1) removal rate of COD
COD的去除率
1.
The result is showed removal rate of COD over 56.
5min时,对废水处理得到较为满意的效果,COD的去除率 达56。
2.
The result is showed removal rate of COD over 67.
5min时,对废水处理得到较为满意的效果,COD的去除率达67。
2) COD removal
COD去除率
1.
The effects of operating conditions such as ultrasonic frequencies,ultrasonic powers,Fenton's reagent dosage and pH value on color and COD removal were investigated.
研究内容包括:超声波频率对垃圾渗滤液色度和COD去除率的影响,超声波功率对垃圾渗滤液色度和COD去除率的影响以及Fenton试剂用量和pH值对垃圾渗滤液色度去除率和COD去除率的影响。
2.
It was shown that the COD removal rate of sodium bentonite is 38.
膨润土应用于城市污水的吸附研究结果表明:膨润土原矿对废水中COD去除率为38。
3.
Under these conditions,the COD removal is about 88 % when hydrogen peroxide is put in wastewater by one time.
对采用Fenton试剂处理苯酚废水进行了研究,探讨了n[H2O2]、n[Fe2+]/n[H2O2]、pH值、反应温度、反应时间等因素对COD去除率的影响,确定了最佳处理条件:n[H2O2]=13 mmol/L,n[Fe2+]/n[H2O2]=1∶10,pH=3,温度为30℃,反应时间为60 min,COD去除率在88%左右。
3) COD removal rate
COD去除率
1.
On condition that the optimum dosage of Al_2(SO_4)_3 was 500 mg/L,the COD removal rate achieved 34%.
通过对废水处理前后各项指标及处理成本等各方面因素进行综合分析,结果得知,Al2(SO4)3作为马铃薯淀粉废水的混凝剂较为合适,此时Al2(SO4)3的最佳投药量为500mg/L,对废水的COD去除率可达到34%左右。
2.
To improve the influence of such experimental parameters as roasted temperature, roasted time, the amounts of catalyst and H2O2, radiant time and pH value, it was studied that the COD removal rate together with the optimum conditions such as the roasted temperature of TiO2 at 500℃, roasted time at 2h, the amount of TiO2 at 2.
以TiO2为催化剂,用光催化氧化法处理制浆造纸废水,讨论了不同实验条件如焙烧温度、焙烧时间、催化剂用量、H2O2用量、光照时间及废水pH值等对废水COD去除率的影响。
3.
The influences of pH value,adding amount of chitosan,stiring rate and flocculating time on the COD removal rate are investigated,the optimal experimental conditions are determined as follows: pH range of wastewater 6.
由甲壳素制备壳聚糖用于制浆造纸废水的处理,考察pH、壳聚糖用量、搅拌速率及絮凝时间等对COD去除率和透光度的影响,得出最佳实验条件:pH为6。
4) removal rate of COD
COD去除率
1.
the result indicate that the best removal rate of COD was 7.
5%催化剂的投加量、pH=6的反应体系和50min的光照时间,达到最大COD去除率7。
2.
The harmless treatment of oilfield oily sludge by oxiding in supercritical water is studied in laboratory,and the effects of the reaction temperature,the reaction pressure,the reaction time and the pH value on the removal rate of COD in the oily sludge are investigated.
考察了反应温度、反应压力、停留时间、pH值等条件对含油污泥COD去除率的影响。
3.
The factors influencing the reactors,such as HRT,COD of influent,organic loading etc,are analyzed,whose effects on removal rate of COD,gas-producing ratio and VFA of effluent are also examined.
以不同的水力停留时间,进水COD浓度,有机负荷,内循环回流比为因素,考察对COD去除率,产气率和出水VFA(挥发性脂肪酸)的影响。
5) COD removal efficiency
COD去除率
1.
The results showed that the COD removal efficiency could reach about 96% and CODcr of practical wastewater drop from 5827 mg/L to 419 mg/L while the chroma from 2000 to 30, reacting under the room temp.
结果表明,常温下处理实际含酚印染废水,在pH值为4~6,30%H2O2 12mL/L,镀铜铁屑5g/L,反应时间为45min时,COD去除率可达96%,其CODCr从5827mg/L降至419mg/L,色度从2000降至30,符合国家三级排放标准。
2.
The results showed that Co-Zn(1∶1)catalyst calcined at 400℃ exhibited better activity,the highest COD removal efficiency was achieved to 80% after 60 minutes reaction when the reaction conditions were 150℃,1.
2MPa时,反应60分钟,COD去除率达到80%。
3.
The application test results indicated that when the addition dosage of this cationic starch ranging from(200 mg/L) to 300 mg/L and the pH value of the waste=11,COD removal efficiency of the dye-house wastewater can reach 90% and the color stripping efficiency can reach 78%.
应用实验结果表明,在室温下,当高取代度阳离子淀粉的加入量在200~300 mg/L,印染废水的pH值为11时,该阳离子淀粉对实际印染废水的脱色率能够达到78%,COD去除率能达到90%。
6) COD removing rate
COD去除率
1.
The magnitude orders of the degrading rate and COD removing rate of phenol in wastewater under the condition of 1 g/L Mn oxides and 4 hours are decreased from cryptomelane(97.
结果表明,氧化锰矿物在无UV时对苯酚的降解能力差异大,1 g/L的氧化锰4 h对200 mg/L苯酚废水的降解率和COD去除率分别为:锰钾矿97。
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