Performance of bio-nest by modified basalt fiber carriers on the enhanced remediation of low-carbon and -nitrogen urban black-smelling water

Author:

He Kai123ORCID,Yuan Jinlong123,Qi Xiaoyuan4,Yu Haixia2,Lu Haoxian5,Yin Qidong23ORCID,Zhang Suo6,Liu Bingjun2

Affiliation:

1. a Key Laboratory of Water Security Guarantee in Guangdong-Hong Kong-Marco Greater Bay Area of Ministry of Water Resources, Guangzhou 510611, China

2. b School of Civil Engineering, Sun Yat-Sen University, Zhuhai 519082, China

3. c Guangdong Provincial Key Laboratory for Marine Civil Engineering, Zhuhai 519082, China

4. d Zhuhai Water Resources Center, Zhuhai 519000, China

5. e Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China

6. f Shanghai Municipal Engineering Design Institute (Group) Co., Ltd, Tianjin Branchi, Tianjin 300220, China

Abstract

ABSTRACT Biological contact oxidation reactors employing modified basalt fiber (MBF) were constructed to systematically investigate the impact of various hydraulic retention times (HRTs) and aeration durations on nitrogen and phosphorus removal in low carbon and polluted river water. The experimental findings underscored that configuring the HRT to 36 h and maintaining an aeration ratio of 1:2 yielded the most favorable outcomes for the removal of chemical oxygen demand, NH4+ -N, total nitrogen (TN), and TP from synthetic low carbon, source-polluted river water. Detailed microbial sequencing elucidated the predominant bacterial phylum within the MBF reactor, identified as Proteobacteria. The dominant genera encompassed Pseudomonas, Aeromonas, and SM1A02. This microbial composition, marked by a high abundance of denitrifying genera, corroborated the robust denitrification capacity exhibited by the MBF reactors. The orchestrated combination of optimal operational parameters and the prevalence of key microbial taxa substantiate the efficiency of MBF reactors in effectively mitigating nitrogen and phosphorus in low carbon source river water.

Funder

the Open Research Fund of Key Laboratory of Water Security Guarantee in Guangdong-Hong Kong-Marco Greater Bay Area of Ministry of Water Resources

Foshan Shunde District Core Technology Breakthrough Project

2022 Zhuhai Social Development Science and Technology Program Project

Guangdong Basic and Applied Basic Research Foundation

Publisher

IWA Publishing

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