查询词典 cod

The results show that each cationic flocculant has optimal dosage range, generally from 50 mg/L to 80 mg/L. COD removal efficiency of the tested water can reach 78%or more, the transmittancy can reach 90%or more.

研究结果表明，各种阳离子絮凝剂量的最佳使用范围一般在50～80 mg/L，上清液COD去除率达到78%以上，透过率达到90%以上。

Compared with the sample of higher cation, the sample of higher molecular weight in the treatment is more important. After treatment, COD of wastewater can be reduced by 74%～77% and the transmittancy can reach 92%～99%. The formed floc. is solid and can easily be dewatered.

对废纸再生造纸废水的处理使上清液COD去除率达74%～77%，透过率达92%～99%，均超过作对比用的进口产品的处理效果，且下层絮体较大、坚韧、易于脱水。

Zantedeschia aethiopica constructed wetland system has high COD and N removal rate in dominant period than in vigorous period, caused by the high temperature in dominant period. Low TP removal rate in dominant period than in vigorous period caused by the following reasons, first the decay of litter in the dominant period is obvious, and the high inflow rate in the dominant period.

马蹄莲人工湿地系统在休眠期（6月和7月）和在旺盛生长期相比，由于温度高而具有高的COD，和N去除率，由于枯枝落叶的腐烂溶出以及进水负荷高而具有低的TP去除率。

The effects of the treatment show that the best effect is achieved by pillar ed acidified bentonite,whose COD removal efficiency is more than 80% and chroma removal efficiency is more than 95%.

处理效果最佳的是柱撑酸化膨润土，其对染料废水COD的去除率可达80%以上，色度去除率可达95%以上。

The results indicated that COD,the contents of suspension,ammoniated nitrogen and nitrated nitrogen were much lower than those of mono...

结果表明，循环水养殖系统内虾池水层悬浮物数量、COD值、氨态氮和硝酸态氮含量比对照组对虾单养池明显降低(P·01)。

The result indicates that the PASC thus synthesized enjoys good stability and excellent decoloring and detergent power as well as good COD value in removing the sewage,therefore,it has better flocculating effects.

结果表明，所合成的PASC具有较好的稳定性和较好的脱色、去浊能力，同时能较好的降低废水的COD值。比传统的铝、铁盐絮凝剂相比，有着更好的絮凝效果。

A sudy is made on demineralizing the cloudiness and COD in landfill leachate by means of the pretreatment with polymeric-iron to create a good condition for the following biological treatment process and afforesting water reproduction.

在国内仍然是一个没有得到很好解决的难题。本课题主要研究采用聚铁预处理垃圾渗滤液中较多的浊度及COD，为后续生物处理及作为绿化用水创造良好的条件。

Chapter two investigates relations between diachronic forms of lexeme and their explanations, to analyse and show how COD offers information of lexeme's etymologies and marks out historical senses, and how it indicates ancient as well as former senses in a set of format guidelines which need improvement.

第一章探讨共时关系中的词位形式及规范与其释义方式之间的关系，分析汉、英词位的字形、词形结构的相通之理及其辨形释义方式，比较《现汉》与COD对词位规范化的体例异同。

At the situation of keeping the concentration of inocula constant, comparing the influence of two concentrations, 6% and 7.5%, on COD removal rate, volume gasproduction rate and total gas yield, the results indicate that the concentration of 7.5% is better.

在接种物浓度一定的条件下，通过比较6％、7.5％两种不同发酵液浓度对COD去除率、容积产气率及总产气量的影响，结果表明，从整个反应过程变化趋势来看，发酵液浓度为7.5％的处理产气效果好。

The result shows that the recycling effluent upgrades significantly the removal for BOD_5,COD,SS,and NH~+_4-N,and BOD_5 removal rate meets the Monod equation;most part of NH~+_4-N is nitrified and the removal rate of NH~+_4-N is linear with the surface loading rate.Along with the nitrification,alk...

结果表明：循环出水显著提高了对BOD5、COD、SS和NH+4-N的去除率，且对BOD5的去除满足Monod方程；大部分NH+4-N的去除率与其表4-N被硝化，对NH+面负荷率呈线性关系；随着硝化反应的进行，碱度减少，pH值不断降低；循环出水可引入部分氧气，延长了污染物和附着于植物根系微生物的接触时间，提高了对污染物的去除率。

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。