Enhanced simultaneous organics and nutrients removal in tidal flow constructed wetland using activated alumina as substrate treating domestic wastewater

Xu Tan; Yanling Yang; Yongwang Liu; Xing Li; Xiaoyan Fan; Zhiwei Zhou; Changjian Liu; Wenchao Yin

doi:10.1016/j.biortech.2019.02.036

Enhanced simultaneous organics and nutrients removal in tidal flow constructed wetland using activated alumina as substrate treating domestic wastewater

Bioresour Technol. 2019 May:280:441-446. doi: 10.1016/j.biortech.2019.02.036. Epub 2019 Feb 7.

Authors

Xu Tan¹, Yanling Yang², Yongwang Liu³, Xing Li⁴, Xiaoyan Fan¹, Zhiwei Zhou¹, Changjian Liu¹, Wenchao Yin⁵

Affiliations

¹ College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, PR China.
² College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, PR China. Electronic address: [email protected].
³ College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, PR China; China Architecture Design & Research Group, Beijing 100044, China. Electronic address: [email protected].
⁴ College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, PR China. Electronic address: [email protected].
⁵ China Architecture Design & Research Group, Beijing 100044, China. Electronic address: [email protected].

PMID: 30802748
DOI: 10.1016/j.biortech.2019.02.036

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 m³/(m²·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.

Keywords: Activated alumina; Domestic wastewater; Microbial community structure; Substrate; Tidal flow constructed wetland.

MeSH terms

Aluminum Oxide / chemistry*
Bacteria / metabolism
Biofilms
Denitrification
Nitrogen / isolation & purification
Nutrients*
Phosphorus / isolation & purification
Waste Disposal, Fluid / methods
Wastewater / chemistry*
Wetlands*

Substances

Waste Water
Phosphorus
Aluminum Oxide
Nitrogen