1) chemical oxygen demand
COD
1.
The experimental results show that the declining rates of chromaticity and chemical oxygen demand(COD) can extend to 84% and 60% respectively.
实验结果表明:在pH值为3,m(Fe)/m(C)为6,转速为150r/min,振荡反应120min的条件下,色度下降率达到84%以上,化学需氧量(COD)下降率大于60%,水质得到明显改善,有利于后续生化处理。
2.
The main defects of the standard method for the determination of chemical oxygen demand in water by potassium dichromate, such as measurement time consuming, Hg salt polluting, Cl~- disturbance were ameliorated by increasing acidity and adding catalyst silver sulfate.
重铬酸钾标准法测定水样的COD存在耗时长、汞盐二次污染和氯离子干扰等缺陷。
3.
It is shown that colority and chemical oxygen demand of the wastewater can be decreased to thirty times and less than 300 mg/L respectively by 10% iron(Ⅲ) chloride liquor and powdered carbon.
结果表明:采用10%FeCl3溶液和粉末活性炭处理该尾水,色度和COD一般分别可降到30倍与300mg/L以下,达到酒精行业废水排放二级标准。
2) CODCr
COD
1.
Detection of CODcr by Microwave Digestion Photometric Method and Its Unified Benefits Analysis;
微波消解光度法测定COD及综合效益分析
2.
The correlation of BOD5 and CODcr were analyzed in this paper according to the measured data of water quality of Cihu Lake in Hubei Province and the mathematical statistics, and meanwhile some questions in applying the correlation are also presented.
根据湖北省磁湖的实测水质数据资料,应用数理统计的方法分析了该水体BOD5和CODcr间的相关关系,同时也指出了一些BOD5和CODcr的相关性在实际应用中应该注意的问题。
3.
Properties of modified bentonite were characterized by various analysis techniques and modified bentonites were applied to pretreatment of high strength landfill leachate with CODCr up to 20,000~37,000mg/L.
将其应用于COD高达20000～37000mg/L的垃圾渗滤液的预处理,以垃圾渗滤液的COD去除率为考察指标,对原土和有机改性土的处理效果进行了对比,确定了改性膨润土最佳用量以及最佳反应条件。
3) COD value
COD值
1.
This experiment was conducted to determine the loss rates of four kinds of pellets with drying method and the COD values with potassium permanganate method after different periods of pellets immersion in distilled water.
采用烘干干燥法和高锰酸钾法分别测定了市售的罗非鱼沉性饲料、罗非鱼膨化饲料、对虾沉性饲料、牛蛙膨化饲料入水后的散失率及水体COD值随时间的变化。
2.
The results show that the COD value of different types of glass raw materials differs from each other greatly; the optimal proportion of H2SO4:H3PO4 is 4:1; the optimal acid added order is phosphoric acid first and sulfuric acid the second; the optimal digestion time for chemical raw materials is 15min, and for mineral raw materials is 30min.
为提高浮法玻璃原料化学需氧量(COD)的测定效率,研究了混酸消解法测定浮法玻璃原料COD值的影响因素和最佳实验条件。
4) high COD
高COD
1.
Many industrial producing processes discharge high salinity and high COD organic wastewater,it contains not only lots of suspended,colloidal and soluble organic substance,but also high concentration inorganic salts.
许多工业生产过程中会排放高盐度、高COD有机废水,不仅含有大量的悬浮态、胶体态和溶解态的有机物质,还含有高浓度的无机盐类(此类废水污染严重,是属于极难处理的废水)。
5) COD
[英][,si: əʊ 'di:] [美]['si 'o 'di]
COD值
1.
Discuss on end-point judgment of flax retting with COD;
用COD值定量判断亚麻脱胶终点的探讨
6) COD/ SO2-4 ratio
COD/SO42-
补充资料：COD
分子式：
CAS号：
性质：简称COD，指用氧化剂氧化水中的需氧污染物质时所消耗的氧量，是表示水中需氧的污染物质含量的重要综合指标。该值越高，说明水中的需氧物质越多，污染程度越大。化学需氧量与生化需氧量的区别在于：后者是通过生物化学作用进行氧化，有机物等被氧化分解的速度较慢；而前者是通过氧化剂进行化学氧化，速度较快，用较短时间即可得到检测数据。化学需氧量用10-6或mg/L表示。我国工业废水排放标准规定，在工厂排出口的废水中，化学需氧量(重铬酸钾法)最高容许浓度为100mg/L。
CAS号：
性质：简称COD，指用氧化剂氧化水中的需氧污染物质时所消耗的氧量，是表示水中需氧的污染物质含量的重要综合指标。该值越高，说明水中的需氧物质越多，污染程度越大。化学需氧量与生化需氧量的区别在于：后者是通过生物化学作用进行氧化，有机物等被氧化分解的速度较慢；而前者是通过氧化剂进行化学氧化，速度较快，用较短时间即可得到检测数据。化学需氧量用10-6或mg/L表示。我国工业废水排放标准规定，在工厂排出口的废水中，化学需氧量(重铬酸钾法)最高容许浓度为100mg/L。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条