查询词典 cod end

Combined with polysilicate aluminum and ferric, this coagulant was thus used to treat tanning wastewater which COD value is ...

这种混凝剂与聚硅酸铝铁絮凝剂配合处理COD为 15 0 0～ 2 0 0 0mg/L制革废水，SS ，COD ，硫化物和铬的去除率分别为 95 %，93 %，92 %和 88%。

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。

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。

After 3 hours rection time, the removal of COD and NH3-N are up to 95% and to 70%;(3) A polot (0.25t/h) study of municipal waste water treatment by photocatalysis-ozonation was done in Wuhan municipal wastewater treatment plant.

结果表明，在反应3hr后，废水中COD去除率达到95%，氨氮去除率达到70%；(3)在武汉水质净化厂完成了UV/ TiO_2/O_3法处理城市污水中试研究(0.25t/h)，在停留时间为2hr时，COD出水低于30mg/L，此时吨水处理成本为2.56元。

When the concentration of Mg~(2+) is 20mg/L, comparing to parallel reactor the ratio of the COD removement of dosing

大于或低于2mg／L时，加药反应器COD去除率相对于对照桶COD去除率的提高都小于5.35个百分点。

In this experiment, COD removement is used as the macro-index to reflect the change of the activity of microbial indirectly and we expect to find the optimum concentration of the growth of microbial in the biological treatment system of sewage.

通过对比试验表明：(1)投加金属盐MnCl_2·4H_2O能够在一定程度上提高污水COD的去除率，在锰离子的投加量为0.5mg／L时，加药反应器COD去除率相对于对照桶COD去除率有4.3个百分点的提高。

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。

When the concentration of Mn~(2+) is 0.5mg/L, compared with parallel reactor the ratio of the COD removement of dosing reactor is improved about 4.3 percent.

大于或低于20mg／L时，加药反应器COD去除率相对于对照桶COD去除率的提高都小于5.07个百分点。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。