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Medium optimization and dust suppression performance analysis of microbial-based dust suppressant compound by
Xiangming Hu1,2, Zhiyuan Yang1, Yanyun Zhao1
1College of Safety and Environmental Engineering, Shandong University of Science and Technology, 579 Qianwangang Road, Qingdao, 266590, Shandong Province, China.
Summary
Optimized microbial conditions enhance urease activity for effective dust suppression. This microbial dust suppressant shows high mineralization rates and low pathogenicity, ensuring safe application.
Area of Science:
- Environmental Microbiology
- Biotechnology
- Soil Science
Background:
- Microbial dust suppressants require systematic analysis of factors influencing performance.
- Urease-producing microbial communities (UPMC) are key to biological dust suppression via ureolysis.
Purpose of the Study:
- Optimize culture conditions for UPMC enrichment.
- Evaluate the dust suppression performance of the optimized UPMC.
- Analyze the microbial community structure and safety of the suppressant.
Main Methods:
- Response surface methodology was employed to optimize culture conditions.
- Urease activity and mineralization rates were measured.
- Microbial community structure was analyzed using 16S rRNA gene sequencing.
Main Results:
- Optimal conditions (urea 9.67 g L⁻¹, NH₄Cl 5.21 g L⁻¹, pH 9.57) yielded maximum urease activity (8.22 mM min⁻¹).
- Optimized UPMC achieved a 98.8% mineralization rate on day 1.
- Sporosarcina sp. and Jeotgalicoccus sp. were abundant and crucial for urease stability.
Conclusions:
- Optimized UPMC demonstrates high dust suppression potential through ureolysis.
- The microbial dust suppressant exhibits favorable safety profiles with low pathogenicity.
- This study provides a systematic approach for developing effective microbial dust suppressants.
Keywords:
Medium optimizationMicrobial dust suppressantMicrobially induced carbonate precipitationResponse surface curveUrease-producing microbial community (UPMC)
