Effects of electroconductive materials on treatment performance and microbial community structure in biofilter systems with silicone tubings

Jingjing Du; Yulong Niu; Haiming Wu; Dennis Konnerup; Shubiao Wu; Carlos A Ramírez-Vargas; Yanqin Yang; Hans Brix; Carlos A Arias

doi:10.1016/j.chemosphere.2022.135828

Effects of electroconductive materials on treatment performance and microbial community structure in biofilter systems with silicone tubings

Chemosphere. 2022 Nov;307(Pt 2):135828. doi: 10.1016/j.chemosphere.2022.135828. Epub 2022 Aug 6.

Authors

Jingjing Du¹, Yulong Niu², Haiming Wu³, Dennis Konnerup⁴, Shubiao Wu⁵, Carlos A Ramírez-Vargas⁶, Yanqin Yang⁷, Hans Brix⁶, Carlos A Arias⁶

Affiliations

¹ School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Department of Biology, Aarhus University, Aarhus, Denmark; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan Province, China. Electronic address: Dujj@zzuli.edu.cn.
² School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China.
³ Department of Biology, Aarhus University, Aarhus, Denmark; School of Environmental Science & Engineering, Shandong University, Qingdao, China.
⁴ Department of Food Science, Aarhus University, Aarhus, Denmark.
⁵ Department of Agroecology, Aarhus University, Tjele, Denmark.
⁶ Department of Biology, Aarhus University, Aarhus, Denmark; Aarhus University Centre for Water Technology (WATEC), Aarhus University, Aarhus, Denmark.
⁷ School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan Province, China.

PMID: 35944690
DOI: 10.1016/j.chemosphere.2022.135828

Abstract

Biofilter systems coupling with microbial electrochemical technology can enhance the removal performance of pollutants. In this study, two types of coke (PK-A and PK-LSN) were used as electroconductive substrates in biofilter systems with silicone tubings. The results showed that the silicone tubings were beneficial for removing NH₄⁺-N. The PK-A systems reached removal efficiencies up to 83.5-85.3% for NH₄⁺-N without aeration. Compared to gravel systems, significantly higher removal efficiencies of NO₃^--N (84.8-95.4%) were obtained in coke systems, and better removal of PO₄^3--P (91.9-95.7%) was also simultaneously achieved in PK-A systems. Redundancy analysis (RDA) indicated that the better performances of coke systems rely on the functions of both electroactive (Trichococcus and Sulfurovum) and non-electroactive bacteria (Clostridium_sensu_stricto_1, Propionicicella, and Acinetobacter). These findings highlight the important contribution of silicone tubings to oxygen supply and provide useful guidance for the application of coke in composite matrix systems.

Keywords: Bacterial community; Biofilter system; Microbial electrochemical technology; Removal efficiency; Silicone tubings.

MeSH terms

Coke*
Environmental Pollutants*
Microbiota*
Nitrogen
Oxygen
Silicones

Substances

Coke
Environmental Pollutants
Silicones
Nitrogen
Oxygen