Improving wastewater management using free nitrous acid (FNA)

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Haoran Duan
  • Shuhong Gao
  • Xuan Li
  • Nur Hafizah Ab Hamid
  • Guangming Jiang
  • Min Zheng
  • Xue Bai
  • Philip L. Bond
  • Xuanyu Lu
  • Mariella M. Chislett
  • Shihu Hu
  • Liu Ye

Detail(s)

Original languageEnglish
Article number115382
Journal / PublicationWater Research
Volume171
Online published11 Dec 2019
Publication statusPublished - 15 Mar 2020
Externally publishedYes

Abstract

Free nitrous acid (FNA), the protonated form of nitrite, has historically been an unwanted substance in wastewater systems due to its inhibition on a wide range of microorganisms. However, in recent years, advanced understanding of FNA inhibitory and biocidal effects on microorganisms has led to the development of a series of FNA-based applications that improve wastewater management practices. FNA has been used in sewer systems to control sewer corrosion and odor; in wastewater treatment to achieve carbon and energy efficient nitrogen removal; in sludge management to improve the sludge reduction and energy recovery; in membrane systems to address membrane fouling; and in wastewater algae systems to facilitate algae harvesting. This paper aims to comprehensively and critically review the current status of FNA-based applications in improving wastewater management. The underlying mechanisms of FNA inhibitory and biocidal effects are also reviewed and discussed. Knowledge gaps and current limitations of the FNA-based applications are identified; and perspectives on the development of FNA-based applications are discussed. We conclude that the FNA-based technologies have great potential for enhancing the performance of wastewater systems; however, further development and demonstration at larger scales are still required for their wider applications. © 2019 Elsevier Ltd.

Research Area(s)

  • Algae, Free nitrous acid, Membrane fouling, Sewer, Sludge management, Wastewater treatment

Citation Format(s)

Improving wastewater management using free nitrous acid (FNA). / Duan, Haoran; Gao, Shuhong; Li, Xuan et al.
In: Water Research, Vol. 171, 115382, 15.03.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review