Advanced treatment of effluent from municipal wastewater treatment plant by strengthened ecological floating bed

Zijin Huang; Fanlong Kong; Yue Li; Guangming Xu; Ruoyu Yuan; Sen Wang

doi:10.1016/j.biortech.2020.123358

Advanced treatment of effluent from municipal wastewater treatment plant by strengthened ecological floating bed

Bioresour Technol. 2020 Aug:309:123358. doi: 10.1016/j.biortech.2020.123358. Epub 2020 Apr 13.

Authors

Zijin Huang¹, Fanlong Kong¹, Yue Li¹, Guangming Xu¹, Ruoyu Yuan¹, Sen Wang²

Affiliations

¹ College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
² College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China. Electronic address: wangsen@qdu.edu.cn.

PMID: 32315916
DOI: 10.1016/j.biortech.2020.123358

Abstract

The performance of eological floating bed (EFB) with novel carbon source (CS) and reed biochar substrate (RBS) derived from reed straw (RS) was evaluated for the advanced treatment of effluent from wastewater treatment plants (WWTPs). The average carbon releasing capacity of CS was 4.50 mg/g, and the P adsorption capacity of RBS was 0.39 mg/g. The additional CS and RBS increased the average removal efficiencies of total nitrogen (TN) and total phosphorus (TP) by 57.6% and 46.7%, respectively. Furthermore, the high-throughput sequencing results revealed significantly different microbial species richness and diversity due to the CS and RBS. Some genera related to nitrogen removal, such as Pseudomonas, Rhodobacter, Hydrogenophaga, Bradyrhizobium, Acinetobacter and Thiobacillus, were enriched in the EFB with CS and RBS. This study provided a suitable method for effectively treating low C/N wastewater such as WWTPs effluent using EFB strengthened by processed wetland plant.

Keywords: Advanced treatment; Biochar; Carbon source; Ecological floating bed; Microbial community.

MeSH terms

Carbon
Nitrogen
Phosphorus*
Waste Disposal, Fluid
Wastewater*
Wetlands

Substances

Waste Water
Phosphorus
Carbon
Nitrogen