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Abstract:
The completely autotrophic nitrogen removal over nitrite (CANON) process is an important component of energy self-sufficient sewage treatment plants, and the use of aerobic granular sludge is a profitable choice for the CANON process. In this study, the performance and microbial characteristics of CANON granular sludge were investigated for treating synthetic and mainstream domestic sewage. The average nitrogen removal rate (NRR) was 3.22 kg Nm(-3) d(-1) during the high-rate operating period with high MLSS (4.09 g L-1) and DO (similar to 1.0 mg L-1) for treating synthetic sewage. When the influent was mainstream sewage, the average NRR was 1.11 kg Nm(-3) d(-1). The effluent nitrate concentration was very low, and nitrate build-up was not found. High-throughput pyrosequencing results indicated that, Nitrosomonas and Candidatus Brocadia were the dominant genus in ammonia oxidizing bacteria (AOB) and anaerobic AOB (AAOB), respectively. The proportions of AOB and AAOB decreased during mainstream sewage treatment, but the reactor maintained good performance. The results confirmed the feasibility of using CANON granular sludge for treating mainstream sewage.
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Source :
CHEMICAL ENGINEERING JOURNAL
ISSN: 1385-8947
Year: 2018
Volume: 338
Page: 564-571
1 5 . 1 0 0
JCR@2022
ESI Discipline: ENGINEERING;
ESI HC Threshold:156
JCR Journal Grade:1
Cited Count:
WoS CC Cited Count: 30
SCOPUS Cited Count: 32
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2