吸铵饱和沸石的生物再生性能  

Performance of Biological Regeneration Capacity for Clinoptilolite with Ammonium-Saturated

作　　者：李云辉[1,2] 安莹[3] 

机构地区：[1]同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200092 [2]上海竹园第二污水处理厂,上海200137 [3]上海电力学院能源与环境工程学院,上海200090

出　　处：《净水技术》2013年第1期60-63,共4页Water Purification Technology

摘　　要：考察低浓度条件下制得的吸铵饱和沸石生物再生性能,探讨了不同污泥浓度和钠离子浓度条件下沸石的生物再生情况。结果表明,在一定的范围内,提高活性污泥浓度和适当添加钠离子有利于提高吸氨饱和沸石的再生速率。当MLVSS增加至2750 mg/L时,再生时间缩短至2.3 h。继续增加污泥浓度和提高钠离子含量,吸氨饱和沸石的再生效果反而下降。通过对比试验结果的关联性分析,认为在污泥浓度较高的条件下,沸石中铵离子的解吸速率是沸石生物再生的限制步骤。By investigating the regeneration capacity of clinoptilolite with ammonium-saturated, biological regeneration of clinop- tilolite with different concentration of sludge and sodium ion was discussed. Result showes, increasing the activated sludge concentra- tion and adding proper sodium ion can help speeding the regeneration rate of clinoptilolite with ammonium-saturated in a certain range. The regeneration time can be decreased to 2.3 h when increasing MLVSS to 2750 mg/L. But the regeneration rate is lower if continuing increasing the activated sludge concentration and sodium ion concentration. By relativity analysising the experiment results, it is found that desorption rate of ammonium in clinoptilolite is the limiting step of the ammonium-saturated clinoptilolite biological regeneration at high activated sludge concentration.

关 键 词：沸石 氨氮去除 生物再生 

分 类 号：X703.1[环境科学与工程—环境工程]