Enhanced simultaneous organics and nutrients removal in tidal flow constructed wetland using activated alumina as substrate treating domestic wastewater. (May 2019)

• Record Type: Journal Article
• Authors: Tan, Xu; Yang, Yanling; Liu, Yongwang; Li, Xing; Fan, Xiaoyan; Zhou, Zhiwei; Liu, Changjian; Yin, Wenchao
• Is Part Of: Bioresource technology. Volume 280(2019)
• Page Start: 441
• Page End: 446
• Publication Date: 2019-05
• Subjects: Tidal flow constructed wetland -- Domestic wastewater -- Substrate -- Activated alumina -- Microbial community structure; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.02.036
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Enhanced simultaneous long-term P and N removals in A-TFCW were achieved. Denitrifying bacteria in A-TFCW accounted for 45.19% higher than S-TFCW (22.14%). Novel AA substrate could be applied in TFCW for treatment of domestic wastewater. Abstract: A tidal flow constructed wetland (TFCW), a commonly applied system to clean wastewater, contains a substrate to assist pollutants removal, while the choice of substrate affects the formation of bacterial biofilms. Herein, activated alumina-TFCW (A-TFCW) with hydraulic load of 1.35 m 3 /(m 2 ·d) parallel with shale ceramisite (S-TFCW) was investigated for treating domestic wastewater, aiming to enhance simultaneous long-term removal of organics, nitrogen and phosphorus. A-TFCW achieved significantly higher COD, NH4 + -N, TN and TP removal efficiency than S-TFCW, with the removal efficiency of 85.9% COD, 85.4% NH4 + -N, 72.8% TN and 96.4% TP respectively. Denitrifying bacteria dominated in both formed biofilms, with higher relative abundance of nitrifying bacteria and denitrifying bacteria in A-TFCW. These results demonstrated that AA substrate was more suitable to be applied in enhancing the removal performance in TFCW for the treatment of domestic wastewater.