Effects of Air on Microbial Community and Tailing Wastewater Remediation in Reducing Bacteria Remediation Process

Abstract

To research the effects of air on tailing wastewater remediation and microbial community in reducing bacteria remediation process, the experiments of air utilization were conducted. The physiochemical properties were determined using ICP, XRD, and microbial community structure was investigated by MiSeq high throughput sequencing. The results indicated air had no effect on redox potential, but the differences of pH, the concentration of dissolved sulfur and dissolved iron were obvious (p<0.05). The concentration of dissolved sulfur increased and pH lowered in Air+ group. In Air+ group, the oxidizing of sulfur and reducing of sulfate present simultaneously; however, the oxidizing of sulfur was stranger than the reducing of sulfate. Sulfur-/iron-oxidizing bacteria and sulfate-/iron-reducing bacteria present simultaneously in both Air- group and Air+ group, but only the present of sulfate-/ironreducing bacteria are not enough and the anaerobic environment is very important for remediation of tailing wastewater.