固定化微生物处理甲醇废水的包埋条件优化选择

Conditions of Imbedded Immobilization for the Treatment of Methanol Wastewater by Immobilized Microorganism

实验选取高浓度的甲醇废水,利用固定化包埋技术对甲醇废水进行污染物降解处理实验研究.分别以海藻酸钠和聚乙烯醇(PVA)为包埋材料,包埋驯化后的活性污泥,制成固定化小球颗粒,对甲醇废水中COD的降解为指标进行了正交试验.确定出海藻酸钠和聚乙烯醇的最佳包埋条件,并对在最佳包埋条件下制成的固定化小球进行了性能的改进.同时通过对固定化颗粒小球的比表面积、传质性能的测定以及电镜扫描分析了固定化小球的性能.实验表明,交联时间是固定化颗粒活性的主要影响因素;2种材料均有适合微生物附着生长的网状结构;加入添加剂后,PVA固定化小球的机械性能进一步得到改善.

Methanol-concentrated wastewater is chosen to optimize the conditions of imbedded immobilization of microorganisms through a series of experiments. Activated sludge is imbedded in some little balls with the imbedding materials of Sodium Alginate and PVA, then orthogonal experiments of methanol wastewater treatments are done based on the decomposition of the indicator of COD. Whereafter, the optimum imbedding conditions of Sodium Alginate and PVA are determined and the performance of immobilized ball is improved under those conditions. Meanwhile, the study analyses the performance of the ball based on such parameters as the specific surface area, penetrability and electronic-microscope photo. It is concluded that reaction time is the most important factor, both SA and PVA are reticulations and their structures are suitable to grow for microorganisms, and the mechanical performance of the PVA immobilized ball is improved to a large scale after adding some chemicals.