So, fewer cod and an explosion of zooplankton-eating sprats means more algae and less oxygen.
所以，鳕鱼数量减少，就造成了西鲱鱼增多，相应的就会消耗掉浮游动物，于是海藻增多，氧气减少。
A method based on all band ultraviolet scanning for measuring water chemical oxygen demand (COD) was introduced, and the method was applied to develop an on-line COD measuring instrument.
介绍了一种基于紫外全波段扫描的水质化学需氧量(COD)测量技术以及运用该技术设计开发的在线COD测量仪器。
To rapidly determine the pollution extent of wastewater, the potential of near infrared(NIR) spectroscopy for measurement of chemical oxygen demand(COD) in wastewater was investigated.
为快速确定废水的污染程度，研究了运用近红外光谱法测量废水化学需氧量（COD）的可行性。
The HCR technology bears the advantages of small occupation of land, reasonable design, high removal rate of COD, high utilization coefficient of atmosphere oxygen, convenient and secure manipulation.
HCR工艺具有占地省、设计合理、COD去除率高、空气氧利用率高且操作便利安全等优点。
A method for the rapid and accurate determination of chemical oxygen demand (COD) using potassiumdichromate as oxidant under new conditions is described in this paper.
本文提出了一种以重铬酸钾为氧化剂在新的条件下快速及准确测定化学耗氧量（COD）的方法。
Meanwhile, it could decrease the COD while increased the dissolved oxygen and transparency of the water.
同时可以降低COD值，提高溶氧水平和透明度。
There was 75.75% increase on chemical oxygen demand (COD).
生化耗氧量养殖初、末期相比较升高了75.75%；
After several days' impact of the urban life organic rubbish detest oxygen ferment natural pond liquid, COD removal rate is rising obviously and over 80% with the trained detest sludge.
使用原水后，培养好的厌氧污泥经几天的冲击，去除效果明显回升，COD去除率可达80%以上。
Microbial common strike of the combination process includes inlet COD, BOD, alkalinity, low dissolve oxygen of aeration pond.
该工艺组合中微生物经常受到的冲击有进水COD、BOD、碱度和曝气池低溶解氧。
Simultaneity give out the chemical oxygen consumption(COD)and total organic carbon(TOC)the linear relationship equation.
同时给出了化学耗氧量（COD）和总有机碳（TOC）之间的线性关系方程。
An experiment was made on the pharmaceutical wastewater treatment with the contact oxidation process by adding effective microorganisms (em) to remove the chemical oxygen demand (COD).
应用生物接触氧化法投加有效微生物菌群(EM)对制药废水中化学需氧量的去除效果进行试验研究和分析。
The method of flow injection analysis (FIA) is described for continuously measuring chemical oxygen demand (COD) in seawater.
利用流动注射分析技术（FIA）快速、连续测定海水化学耗氧量（COD）。
The influence factors of chemical oxygen demand (COD) and removal effect of chroma during the wet air oxidation of degradation-resistant pesticide wastewater with high salinity were investigated.
采用湿式氧化技术研究高盐度、难降解农药废水在湿式氧化反应中COD去除率的影响因素及色度的去除效果。
Secondly, denitrification rate is improved because the oxygen pool is before the anaerobic pool and the anaerobic denitrifying bacteria readily biodegradable COD as carbon source;
第二，缺氧池与厌氧池位置互换，使得反硝化菌优先获得易降解有机物作为碳源，反硝化速率得到提高；
The purpose of studying the correlation of total organic carbon (TOC) with permanganate index and chemical oxygen demand (COD) has been stated.
叙述了研究总有机碳与高锰酸盐指数及化学需氧量相关关系的目的。
Chemical oxygen demand (COD) is a synthetical indicator which represents the degree of organic pollution in water.
化学需氧量(COD)是表征水体中有机物污染程度的一个综合性指标。
Temperature had an evident influence on chemical oxygen demand (COD) removal.
温度对系统COD去除能力有着比较明显的影响。
Chemical Oxygen Demand (COD) is the representative index of sewage water.
化学需氧量(简称COD)是水质污染程度的代表性指标。
The Chemical Oxygen Demand(COD) and the Chromaticity Color ( CC) reduction rates were 93.94% and 64. 62% respectively.
经过微电解工艺处理的染料工业废水色度和化学需氧量（COD）去除率分别为93．94％和64.62％。
The Chemical Oxygen Demand(COD) and the Chromaticity Color ( CC) reduction rates were 93.94% and 64. 62% respectively.
经过微电解工艺处理的染料工业废水色度和化学需氧量（COD）去除率分别为93．94％和64.62％。
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