EGSB反应器中SRB污泥颗粒化的工艺特性

Technological Characteristics of Sulfate-reducing Bacteria Sludge Granulation in Expanded Granular Sludge Blanket Reactor

利用厌氧膨胀颗粒污泥床(EGSB)反应器培养SRB颗粒污泥,探讨了EGSB反应器的运行效果以及SRB颗粒污泥的特性。结果表明,SRB颗粒污泥的形成提高了污泥的活性、VSS/SS和沉降性能;沿反应器高度方向的SO42-浓度逐渐降低;提高液体上升流速能促进泥水混合,有利于SO42-的还原及对COD的去除;而提高SO42-负荷则会降低对SO42-的去除率。

In a lab-scale experiment, SRB granular sludge was cultivated in the EGSB reactor. The operational efficiency of the EGSB reactor and the characteristics of SRB granular sludge were investigated. The results show that the sludge activity, VSS/SS and settleability are increased with the formation of SRB granular sludge. The concentration of SO4^2- is decreased along the height of the reactor. The increase of Vup can promote the mixing of sludge and water, SO4^2- reduction and COD removal. The increasing of SO4^2- loading rate can decrease its removal rate.