Sequential hydrotalcite precipitation, microbial sulfate reduction and in situ hydrogen sulfide removal process for neutral mine drainage treatment

The microbial communities in this submission are related to a three-stage sequential process for treating neutral mine drainage (NMD) generated from an open pit gold mine in Australia. The process consisted of a hydrotalcite (HT) chemical precipitation step (Stage 1); a low-cost organic carbon substrate (mixture of a native wetland plant - Typha spp. residue, and a locally-sourced Eucalyptus woodchip)-driven microbial sulfate reduction step (Stage 2); and a final in-situ sulfide removal step with a permeable iron (Fe)-rich ferrosol soil matrix (Stage 3). The process was designed and operated with hydraulic settings emulating a constructed wetland (CW) system to be deployed at the mine site.

本数据集所涉及的微生物群落，与澳大利亚某露天金矿产生的中性矿山排水（neutral mine drainage, NMD）的三级序批处理工艺相关。该工艺包含三个阶段：第一阶段为水滑石（hydrotalcite, HT）化学沉淀工序；第二阶段为以低成本有机碳基质驱动的微生物硫酸盐还原工序，该基质由本土湿地植物香蒲属（Typha spp.）残体与本地采购的桉木片混合而成；第三阶段为采用富铁渗透性铁铝土（ferrosol）土壤基质的原位硫化物去除工序。本工艺的水力设计与运行参数仿照拟部署于该金矿场地的人工湿地（constructed wetland, CW）系统进行设置。