简介:摘要:随着市场对精细化工化学品需求的增大,各种特定化工废水,如丁酮肟高TN、低C/N比、具有一定挑战性的废水需要处理。本工程根据丁酮肟废水的水质特性,采用两级A/O工艺有效处理了高TN、低C/N比的丁酮肟废水,出水COD去除率保持在95~99%,NH3-N去除率可达到98%,TN去除率99%,TP去除率为90~95%,出水达标排放。其中,由于一级O池的自养硝化细菌比较敏感、易受到化工废水抑制,对于装置清洗水需要单独收集后每次少量和正常生产废水混合后进入生化装置处理。同时,根据本工程应用的数据,采用传统硝化反硝化处理高TN、低C/N比的废水需要投加大量碳源进行反硝化,可采用性价比更高的碳源节约运行成本,或是进一步挑战研发、应用短程硝化-反硝化和厌氧氨氧化工艺。
简介:Theobjectinthispaperistoconsidertheproblemofexistence,uniqueness,explicilrepresentationof(0,2)-interpolationonthezerosof(1-x2)Pn-1(x)/xwhennisodd,wherePn-1denotesLegendrepolynomialofdegreen-1,andtheproblemofconvergenceofinterpolatorypolynomials.
简介:EveryOctober,carvedpumpkinspeeroutfromporchesanddoorstepsintheUnitedStatesandotherpartsoftheworld.Gourd-likeorangefruitsinscribedwithghoulishfacesandilluminatedbycandlesareasuresignoftheHalloweenseason.Thepracticeofdecorating"jack-o'-lanterns"-thenamecomesfromanIrishfolktaleaboutamannamedStingyJack-originatedinIreland,wherelargeturnipsandpotatoesservedasanearlycanvas.IrishimmigrantsbroughtthetraditiontoAmerica,homeofthepumpkin,anditbecameanintegralpartofHalloweenfestivities.