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

被引：2

作者：

Wang, Yu ^{[1
,2
,3
]}

Zhu, Yan ^{[3
,5
]}

Sun, Pengfei ^{[3
]}

Liu, Junzhuo ^{[3
]}

Zhu, Ningyuan ^{[3
,5
]}

Tang, Jun ^{[3
]}

Wong, Po Keung ^{[4
]}

Fan, Hua ^{[1
,2
]}

Wu, Yonghong ^{[3
]}

机构：

[1] Nanchang Univ, Sch Resources Environm & Chem Engn, Nanchang, Jiangxi, Peoples R China

[2] Nanchang Univ, Key Lab Poyang Lake Environm & Resource Utilizat, Nanchang, Jiangxi, Peoples R China

[3] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Zigui Ecol Stn Three Gorges Dam Project, 71 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China

[4] Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China

[5] Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2019年 / 274卷

基金：

中国国家自然科学基金;

关键词：

Periphytic biofilm; Upconversion luminescence; Microbial aggregates; Nitrogen removal; Microbial community structure; ESCHERICHIA-COLI; UV; INACTIVATION; LUMINESCENCE; BACTERIAL; DISINFECTION; NANOCRYSTALS; MICROORGANISM; NANOPARTICLES; ENHANCEMENT;

D O I：

10.1016/j.biortech.2018.11.079

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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.

引用

页码：105 / 112

页数：8