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476W,微波作用时间9min,氯化钠质量浓度80g/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。
[Objective] This research focused on exploring the treatment of biogas slurry with zeolite modified by microwave and NaC1 under different modification conditions. [Method] In the batch experi- ment, biogas slurry was treated with zeolite modified by microwave and NaCI, natural zeolite was taken as the control. Based on removal rates of chemical oxygen demand（COD）, ammonia nitrogen（NHa-N）, and to- tal phosphorus（TP）, effects of microwave power,microwave activation time, NaC1 mass concentration, and temperature on the treatment of biogas slurry were investigated. [Result] The optimal conditions obtained were：microwave power was 476 W,mierowave activation time was 9 min,NaC1 mass concentration was 80 g/L,and temperature was 25 ℃. COD,NHa-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
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2014年第1期218-222,共5页
Journal of Northwest A&F University(Natural Science Edition)
基金
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)
关键词
沸石
改性
沼液
吸附处理
zeolite
modification
biogas slurry
adsorption treatment
