ABR硫酸盐还原体系矿化固定酸性矿山废水中重金属的调控及作用机制

ABR硫酸盐还原体系作为一种潜在的多金属离子矿化固定系统，其处理酸性矿山废水(AMD)中重金属转变成矿物的研究必将开辟一个崭新的废水生物处理研究和应用领域。根据前期研究，我们提出通过调控ABR硫酸盐还原体系可分级沉淀AMD中重金属并经SRB矿化作用形成微米级矿物的工作设想。为进一步证实该设想，我们拟建立ABR硫酸盐还原体系，以模拟AMD为进水，通过调控运行参数和反应器内部环境，为硫酸盐还原厌氧颗粒污泥提供最优的微生物矿化成矿条件，形成微米级矿物，以实现重金属的分离回收。并以硫酸盐还原厌氧颗粒污泥为研究核心，厘清SRB、EPS、金属硫化物、液相介质间的交互作用关系，揭示硫酸盐还原体系矿化固定重金属成矿的机制，集成多相分离硫酸盐还原体系矿化AMD成矿的技术。本研究将为AMD中重金属的资源化处理提供新的研究思路，也为生物成矿研究提供一个可调控的、动态的整体性体系。

As a potential multi-metallic ion mineralization and fixation system, the ABR sulfate reduction system will definitely open up a new field of biological treatment of wastewater by transforming heavy metals into minerals in acid mine wastewater (AMD). According to the previous studies, we hypothesized that heavy metals in AMD can be precipitated in stages and micron minerals can be formed by SRB mineralization through regulating the ABR sulfate reduction system. To further confirm this assumption, we propose to establish an ABR sulfate reduction system by using simulated AMD as the influent, and to provide optimal microbial mineralization conditions for sulfate-reducing anaerobic granular sludge to form micron minerals by regulating operating parameters and the internal environment of the reactor, to achieve the separation and the recovery of heavy metals. Taking sulfate-reduced anaerobic granular sludge as the core of the research, the interaction among SRB, EPS, metal sulfide and liquid media will be clarified, the mineralization mechanism of fixed heavy metals in the sulfate reduction system will be revealed, and the mineralization technology of forming minerals from heavy metals in AMD by a multi-phase separation sulfate reduction system will be integrated. This study will provide a new idea for the resource-based treatment of heavy metals in AMD, and a regulable and dynamic integrated system for the study of bio-mineralization as well.