An efficient process for wastewater treatment to mitigate free nitrous acid generation and its inhibition on biological phosphorus removal

Zhao, Jianwei, Wang, Dongbo, Li, Xiaoming, Yang, Qi, Chen, Hongbo, Zhong, Yu, An, Hongxue and Zeng, Guangming (2015) An efficient process for wastewater treatment to mitigate free nitrous acid generation and its inhibition on biological phosphorus removal. Scientific Reports, 5 Art No.: 8602: . doi:10.1038/srep08602

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Author Zhao, Jianwei
Wang, Dongbo
Li, Xiaoming
Yang, Qi
Chen, Hongbo
Zhong, Yu
An, Hongxue
Zeng, Guangming
Title An efficient process for wastewater treatment to mitigate free nitrous acid generation and its inhibition on biological phosphorus removal
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2015
Year available 2015
Sub-type Article (original research)
DOI 10.1038/srep08602
Open Access Status DOI
Volume 5
Issue Art No.: 8602
Total pages 8
Place of publication London United Kingdom
Publisher Nature Publishing Group
Collection year 2016
Language eng
Formatted abstract
Free nitrous acid (FNA), which is the protonated form of nitrite and inevitably produced during biological nitrogen removal, has been demonstrated to strongly inhibit the activity of polyphosphate accumulating organisms (PAOs). Herein we reported an efficient process for wastewater treatment, i.e., the oxic/anoxic/oxic/extended-idle process to mitigate the generation of FNA and its inhibition on PAOs. The results showed that this new process enriched more PAOs which thereby achieved higher phosphorus removal efficiency than the conventional four-step (i.e., anaerobic/oxic/anoxic/oxic) biological nutrient removal process (41 ± 7% versus 30 ± 5% in abundance of PAOs and 97 ± 0.73% versus 82 ± 1.2% in efficiency of phosphorus removal). It was found that this new process increased pH value but decreased nitrite accumulation, resulting in the decreased FNA generation. Further experiments showed that the new process could alleviate the inhibition of FNA on the metabolisms of PAOs even under the same FNA concentration.
Keyword Biological techniques
Environmental Sciences
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
Advanced Water Management Centre Publications
 
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