**5. Conclusions**

This paper comprehensively describes the effects of operating parameters on the inhibition of NOB in municipal wastewater treatment, implications of reactor configuration and operation, and focuses on the discussion of fixed film processes versus suspended growth systems. A mixed urban sewage continuous flow PN/A process based on Anammox granular sludge is proposed. This process seems to have many advantages in theory, and it will be validated in experiments next.

## **Acknowledgements**

This work was supported by China Postdoctoral Science Foundation (2022M720330) and Beijing Outstanding Young Scientist Program (BJJWZYJH01201910005019).

## **Conflict of interest**

The authors declare no conflict of interest.

*Research on Partial Nitritation and Anaerobic Ammonium Oxidation Process DOI: http://dx.doi.org/10.5772/intechopen.112708*
