Improving wastewater management using free nitrous acid (FNA)

WATER RESEARCH

卷:171

Review

Duan, Haoran^1,2  Gao, Shuhong³  Li, Xuan¹  Ab Hamid, Nur Hafizah²  Jiang, Guangming⁴  Zheng, Min¹  Bai, Xue¹  Bond, Philip L.¹  Lu, Xuanyu^1,2  Chislett, Mariella M.¹  Hu, Shihu¹  Ye, Liu²  Yuan, Zhiguo¹ 

[1] Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia

[2] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia

[3] Univ Oklahoma, Dept Microbiol & Plant Biol, Inst Environm Genom, Norman, OK 73019 USA

[4] Univ Wollongong, Sch Civil Min & Environm Engn, Wollongong, NSW 2522, Australia

关键词: Free nitrous acid;    Sewer;    Wastewater treatment;    Sludge management;    Membrane fouling;    Algae;   

DOI  :  10.1016/j.watres.2019.115382

来源: Elsevier

【 摘 要 】

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. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free