查询词典 COD

Slaking pretreatment: distilled water and potassium persulphate solution are added and placed into a slaking hole of a COD slaking instrument, and simultaneously blank solution is taken and processed together with a sample to be detected with the same method; C.

消解预处理：加入蒸馏水和过硫酸钾溶液，置于COD消解仪的消解孔中；同时另取空白溶液，与待测样品同时以同样方法处理；C。

The results show that, the proper feeding order and feeding amount are that: aluminium polychloride 19.2 mg/L+PAM 0.075 mg/L, the COD is 98.2 mg/L, it meets secondary discharge standard.

结果表明，最合适混凝剂投加顺序及投加量为：聚合氯化铝19.2 mg/L+PAM 0.075 mg/L。出水COD 98.2mg/L，达到二级处理排放要求。

The contents of 10 species of polycyclic aromatic hydrocarbons and the routine indexes of COD, BOD5, etc.

用HPLC和化学分析法，监测了1999~2002年丰水期和枯水期杭州市地面水中10种多环芳烃的含量和COD、BOD5等常规指标。

ABSTRACT Polysilicate aluminum and ferric saltflocculant was prepared from coal refuse and pyrite slag, and was used as flocculant in the treatment of dyeing wastewater for removing turbidity and COD and decolorizing.

摘 要 研究利用煤矸石及硫铁矿烧渣作原料制备PSAAF并用于印染废水的处理。结果表明，PSAAF有良好的除浊、脱色和除COD性能；尤其对亲水性染料，具有独特的去除效果。

Aquatic plants were soaked in two purifying-tanks to investigate the effects of illumination intensity and aeration on diurnal variations of Chla,SP,POD of Pontederia cordata and pH,DO,COD,NH+4-N,TP of water from purifying-tanks when treating the malodorous river water at seven different times,another blank purifying-tank was set as a control. Comparative studies and correlation analysis of these different indicators were carried out to improve the plants working efficiency and provide scientific basis for optimal operation of plant purifying-tanks.

测定了曝气和非曝气的2个植物净化槽在1 d中7个不同时间点的出水水质理化指标(pH、DO、COD、NH+4-N、TP)及植物叶片的叶绿素、可溶性蛋白含量及过氧化物酶活性，另设空白槽为对照；试验目的是研究各指标的日变化情况及相互关系，为提高梭鱼草净化黑臭河水的处理效率及其植物净化槽的合理优化运行提供科学依据。

The performance and the sludge characteristics of an upflow anaerobic sludge blanket reactor were investigated for the treatment of low concentration (COD 400～600 mg·L-1) domestic wastewater at psychrophilic temperature (15±1℃).

考察了厌氧处理低温(15±1℃低浓度(COD 400～600 mg·L-1)模拟生活污水试验规模UASB反应器的工作状况及污泥特性。

Flocculants in wastewater treatment has become increasingly widely used, in which high-performance composite coagulant in water treatment technology occupies an important position, to that end, research synthesis of a new type of high-performance composite PFS purificant PISC, and dying, coal washing, paper and municipal sewage and other industrial wastewater purification experiments confirmed that the water purification agent with the exception of turbidity, detreated reduce COD, BOD5 and SS functions.

在废水处理方面絮凝剂已越来越广泛地被应用，其中高效复合混凝剂在水处理技术中占有十分重要的地位，为此，研究合成了一种新型的高效复合聚铁净化剂PISC，并对印染、洗煤、造纸和城市污水等工业废水进行净化实验，证实该净水剂具有除浊、脱色、降低COD、BOD5及SS的功能。

The paper discussed different effects (such as oil-water ratio, extraction ,mixing time, equipment time and so on) on the removal efficiency of COD and the acidity of raffinate, and the effect of active carbon dosage and temperature on the discoloring efficiency.

实验探讨了油水比、萃取混合时间、静置时间等因素对COD去除率及酸度的影响，研究了活性炭加入量及温度对脱色效果的影响。

Through the parallel experimentation, it is indicating:(1)It can improve the ratio of COD removement to some extent when the MnCl_2·4H_2O was put in the sewage.

适当的添加镁离子能够促进活性污泥的活性，改善出水水质。在镁离子的投加量为20mg／L，加药反应器相对于对照桶COD去除率有5.07个百分点的提高。

The results indicate that the p retreatment process can improve biodegradability of the wastewater and reduce COD and colority,result

文摘：采用铁屑过滤法预处理可生化性差的印染废水，能改善废水的可生化性，降低废水的COD和色度，有利于后续生化处理。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。