复合沸石滤料的制备及其性能测试
Preparation and performance test of composite clinoptilolite filter materials
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摘要: 以活化后的天然斜发沸石为主要原料，添加粘合剂、成孔剂等制备出孔隙率高、比表面积大的球型复合沸石滤料。通过正交实验得到最优工艺组合条件为ω沸石粉∶ω粘合剂∶ω成孔剂=55%∶35%∶10%，活化温度为150℃，活化时间为3 h。制备的成品堆积密度为674 kg/m3，筒压强度为4.32 MPa，显气孔率59.02%。较陶粒相比，该滤料用于曝气生物滤池在挂膜启动与稳定运行阶段，均具有较高的氨氮去除效果，且挂膜微生物量高，更适宜作为曝气生物滤池的载体。Abstract: Spheroidal composite filter materials were prepared with activated clinoptilolite powder as the main component. The optimized composition of the filter materials determined by orthogonal test was ωclinoptilolite∶ωbond∶ωadditive=55%∶35%∶10% with activation temperature at 150℃ for 3 h. The piled density, cylinder pressure and apparent porosity of the composite filter materials were 674 kg/m3, 4.32 MPa and 59.02%,respectively. Compared with ceramsite, the composite filer materials had larger specific surface area, higher porosity，and higher ammonia nitrogen removal rate at start-up and steady operation stage, which could be well used in BAF.
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Key words:
- clinoptilolite /
- activation /
- composite filter materials
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