A high-rate and stable nitrogen removal from reject water in a full-scale two-stage AMX(R) system
- Authors
- Jung, Minki; Oh, Taeseok; Rhu, Daehwan; Liberzon, Jon; Kang, S. Joh; Daigger, Glen T.; Kim, Sungpyo
- Issue Date
- 1-2월-2021
- Publisher
- IWA PUBLISHING
- Keywords
- air-lift granulation reactor; anaerobic ammonium oxidation; high nitrogen loading rate; reject water; side-stream treatment; two-stage AMX(& #174); system
- Citation
- WATER SCIENCE AND TECHNOLOGY, v.83, no.3, pp.652 - 663
- Indexed
- SCIE
SCOPUS
- Journal Title
- WATER SCIENCE AND TECHNOLOGY
- Volume
- 83
- Number
- 3
- Start Page
- 652
- End Page
- 663
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/129238
- DOI
- 10.2166/wst.2021.002
- ISSN
- 0273-1223
- Abstract
- This paper reports long-term performance of a two-stage AMX(R) system with a capacity of 70 m(3)/d treating actual reject water. An air-lift granulation reactor performed partial nitritation (PN-AGR) at an average nitrogen loading rate (NLR) of 3.1 kgN/m(3)-d, producing an average effluent NO2--N/NH4+-N ratio of 1.04. The average nitrogen removal rate of the system was 3.91 kgN/m(3)-d following an anaerobic ammonium oxidation (Anammox) stage moving bed biofilm reactor (A-MBBR). Although the total nitrogen concentrations in the reject water fluctuated seasonally, overall nitrogen removal efficiency (NRE) of the two-stage AMX(R) system was very stable at over 87%. The two-stage AMX(R) system, consisting of a PN-AGR followed by an A-MBBR, operated at a stable NLR of 1.86 kgN/m(3)-d (1.64 kgN/m(3)-d including the intermediate tank), which is 1.8 times higher (1.6 times including the intermediate tank) than other commercialized single-stage partial nitritation/Anammox (PN/A) processes (which operate at a NLR of about 1 kgN/m(3)-d). The PN-AGR was affected by high influent total suspended solids (TSS) loads, but was able to recover within a short period of 4 days, which confirmed that the two-stage PN/A process is resilient to TSS load fluctuations.
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Collections - Graduate School > Department of Environmental Engineering > 1. Journal Articles
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