Abstract：
:Benzethonium chloride (BZC) is an antibacterial compound with extensive applications in various anti-infective products. However, the feasibility of attaining partial nitrification of municipal wastewater using BZC has not been reported. In this work, BZC was used for the first time to attain partial nitrification. Batch experiments indicated nitrite oxidizing bacteria (NOB) was more vulnerable to BZC than ammonia oxidizing bacteria (AOB). When activated sludge was treated only once with 0.023 g BZC·(g MLSS)-1 for 18 h, partial nitrification was attained at the 29th cycle with NAR of 97.46% and sustained 91 cycles in stability tests. Complimentary DNA sequencing analysis revealed the suppression of Nitrospira was the reason for partial nitrification. Oligotyping analysis indicated AOB could likely resist to BZC by both the species shifts and development of tolerance, while most NOB species could not adapt to BZC. This study revealed the feasibility of BZC as a novel NOB inhibitor.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Cui Y,Gao J,Zhang D,Zhao Y,Wang Ydoi
10.1016/j.biortech.2020.123860subject
Has Abstractpub_date
2020-11-01 00:00:00pages
123860eissn
0960-8524issn
1873-2976pii
S0960-8524(20)31132-9journal_volume
315pub_type
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