The investigation of aeration optimization in a pilot-scale anoxic-anaerobic oxidation ditch for nutrient removal from wastewater

DOI

10.2991/iceesd-18.2018.252How to use a DOI?

Keywords

Anoxic-anaerobic oxidation ditch, Biological nitrogen and phosphorus removal, Aeration optimization，Pilot-scale

Abstract

The performance of nitrogen and phosphorus removal in a pilot-scale anoxic-anaerobic oxidation ditch (OD) process was investigated. In order to achieve a high removal efficiency of nitrogen and phosphorus, the aeration was optimized and an anoxic zone was formed in the front of OD reactor, thus the operation condition was changed to anoxic/anaerobic/anoxic/aerobic. Denitrification and DPR was occurred in the formed anoxic zone, while SND was occurred in the back of the OD reactor, and energy costs were reduced as DO in the OD reactor was relatively low. The optimal parameters of DO, RSR, SRT and MLSS were 0.55~0.65 mg/L, 58 %, 12 days and 2416~2636 mg/L, respectively. The concentration of COD, TN, NH4+-N and TP in effluent was 18.2 mg/L, 13.8 mg/L, 3.6 mg/L and 0.42 mg/L, respectively, and the average removal rate of them was 94.1 %, 70.6 %, 91.8 % and 88.0 %, respectively.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - LiChao Nengzi
AU  - Ying Jiang
AU  - XiaoFang Li
AU  - WuJia Hailai
AU  - JinHua Ma
AU  - Rui Cao
PY  - 2018/05
DA  - 2018/05
TI  - The investigation of aeration optimization in a pilot-scale anoxic-anaerobic oxidation ditch for nutrient removal from wastewater
BT  - Proceedings of the 2018 7th International Conference on Energy, Environment and Sustainable Development (ICEESD 2018)
PB  - Atlantis Press
SP  - 1388
EP  - 1394
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceesd-18.2018.252
DO  - 10.2991/iceesd-18.2018.252
ID  - Nengzi2018/05
ER  -