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Huan Jing Ke Xue. 2018 Jun 8;39(6):2740-2747. doi: 10.13227/j.hjkx.201710101.

[Start-up and Process Characteristics of Simultaneous ANAMMOX and Denitrification (SAD) in a Pilot-scale Anaerobic Sequencing Batch Reactor (ASBR)].

[Article in Chinese]

Author information

1
School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
2
Wuhan Kaidi Electric Power Environmental Co., Ltd., Wuhan 430023, China.

Abstract

A pilot scale anaerobic sequencing batch reactor (ASBR, working volume 530 L), inoculated by anaerobic sludge from an A2O process, was developed to investigate the start-up of anaerobic ammonia oxidation (ANAMMOX) and its combination with denitrification for deep-level nitrogen removal from saline wastewater. Simultaneously, the flora structure was analyzed. Results showed that under the conditions of temperature 35℃±1℃ and reaction time 14 h, ANAMMOX was successfully started-up after 160 days of operation. During the stabilized operation stage, ANAMMOX coupled with denitrification (SAD) led to a total nitrogen (TN) removal efficiency and removal rate of 91.1% and 0.45 kg·(m3·d)-1, respectively. The successful cultivated sludge formed granules and presented as a light red color, with the main bacteria genus being Candidatus Brocadia (10.6%). Additionally, high efficiency nitrogen and organic carbon removal (COD and TN removal efficiency of 93.2% and 90.0%, respectively) from wastewater simulating desulfurization and denitrification tailings with high salinity (Cl- concentration of 8000 mg·L-1) was achieved in the SAD system by gradually increasing the salinity gradient. Moreover, the denitrification in SAD was mostly NO3--N→N2, with partial denitrification (NO3--N→NO2--N) accounting for only 30.3%.

KEYWORDS:

anaerobic ammonia oxidation (ANAMMOX); anaerobic sequencing batch reactor (ASBR); denitrification; saline wastewater; simultaneous ANAMMOX and denitrification (SAD)

PMID:
29965630
DOI:
10.13227/j.hjkx.201710101
[Indexed for MEDLINE]

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