摘要
碳源不足是河道水处理过程中制约生物脱氮的关键问题。试验选择芦苇、稻草、棕树纤维、木屑、玉米芯、树皮、竹子、腐殖土8种常见天然有机物作为反硝化细菌碳源,研究不同碳源对NO3--N的降解特性。结果表明,芦苇和稻草对于NO3--N的吸附能力很强,但同时释放大量的NH4+-N,影响整体脱氮效率。相比之下,玉米芯和木屑在缺氧状态下的脱氮效果最好,脱氮率均在95%以上,且其氮磷的释放量很少。因此,综合各碳源的脱氮能力、氮磷释放潜能及吸附能力,木屑和玉米芯是河道水反硝化脱氮的最佳补充碳源。
In order to select appropriate natural carbon sources to solve the Nitrate-N pollution of riverway water, eight kinds of natural organic mattes were selected as carbon sources for denitrifying bacteria in this experiment. The results showed that corncob and sawdust had a better denitrification performance with less nutrient release amount. The phragrnites australis and rice straw had strong adsorbability of nitrate-N, but the phragmites australis and rice straw would release a large amount of ammonium-N. So, the denitrification rate of phragmites australis and rice straw were not better. Therefore, according to the nitrogen removal rate, ability of nutrient release and adsorbability, corncob and sawdust are considered as the best denitrification carbon sources.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第5期64-68,共5页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2012ZX07302-002)
陕西省自然基金(2012JQ7021)
陕西省科技统筹创新(2011KTZB-03-03-03)
陕西省教育厅项目(12JS050)
关键词
河道水
反硝化
碳源
riverway water
denitrification
carbon source
