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反硝化污泥    
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  denitrifying activated sludge
    The nitrifying activated sludge nitrifying and denitrifying activated sludge and traditional activated sludge were immobilized with polyvinyl alcohol(PVA) and the immobilized pellets were prepared by circulatory freezing and thawing method. After cultivated the pellets were used to treat Composed NH4+-N Wastewater in fluidized bed reactor.
    本文以PVA为载体,采用冷冻包埋法分别制备了固定化硝化污泥、混合硝化反硝化污泥以及传统活性污泥颗粒,经活化或驯化后在三相流化床中处理氨氮废水。
短句来源
  denitrifying activated sludge
    The nitrifying activated sludge nitrifying and denitrifying activated sludge and traditional activated sludge were immobilized with polyvinyl alcohol(PVA) and the immobilized pellets were prepared by circulatory freezing and thawing method. After cultivated the pellets were used to treat Composed NH4+-N Wastewater in fluidized bed reactor.
    本文以PVA为载体,采用冷冻包埋法分别制备了固定化硝化污泥、混合硝化反硝化污泥以及传统活性污泥颗粒,经活化或驯化后在三相流化床中处理氨氮废水。
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  denitrifying activated sludge
Isolation of a fungus from denitrifying activated sludge that degrades highly chlorinated dioxins
      
Using a 700-ml bioreactor, denitrifying activated sludge was cultivated under denitrifying conditions by adding 2.0?ng of a mixture of 4- to 8-chlorinated dioxins from fly ash.
      
Lignin was added to the medium as a color indicator of aromatic compound degradation, and the lignin-decolorizing microorganisms in the denitrifying activated sludge were screened.
      
Degradation of chlorinated dioxin in denitrifying activated sludge from leachate treatment plant of a landfill
      


The up flow sludge bed(USB) was applied for denitrification and bio film for nitrification to treat synthetic sugar wastewater and sewage,so USB can remove organics and nitrate saving energy consuming for aerobic organics removal and biofilm holds high nitrification rate.The test results are shown as follows.Under organics loading of less than 2 kg COD/m 3·d,effluent COD was below 60 mg/L.When organic loading and ammonium loading in aerobic unit were less than 1 3 kg COD/m 3·d and 2 kg NH 3 N/m 3·d,respectively,effluent...

The up flow sludge bed(USB) was applied for denitrification and bio film for nitrification to treat synthetic sugar wastewater and sewage,so USB can remove organics and nitrate saving energy consuming for aerobic organics removal and biofilm holds high nitrification rate.The test results are shown as follows.Under organics loading of less than 2 kg COD/m 3·d,effluent COD was below 60 mg/L.When organic loading and ammonium loading in aerobic unit were less than 1 3 kg COD/m 3·d and 2 kg NH 3 N/m 3·d,respectively,effluent ammonium was below 5 mg/L The ratio of COD/NO - 3 N is the key factor.Complete denitrification was obtained for sugar wastewater with COD/NO - 3 N of higher than 5,but not for sewage with COD/NO - 3 N of 10.Excess organics could decrease the nitrification in aerobic unit and HRT was the main factor affecting the nitrification.When HRT was shortened to 1 5 h,ammonia removal rate decreased to 85%.The denitrification micro organisms activity was comparative for the treatment of sugar wastewater and sewage.

将上流式颗粒污泥床(USB)用于反硝化和生物膜法用于自养硝化处理蔗糖配水和小区生活污水,反硝化污泥床去除有机物和硝态氮具有节省需好氧去除有机物的能耗的优势,同时好氧生物膜法硝化效率高。试验结果表明,当工艺进水的有机负荷小于2kgCOD/m3·d时,出水COD均小于60mg/L,好氧单元进水有机负荷和氨氮负荷分别小于13kgCOD/m3·d和09kgNH3N/m3·d时,出水氨氮小于5mg/L;COD/NO-3N是影响反硝化的关键因素,处理蔗糖配水时,COD/NO-3N大于5时反硝化脱氮完全,而COD/NO-3N为10时,生活污水作为电子供体仍然脱氮不完全;有机物含量过高导致好氧单元硝化效果降低,HRT是影响好氧单元硝化效率的主要因素,HRT缩短为15h时,氨氮去除率降低了85%左右;同时处理蔗糖配水和生活污水的反硝化菌活性相当。

Denitrification under high nitrate concentration was studied in a fed batch mode. Methanol,sodium acetate and effluent from anaerobic (AD) were compared as the carbon sources.A batch aeration seems to promote the establishment of denitrifying bio flocks of good settling characteristics .The bio flocks produced in an anoxic reactor were of inferior settling characteristics.Bio flocks at concentrations of 4 to 5 g VSS/L denitrify efficiently on all three carbon sources tested.A maximum nitrate removal rate...

Denitrification under high nitrate concentration was studied in a fed batch mode. Methanol,sodium acetate and effluent from anaerobic (AD) were compared as the carbon sources.A batch aeration seems to promote the establishment of denitrifying bio flocks of good settling characteristics .The bio flocks produced in an anoxic reactor were of inferior settling characteristics.Bio flocks at concentrations of 4 to 5 g VSS/L denitrify efficiently on all three carbon sources tested.A maximum nitrate removal rate was found to be 0.486 g NO 3 N/(g VSS day).Nitrite accumulated iniatially,but its concentration decreased with time,and eventually reached zero when acetate or AD effluent were used as carbon source.

本实验研究在序批式模式下高浓度硝酸盐的反硝化,比较用甲醇、醋酸钠和消化污泥上清液作碳源。实验发现,间歇曝气有助于提高反硝化污泥的沉降性能,而厌氧条件下,污泥的沉降性能差。污泥浓度4~5gVSS/L下,3种碳源都能有效地进行反硝化。最大硝酸盐去除率为0486gNO3N/gVSS·d。开始阶段,亚硝酸盐浓度增加,但用醋酸盐和硝化污泥上清液作碳源,其浓度最终下降为零。

 
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