Augmenting nitrogen removal by periphytic biofilm strengthened via upconversion phosphors (UCPs).

Abstract:

:The application of periphytic biofilm in removing nitrogen from water is limited by the fluctuating nitrogen concentration. Here, we delineate a novel approach to enhance periphytic biofilm performance in nitrogen removal via upconversion luminescence of upconversion phosphors (UCPs). Nitrogen removal rates (14 d) in high nitrogen wastewater (26 mg/L) were significantly improved to 58.6% and 61.4% by UCPs doped with Pr3+ and Li+ and UCPs doped with Pr3+, respectively, and to 95.1% and 95.9% in low nitrogen surface water (2 mg/L), respectively. The stimulation of UCPs optimized the microbial community structure in the periphytic biofilms, and also resulted in good acclimation to use different carbon sources. The enhanced synergic action of cyanobacterial biomass, ratio of Gram +ve to Gram -ve bacteria and carbon source metabolic capacity contributed to the improved nitrogen removal. This novel approach is promising in nitrogen removal from wastewater and surface water with fluctuating initial nitrogen concentration.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Wang Y,Zhu Y,Sun P,Liu J,Zhu N,Tang J,Wong PK,Fan H,Wu Y

doi

10.1016/j.biortech.2018.11.079

subject

Has Abstract

pub_date

2019-02-01 00:00:00

pages

105-112

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)31613-4

journal_volume

274

pub_type

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