【摘要】 以硫铝酸盐水泥为粘接剂,粉煤灰,凹凸棒以及活性炭为原料,水洗高岭土为填充剂,制备免烧陶粒。通过单因素分析和正交试验,确定了免烧陶粒的最佳配方为40%的硫铝酸盐水泥,15%的粉煤灰,2%的凹凸棒,3%的活性炭和40%的高岭土,免烧陶粒最佳配方性能指标为筒压强度2.41 MPa,软化系数为80.08%,空隙率为41.48%,比表面积为28.70 m²/g。按最佳配方加入菌液进行造粒,制备免烧生物活性陶粒,菌种固载于填料内部。将免烧生物活性陶粒和传统陶粒在农药废水的BAF系统进行对比实验。结果表明:pH值为7,添加量为40%的条件下,相对于传统免烧陶粒挂膜的COD和NH₃-N的去除率高出8.83%和12.22%。更多还原

【Abstract】 In this experimental study, non-burning ceramsite was prepared by using sulphoaluminate cement as binder, fly ash,attapulgite and activated carbon as raw materials and washed kaolin as filler. Through single factor analysis and orthogonal test,the best formula of unfired ceramsite was determined as 40% sulphoaluminate cement, 15% fly ash, 2% attapulgite, 3%activated carbon and 40% kaolin. The best formulation performance index of unfired ceramsite was 2. 41 MPa, softening coefficient 80. 08%, porosity 41. 48%, specific surface area 28. 70m~2/g. According to the best formula, the bacteria solution was added for granulation to prepare non-burning bioactive ceramsite, and the strain was immobilized inside the filler. A comparative experiment was carried out between non-burning bioactive ceramsite and traditional ceramsite in the BAF system of pesticide wastewater. The experimental results show that under the condition of pH 7 and 40% addition, the removal rate of COD and ammonia nitrogen is 8. 83% and 12. 22% higher than that of traditional non-fired ceramsite biofilm.更多还原