[Bacterial diversity in a sequencing batch reactor treating nitrogen-containing aromatic wastewater]

Area of Science:

• Environmental microbiology
• Biotechnology
• Wastewater treatment

Context:

• Nitrogen-containing aromatic compounds pose environmental challenges in wastewater.
• Sequencing batch reactors (SBRs) are employed for wastewater treatment.
• Understanding microbial communities is vital for optimizing SBR performance.

Purpose:

• To elucidate the microbial degradation mechanisms of nitrogen-containing aromatic compounds in an SBR.
• To identify key bacterial players involved in the biodegradation process.
• To analyze the functional genes responsible for aromatic compound breakdown.

Summary:

• PCR-DGGE analysis revealed shifts in bacterial diversity during SBR start-up.
• 36 out of 90 isolated strains demonstrated the ability to degrade nitrogen-containing aromatics.
• Actinobacteria, Acidobacteria, and beta-Proteobacteria were identified as potentially significant degraders.
• Aromatic ring cleavage dioxygenase analysis provided insights into degradation pathways.

Impact:

• Provides valuable insights into the microbiological degradation mechanisms in SBRs.
• Identifies and characterizes novel microbial resources for nitrogen-containing aromatic compound degradation.
• Contributes to the development of more efficient and sustainable wastewater treatment strategies.