Purification effect and microbial community structure of bio filter on rural dispersed sewage

Songtao Shen; Junlong Meng; Tuodi Zhang; Chuanhui Zhou; Yingyi Xu

doi:10.1016/j.heliyon.2024.e25301

Purification effect and microbial community structure of bio filter on rural dispersed sewage

Heliyon. 2024 Jan 26;10(3):e25301. doi: 10.1016/j.heliyon.2024.e25301. eCollection 2024 Feb 15.

Authors

Songtao Shen¹, Junlong Meng¹, Tuodi Zhang¹, Chuanhui Zhou¹, Yingyi Xu²

Affiliations

¹ School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
² School of Culture and Education, Tianfu College of Southwestern University of Finance and Economics, Mianyang, 621010, China.

Abstract

Taking rural dispersed sewage for research objects, the treatment effect and microbial community structure characteristics of a bio filter (BF) reactor was studied. At fixed time and location, the removal efficiencies of common pollutants were investigated. By using high-throughput sequencing method, the heterogeneities of microbial community structure in fillers and plant roots were analyzed. The results showed that the average annual removal rates of COD_Cr, NH₃-N, TN, and TP by the BF were 83.10 %, 65.67 %, 60.25 %, and 80.32 % respectively, and the effluent could reach the first grade of the water pollutant discharge standard of rural sewage treatment facility (DB51/2626-2019). During the sewage treatment process, Scindapsus could effectively establish complex and stable microbial communities, and could better degrade pollutants, especially nitrogen removal. The dominant microbial communities were more than 11 phyla and 19 classes. At the genus level, the dominant bacteria included Nitrospira, Arthrobacter, Rhodoplanes, etc.

Keywords: Bio filter; Microbial community; Removal effect; Rural dispersed sewage; Sequencing.