Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4998035 | Bioresource Technology | 2016 | 10 Pages |
â¢A novel ANAMMOX-PD process was successful applied for advanced nitrogen removal.â¢The effluent NO3â-N was below 20 mg/L with NRE of 97.3% under influent TN of 840 mg/L.â¢Domestic wastewater was treated simultaneously with NRE of 96.7%.â¢Partial denitrification was achieved stably with NTR approximately 80%.â¢Microbial community in ANAMMOX reactor was analyzed via high-throughput sequencing.
In this study, a novel integrated anaerobic ammonium oxidization with partial denitrification process (termed as ANAMMOX-PD) was developed for advanced nitrogen removal from high-strength wastewater, which excess NO3â-N produced by ANAMMOX was fed into PD reactor for NO2â-N production and then refluxing to ANAMMOX reactor for further removal. Results showed that total nitrogen (TN) removal efficiency as high as 97.8% was achieved and effluent TN-N was below 20Â mg/L at influent TN-N of 820Â mg/L. Furthermore, the feasibility of simultaneously treating domestic wastewater was demonstrated in ANAMMOX-PD process, and NH4+-N removal efficiency of 96.7% was obtained. The nitrogen removal was mainly carried out through ANAMMOX pathway, and high-throughput sequencing revealed that Candidatus_Brocadia was the major ANAMMOX species. The presented process could effectively solve the problem of excess nitrate residual in ANAMMOX effluent, which hold a great potential in application of currently ANAMMOX treating high-strength wastewater (e.g. sludge digestion supernatant).
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