A MEMBRANE AERATED BIOFILM REACTOR (MABR) FOR SULFIDE CONTROL USING A BUBBLELESS MEMBRANE AERATION

A UASB reactor was operated combined to a membrane aerated biofilm reactor (MABR) for sulfate removal and for elemental sulfur reclamation. A commercial silicon tube was use as an oxygen delivery diffuser. The process achieved high rates of sulfide removal from liquid phase (90%). The hydrogen sulfide removal was influenced by the pH value and at pH value of 7.5, 98% of the H2S was removed. The elemental sulfur was observed in inside the membrane, with content in the biomass of 21%. 16S rRNA gene-based high throughput Illumina MiSeq sequencing was used to demonstrate the microbial community diversity and the different layers inside the silicon tube.

本研究采用升流式厌氧污泥床反应器（Upflow Anaerobic Sludge Blanket, UASB）与膜曝气生物膜反应器（Membrane Aerated Biofilm Reactor, MABR）的组合工艺，用于硫酸盐去除与单质硫回收。实验采用商用硅管作为供氧扩散器。该工艺对液相中的硫化物具备极高的去除效率，去除率可达90%。硫化氢的去除效果受pH值调控显著：当pH值为7.5时，硫化氢去除率可达98%。研究在膜内部检测到单质硫，其在生物质中的含量占比为21%。本研究采用基于16S rRNA基因的高通量Illumina MiSeq测序技术，解析了硅管内部的微生物群落多样性及其分层结构。