COD removal rate of the wastewater has not been reduced after 10time reuse of the extracting agent.
萃取后的络合相经碱解分离即可回收萃取剂，萃取剂循环使用10次，废水的COD去除率无下降趋势。
Main factors affecting COD removal rate were orderly aeration volume, aeration and settling duration.
影响cod去除率的最主要因素为曝气量，曝气时间、沉淀时间也有一定影响。
With COD removal rate as a reference, several magnetic coagulants used in restaurant waste water are systematically studied.
以COD去除率作性能参数，考察了几种复合磁絮凝剂在高、低二种浓度餐饮废水中的絮凝效果。
It requires change with changes in feed water quality conditions, the decolorization effect of hydrophilic poor, COD removal rate.
缺点是需随着水质变化改变投料条件，对亲水性染料的脱色效果差，cod去除率低。
The experiment with municipal wastewater indicated that the turbidity removal ratio was larger than 90%, and COD removal rate was above 80.0%.
对城市污水絮凝实验表明，浊度去除率最高达90%左右，COD去除率在80。 0%以上。
The results showed that modified fly ash was effective to adsorb COD from the brewery wastewater. The efficiency of COD removal rate increased from 50% to 89%.
结果表明：改性后粉煤灰的吸附混凝性能有显著的提高，啤酒废水中COD的去除率从50%增加到89%。
The results of modified bentonite used in treating chemical industrial waste water showed that the highest COD removal rate of inorganic modified bentonite is 55.4 %.
结果表明改性膨润土应用于化工废水处理，无机改性膨润土COD去除率最高为5 5 . 4 %。
The process ensures that the COD removal rate, the ammonia nitrogen removal rate and the wastewater removal rate of the wastewater treatment process are improved greatly.
本发明处理废水过程的COD去除率和氨氮去除率、废水回收率都得到很大的提高。
Under such conditions, the treatment had obvious effect. COD removal rate reached 81.1%, there was a marked improvement in color which was from pale yellow into colorless.
在该反应条件下，处理效果明显：COD去除率可达到81.1%，色度也有明显的好转，由浅褐色变为无色。
In the natural inoculation process, the treatment effect changed greatly, COD removal rate was 61.86% and an upward trend maenad natural inoculation was success, lasted 27 days.
自然挂膜阶段历时27天，反应器处理效果变化幅度较大，COD去除率达到61.86%且有上升的趋势。
The results show that cell voltage and initial COD of the wastewater have the biggest effect on the COD removal rate. But the effect of electrolysis on electro-catalytic oxidation is not remarkable.
研究发现，槽电压和废水初始COD对COD去除率的影响最大，而电解质的加入对电催化氧化影响不显著。
The sand filtration is compared with fibre-ball filtration on the removal rate of turbidity, COD and SS, and on the head losses, filtration period and filtrate.
比较了砂滤和纤维球过滤对浊度、COD、SS和油的去除情况，及其在水头损失、过滤周期和产水量等方面的异同。
The results show that the removal rate of its COD and colourity are 88.3% and 98% respectively, arsenic content can reach undetected level under the optimum conditions.
结果表明，在适宜条件下，渗滤液COD和色度的去除率可分别达到88.3%和98% ，砷可达到检不出水平。
Compared with the traditional rapid infiltration pond, it has no obvious increase for the removal rate of COD and SS.
但是相比于传统的快渗池，改进型人工快渗池对COD、SS的去除效果并没有显著提高。
After two weeks, removal rate of the system to COD and ammonium achieved separately 97.2% and 96.4%, and the membrane-formed system had stronger ability to resist hydraulic and pollution loading.
运行到两周以后对COD和氨氮的去除率分别达到97.2%、96.4%，且挂膜后的系统有较强的耐水力负荷和污染负荷的能力。
The degradation rate of the crude oil and the removal of the COD of the single and mixed strains were studied.
实验结果表明，单一菌株对原油和COD具有很好的去除效果，混合菌株对原油和COD去除效果更加显著。
The COD of the CASS biochemical pool is mostly dissolved organic matter, the removal rate of which is 20.0%.
CASS生化池的COD绝大部分是溶解性的有机物，对COD的去除率占总去除率的20.0%。
It was found that carbon steel scraps and active carbon mixed reactor effectively removed COD in coking wastewater and the removal rate of COD was up to 80%.
结果表明：首先采用碳钢屑-活性炭混合床反应器可以有效地去除焦化废水中的COD，其去除率能够达到80%左右。
The removal rate of COD, NH3-N, HCHO were high, and the average removal rate of them were over 93%, especially, the HCHO's removal rate reached over 99%.
对于COD、氨氮（NH3-N）、甲醛（HCHO）的去除率高，各项指标的平均去除率为93%以上，尤其是HCHO的去除率高达99%以上。
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。
The results showed that the removal ratio of COD was low with highest removal rate of 30%;
结果表明：水面流湿地系统对COD去除效果不明显，去除率最高仅为30 % ；
The experimental results showed that the removal rate of COD, NH3-N and turbidity in BAF system comes up to 88.1%, 60.1% and 95.1% respectively.
长期运行试验结果表明，曝气生物滤池对COD、氨氮及浊度等具有良好的去除效果，平均去除率分别达到88.1%、60.1%和95.1%。
When the concentration was raised, removal rate of COD increased correspondingly;
浓度增加，COD去除率也相应增加；
When the concentration was raised, removal rate of COD increased correspondingly;
浓度增加，COD去除率也相应增加；
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