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Updated: Oct 16, 2025

Waste Water Derived Electroactive Microbial Biofilms: Growth, Maintenance, and Basic Characterization

Waste Water Derived Electroactive Microbial Biofilms: Growth, Maintenance, and Basic Characterization

Published on: December 29, 2013

Electrical selection for planktonic sludge microbial community function and assembly.

Aijie Wang¹, Ke Shi², Daliang Ning³

¹State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China.

|October 15, 2021

Summary

This summary is machine-generated.

Electrostimulated hydrolysis acidification (eHA) enhances industrial wastewater treatment by enriching specific microbes for azo dye degradation. Electrostimulation alters microbial community assembly and interactions, improving wastewater biotransformation efficiency.

Keywords:

Azo dye biotransformation Electroselection Hydrolysis acidification (HA)Microbial community assembly Microbial interaction Planktonic sludge microbial community

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Published on: December 25, 2015

Area of Science:

Environmental microbiology
Biotechnology
Wastewater treatment

Background:

Refractory industrial wastewater treatment often employs biological methods like hydrolysis acidification (HA).
Electrostimulated hydrolysis acidification (eHA) shows promise, but its impact on anaerobic sludge microbial communities is unclear.
Understanding microbial community dynamics is crucial for optimizing eHA processes.

Purpose of the Study:

To investigate the effects of electrostimulation on the structure, function, and assembly of planktonic anaerobic sludge microbial communities.
To compare microbial communities in eHA reactors with conventional HA reactors.
To elucidate the mechanisms by which electrostimulation enhances azo dye biotransformation.

Main Methods:

16S rRNA gene sequencing and metagenomic sequencing were used to analyze microbial communities.
Comparison of microbial community structure, composition, and function between eHA and HA reactors.
Analysis of microbial interactions and gene abundance related to dye degradation.

Main Results:

Electrostimulation significantly shifted microbial community structure and function, enriching for azo dye degraders (e.g., Acinetobacter, Dechloromonas) and electroactive bacteria (e.g., Pseudomonas).
eHA promoted more interactions between fermenters and decolorizing/electroactive bacteria, while reducing interactions among fermenters.
Increased abundance of genes for azo- and nitro-reductases and redox mediator biosynthesis was observed in eHA communities.
Microbial community assembly in eHA was more influenced by deterministic processes.

Conclusions:

Electrostimulation is a promising strategy for manipulating anaerobic sludge microbiomes in HA systems.
eHA enhances biotransformation of azo dyes by selecting for specific microbial taxa and functions.
This study provides insights into the microbial mechanisms underlying eHA efficiency in wastewater treatment.