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A microbial flora with superior pollutant removal efficiency and its fermentation process optimization.

Yonghong Li1,2, Xiuxiu Wu1, Yun Wang1

  • 1School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China.

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Summary
This summary is machine-generated.

This study developed an efficient microbial flora for wastewater treatment, significantly improving the removal of ammonia nitrogen, total nitrogen, total phosphorus, and chemical oxygen demand. The optimized flora demonstrates high pollutant degradation efficiency for practical applications.

Keywords:
Ammonia nitrogenChemical oxygen demandMicrobial floraPollutant degradationViable bacteria

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Area of Science:

  • Environmental Microbiology
  • Wastewater Treatment Technologies
  • Bioremediation

Background:

  • Microbial flora is essential for microorganism-enhanced technologies in pollutant degradation.
  • Efficient pollutant degradation and high viable counts of microbial agents are critical for practical wastewater treatment applications.
  • Existing microbial consortia may require optimization for enhanced sewage treatment capacity.

Purpose of the Study:

  • To screen and optimize an efficient pollutant-degrading microbial flora for wastewater treatment.
  • To determine optimal medium components and culture conditions for maximizing microbial viable counts and degradation efficiency.
  • To verify the effectiveness of the optimized microbial flora in a zeolite trickling filter system.

Main Methods:

  • Screening of efficient pollutant-degrading microbial flora.
  • Optimization of medium components and culture conditions.
  • Verification of degradation efficiency in zeolite trickling filter towers, including analysis of microbial community composition.

Main Results:

  • Optimized culture conditions yielded a viable count of 4.76 × 10^9 cfu/mL with significant degradation rates for ammonia nitrogen (93.5%), nitrate nitrogen (100%), total nitrogen (68.3%), total phosphorus (32.6%), and chemical oxygen demand (85%).
  • Optimized feeding strategy increased viable bacteria to 5.80 × 10^9 cfu/mL.
  • In application tests, the experimental group showed significantly improved degradation rates: ammonia nitrogen (96.69%), total nitrogen (75.18%), total phosphorus (73.82%), and chemical oxygen demand (90.83%) compared to the control group. Key bacteria like Proteocatella, Dechlomonas, and Nitrospira were identified as crucial for enhanced nitrogen and phosphorus removal.

Conclusions:

  • The optimized microbial flora demonstrates high efficiency in degrading key pollutants (ammonia nitrogen, total nitrogen, total phosphorus, chemical oxygen demand) in wastewater.
  • The identified microbial community, including Proteocatella, Dechlomonas, and Nitrospira, is effective for nitrogen and phosphorus removal.
  • This study presents a cost-effective and highly efficient microbial solution for advanced sewage treatment.