1) SND Mechanism
同时硝化反硝化原理
2) simultaneous nitrification and denitrification
同时硝化反硝化
1.
Study on the OGO Process for Simultaneous Nitrification and Denitrification;
OGO反应系统同时硝化反硝化脱氮试验研究
2.
Removal effect of organic pollutants during the course of treating landfill leachate with simultaneous nitrification and denitrification
垃圾渗滤液同时硝化反硝化处理中有机污染物去除效果
3.
In order to improve the efficiency of biological treatment of living sewage with rich nitrogen and phosphorus,and reduce the carbon source,the character of simultaneous nitrification and denitrification and biological phosphorus removal of Sequencing Batch Biofilm Reactor(SBBR) in treating living sewage under the condition of anaerobic /anoxic process was studied.
为提高生活污水氮磷处理效率和节约碳源,以软性填料的序批式生物膜法(SBBR)处理生活污水,研究在厌氧/缺氧模式下生物聚磷以及同时硝化反硝化的特性。
3) simultaneous nitrification-denitrification
同时硝化-反硝化
1.
Development of biological denitrification technologies were introduced and evaluated including shortcut nitrifica-ion-denitrification,simultaneous nitrification-denitrification,anaerobic ammonium oxidation(ANAMMOX) and SHARON-ANAMMOX.
对生物脱氮技术新进展——短程硝化-反硝化、同时硝化-反硝化、厌氧氨氧化和半硝化-厌氧氨氧化进行了介绍与评价。
4) simultaneous nitrification and denitrification(SND)
同时硝化反硝化
1.
By comparing the traditional theory of biological nitrogen removal,the characteristic about Simultaneous Nitrification and Denitrification(SND) is raised.
通过对比传统生物脱氮理论,提出同时硝化反硝化技术的优点,结合国内外研究现状,主要从微环境理论和生物化学方面进行综述,并指明好氧反硝化今后的研究方向,以达到提高系统处理能力和效率的目的。
2.
Under the conditions of constant temperature and low concentration of ammonia and nitrogen,the coupling process of short-cut nitrification and simultaneous nitrification and denitrification(SND) is realized in the SBR through controlling the dissolved oxygen(DO) to be 0.
2 mg/L,在SBR反应器中成功实现短程硝化与同时硝化反硝化工艺的耦合;亚硝酸累积率达到78。
5) simultaneous nitrification denitrification
同时硝化反硝化
1.
The progresses of biological nitrogen removal of waste water, such as the investigation on shortcut nitrification denitrification, simultaneous nitrification denitrification (SND), anoxic ammonium oxidation (ANAMMOX) and ecology superior nitrification denitrification (ECOSUNIDE) were analyzed and discussed.
对短时硝化、短程硝化反硝化、同时硝化反硝化及缺氧硝化等生物脱氮新技术的研究和开发进展进行了分析。
2.
There appear many novel technologies and new concepts such as shortcut nitrification denitrification?simultaneous nitrification denitrification and anaerobic ammonium oxidation, which develop the field of biotechnology of ammonia removal in wastewater.
近年来出现了短程硝化反硝化、同时硝化反硝化和厌氧氨氧化等生物脱氮的新概念和新技术,为生物脱氮技术开拓了新的发展空间;同时特殊菌株的筛选和培育也是氨氮脱除生物技术发展的热点之一。
6) simultaneous nitrification and denitrification
同时硝化/反硝化
1.
With analysis in the experiments,the best work condition of simultaneous nitrification and denitrification and phosphorus removal in Carrousel 2000 oxidation ditch was determinated,when:SRT=20d,HRT=15h,DO=1.
研究中通过分析,确定了Carrousel 2000氧化沟进行同时硝化/反硝化和除磷试验研究的最优工况,即SRT=20d,HRT=15h,DO(好氧区溶解氧的平均值)=1。
补充资料:反硝化作用
硝酸盐在某些微生物的作用下还原为气态氮的过程。多发生于沼泽、湖泊和渍水土壤等缺氧环境中。其反应过程可简示为:2HNO3─→2HNO2─→2HNO─→N2。参与作用过程的微生物主要是反硝化细菌。作用的强度主要取决于土壤中的氧浓度和土壤pH。所有的反硝化细菌都是兼气性细菌,反硝化作用只有在土壤中的氧浓度较低时才能进行。当氧浓度减至5%以下时,反硝化作用明显增强。在过湿的环境中或在通气土壤的局部嫌气区(如根际),都能测得较明显的反硝化作用。反硝化作用的最适pH为7.0~8.2。当pH低至5.2~5.8或高达8.2~9.0时,反硝化作用的强度都会显著减弱。
在自然界,除上述通常由反硝化细菌引起的反硝化作用外,还常由以下途径使介质中的硝酸盐还原为气态氮:①某些微生物通过对硫的氧化或某些含硫化合物,而使硝酸盐还原:2S+6KNO3+2CaCO3─→2K2SO4+2CaSO4+2CO2+3N2。 ②通过纯化学过程使硝酸盐还原为气态氮。但这一过程与真正的反硝化作用不同。
由于反硝化作用导致土壤氮或施入土壤中的氮肥中氮的损失,因而对植物生长不利。农业生产上常需采取措施改善土壤通气状况和调节土壤酸度,防止和减缓反硝化作用的发生。
在自然界,除上述通常由反硝化细菌引起的反硝化作用外,还常由以下途径使介质中的硝酸盐还原为气态氮:①某些微生物通过对硫的氧化或某些含硫化合物,而使硝酸盐还原:2S+6KNO3+2CaCO3─→2K2SO4+2CaSO4+2CO2+3N2。 ②通过纯化学过程使硝酸盐还原为气态氮。但这一过程与真正的反硝化作用不同。
由于反硝化作用导致土壤氮或施入土壤中的氮肥中氮的损失,因而对植物生长不利。农业生产上常需采取措施改善土壤通气状况和调节土壤酸度,防止和减缓反硝化作用的发生。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条