天然水体氮自净过程及硝化所需溶解氧源试验验证  

Experimental verifications of self-purification of nitrogen and dissolved oxygen sources for nitrification in natural water

作　　者：郝晓地[1] 陈新华 魏丽[1] 

机构地区：[1]北京建筑工程学院可持续环境生物技术研发中心,北京100044

出　　处：《水资源保护》2007年第5期11-14,90,共5页Water Resources Protection

基　　金：北京市可持续水与废物循环利用技术"学术创新团队"项目(BJE10016200611)

摘　　要：通过试验验证了天然水体中确实存在氮的自然净化过程和同步硝化/反硝化途径。在氮与有机物浓度较低时,遮光阻断藻类光合作用试验表明,大气复氧足以使试验水质条件下的氮和有机物完全氧化。然而,有机物过早消耗对硝化后产生的硝酸氮再行反硝化作用不利。反硝化反应彻底进行可以通过外加碳源方式实现。COD初始浓度较高会引起异养菌对氧的大量消耗,使本来数量就处于劣势的硝化细菌的硝化反应受阻。Self-purification processes of nitrogen and simultaneous nitrification and denitrification（SND） in natural water were simulated by experiment.Under low concentrations of nitrogen and organic matter,an experiment in dark environment without photosynthesis demonstrated that oxygen from atmospheric reaeration was abundant for the oxidation of nitrogen and organic matters.However,remained organic matter was not enough for the denitrification of nitrogen nitrate.Complete denitrification could be realized by adding external organic matters.The high initial COD concentration would cause heterotrophic bacteria to consume more oxygen,which made the nitrification of the nitrobacteria less in quantity more difficult.

关 键 词：水体氮自净 同步硝化/反硝化 藻类光合作用 大气复氧 氨氮 硝酸氮 

分 类 号：X703.1[环境科学与工程—环境工程]