摘要
针对高含氮水体往往存在碳源不足,需要补充碳源的问题,以农林废弃物油菜秸秆作为外加碳源,对不同高含氮的水体进行了生物反硝化脱氮实验研究。结果表明,油菜秸秆在NO_3^--N含量相对较低的水体情况下脱氮效果较好,可以作为良好的缓释碳源,当NO_3^--N的质量浓度为20 mg/L时,脱氮效果最好,NO_3^--N负荷为31 mg/(L·d);当NO_3^--N的质量浓度大于30 mg/L时,因秸秆释碳不足,NO_3^--N去除率减小。不同浓度NO_3^--N水体的NO_3^--N去除率差别较大,但脱氮负荷较为接近,说明高含量NO_3^--N水体的脱氮效果主要与秸秆释碳量有关,受碳源影响。
Aimed at the carbon source of water with high nitrogen concentration is often insufficient so that exogenous carbon source is required. The biological denitrification of water bodies with different high nitrogen content was studied in this experiment, and agricultural wastes, rape straws was added as carbon source. The results showed that the rape straw could be ideal sustainably releasing carbon resource when the NO3--N content was relatively low,which obtained the highest NO3--N removal rates, when mass concentration of NO3--N was 20 mg/L, and the NO3--N load was 31 mg/(L·d). When mass concentration of NO3--N was higher than 30 mg/L, NO3--N removal rates decreased because of the insufficient carbon resource. Though the NO3--N removal rates were larger difference when NO3--N concentrations were different, but denitrifying loads were close, which meant the denitrification effect of water bodies containing high NO3--N content was mainly related to the carbon emission capacity of straw and was controlled by carbon resource.
作者
韩恺忻
邹小林
宋堋嘉
李焕运
李恒奕
李乃稳
HAN Kaixin;ZOU Xiaolin;SONG Pengjia;LI Huanyun;LI Hengyi;LI Naiwen(College of Hydraulic & Hydroelectric Engineering,Sichuan University,Chengdu 610065,China;State Key Lab of Hydraulics and Mountain River Eng,Sichuan University,Chengdu 610065,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2019年第2期105-110,共6页
Technology of Water Treatment
基金
四川省科技支撑计划项目(2016FZ0111 182DYF1851)
四川省省级大学生创新创业训练计划项目(201710611167)
关键词
油菜秸秆
缓释碳源
硝态氮
生物脱氮
rape straw
sustainably releasing carbon resource
nitrate nitrogen
biological denitrification
