| 摘要: |
| 【目的】研究不同改性条件对沸石吸附沼液效果的影响，为沼液的高效低耗处理提供理论依据。【方法】以化学需氧量（COD）、氨态氮（NH3-N）、总磷（TP）去除率为测定指标，以天然斜发沸石为对照，采用微波-氯化钠法改性沸石，研究微波功率、微波作用时间、氯化钠质量浓度、温度等改性条件对沸石处理沼液效果的影响。【结果】沸石最佳改性条件为：微波功率476 W，微波作用时间9 min，氯化钠质量浓度80 g/L，搅拌温度25 ℃。天然斜发沸石对沼液中COD、NH3-N、TP的去除率分别为14.96%，27.54%和18.27%，而在最佳条件下所得的改性沸石对沼液中COD、NH3-N、TP的去除率分别达到32.26%，89.05%，48.33%，明显高于天然斜发沸石。【结论】得到了沸石改性的最优条件，为改性沸石在沼液吸附处理中的应用奠定了基础。 |
| 关键词: 沸石 改性 沼液 吸附处理 |
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| 基金项目:国家“十一五”科技支撑计划项目（2010BAD03B03）；重庆市科技攻关重点项目 (CSTC2009AB7027) |
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| Treatment of biogas slurry with microwave NaCl modified zeolite |
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CHANG Chen,XING Ze,CHEN Yu-cheng
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| Abstract: |
| 【Objective】This research focused on exploring the treatment of biogas slurry with zeolite modified by microwave and NaCl under different modification conditions.【Method】In the batch experiment,biogas slurry was treated with zeolite modified by microwave and NaCl,natural zeolite was taken as the control.Based on removal rates of chemical oxygen demand(COD),ammonia nitrogen(NH3-N),and total phosphorus(TP),effects of microwave power,microwave activation time,NaCl mass concentration,and temperature on the treatment of biogas slurry were investigated.【Result】The optimal conditions obtained were:microwave power was 476 W,microwave activation time was 9 min,NaCl mass concentration was 80 g/L,and temperature was 25 ℃.COD,NH3-N,and TP removal rates with modified zeolite were 32.26%,89.05%,and 48.33%,respectively,which were much high than natural zeolite (14.96%,27.54%,and 18.27%).【Conclusion】This study obtained optimal conditions for zeolite modification,and establishes the foundation for the modified zeolite to the adsorption treatment of biogas slurry. |
| Key words: zeolite modification biogas slurry adsorption treatment |
