[Community Distribution of the Rhizospheric and Endophytic Bacteria of and Their Limiting Factors in Iron Tailings].

The composition of the rhizospheric and endophytic bacteria in spring and summer around the Qiananling iron tailings reservoir in the Huairou District of Beijing was studied using Illumina high-throughput sequencing technology. Sequencing identified 40 phyla, and Proteobateria and Actinobacteria were the dominant phyla in all samples, accounting for more than 80% of the sequences in all samples. At the genus level, was dominant.

[Impact of Starvation Conditions on Biological Community Structure in Sulfur Autotrophic Denitrification Reactor].

Sulfur/dolomite and pyrite/dolomite autotrophic denitrification reactors were applied to treat the secondary effluent of wastewater treatment plant to explore the removal effect, the changes of microbial community, and recovery time of reactors after starvation period. It was shown in the results that after 30 d non-water starvation endurance, the effluent concentrations of NO-N in sulfur/dolomite and pyrite/dolomite reactors increased from 1.78 mg·L, 11.