Medium optimization and dust suppression performance analysis of microbial-based dust suppressant compound by response surface curve method

At present, microbial dust suppressants based on microbial communities lack necessary systematic analysis of factors affecting dust suppression performance. Therefore, in this study, the response surface curve method was used to optimize the culture conditions for enrichment of urease-producing microorganisms from activated sludge. The results indicated that when urea = 9.67 g L−1, NH4Cl = 5.21 g L−1, and pH = 9.57, the maximum urease activity of urease-producing microbial community (UPMC) was 8.22 mM min−1. The UPMC under optimized culture conditions reached a mineralization rate of 98.8