16%. After treating thermal-hydrolysis anaerobic digester effluent, the activities of ammonia oxidizing bacteria (AOB) and ANAMMOX bacteria decreased by 21.17% and 39.82%, respectively, indicating that the complex organic matter had an inhibitory effect on nitrogen removal microorganisms, particularly on ANAMMOX bacteria.
Last Update:
2024-07-01