固定化活性污泥磁性微球的制备工艺研究

Discussion on Influential Factors of Preparation of Immobilized Activated Sludge Magnetic Pills

对固定化活性污泥磁性微球制备过程中的几个影响因素进行了探讨，得出的最佳条件是；8％的PVA，0．20％的藻酸钠组．成载体溶液，以1：1．25的比率与含3％的活性碳和1．3％的磁性Fe3O4的活性污泥混合，然后在含有CaCl2的饱和硼酸溶液中固化24h，再在NaH2PO4溶液中进一步固化，制得的固定化活性污泥磁性微球表现出较好的强度和COD降解率，为其在污水处理中的应用提供了依据。

The influential factors of preparation of immobilized activated sludge magnetic pills which is used in sewage treatment is discussed. The optimized conditions is 8 % PVA mixed with 0.20% sodium alginate, 1：1.25 ratio of carrier solution to activated sludge, 3% activated carbon and 1.3% magnetic Fe3O4 in activated sludge, immobilizing in saturated boric acid solution and 2 % CaCl2 solution for 24 hour, and dipping in 1mol/L NaH2PO4 solution. The immobilized activated sludge magnetic pills have better gel strength and degradation ratio of COD in magnetic field, which is groundwork of industrial application.