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废水cod     
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  cod
     Under stable operation condition , the average removal of COD was 26% in the UBF reactor with HRT of 66 9 h and OLR of 0 65~0 75 kgCOD·m 3 d 1 .
     UBF反应器稳定运行时,在HRT为66 9h,OLR为0 65~0 75kgCOD·m-3d-1的条件下,焦油废水COD平均去除率达到26%。
短句来源
     The effect of H_2O_2/Fe~(2+) and H_2O_2/Fe~(3+) on removal efficiencies of COD and colority for FN-2BL red,C-R blue,and C-2R yellow wastewater was first systematically investigated in this paper.
     论述了H2O2/Fe2+和H2O2/Fe3+对商业染料活性红(FN-2BL red)、活性蓝(C-R blue)和活性黄(C-2R yellow)废水COD和色度的去除效果.
短句来源
     A new rapid determination method of waste water COD in mixed acid solutionH_2SO_4-H_3PO_4,with Mn(H_2PO_4)_2 as catalyst,has been proposed in this paper.
     本文提出用Mn(H_2PO_4)_2作催化剂,在H_2SO_4-H_3PO_4混酸溶液中快速测定废水COD的新方法。
短句来源
     The result shows that when the processes are used to the activated sludge process, SBR process and A/A/O process, they can reduce the COD of 800 mg/L to 305 mg/L, 221 mg/L and 185 mg/L respectively and can also reduce the influent of NH3 - N from 45 mg/L to 9.7 mg/L, 14 mg/L and 13.3 mg/L respectively.
     实验结果表明,该技术应用于活性污泥法、SBR工艺和A-A-O工艺中,能使焦化废水COD由进水平均800mg/L分别降至305mg/L、221mg/L和185mg/L,氨氮由进水平均45mg/L分别降至9.7mg/L、14mg/L和13.3mg/L。
短句来源
     Probing into the correlation of COD and BOD_5 in wastewater
     废水COD与BOD_5相关特性的初探
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  effluent cod
     A project of distillery wastewater treatment with EGSB and CASS reactors is introduced in this paper. When influent COD was about 12000 mg/L,the effluent COD from this treatment system is below 100 mg/L,meeting the national discharge standard and providing a reference for similar wastewater treatment.
     介绍了采用EGSB+CASS工艺处理酿酒废水的工程实例,废水COD浓度在12000mg/L左右时,经本工艺处理后出水COD浓度小于100 mg/L,达到国家排放标准,为类似废水的处理提供借鉴经验。
短句来源
     The Bleaching of Mechanical Pulp with a Lower Effluent COD Load
     降低废水COD负荷的机械浆漂白
短句来源
     Peroxide bleaching of mechanical pulp requires alkaline conditions,which cause an increase of the effluent COD.
     机械浆H2O2漂白要求在碱性条件下进行,会引起废水COD增高。
短句来源
     The study was on the treatment of wastewater of frozen food processing by air floatation +bio-contact oxidation. The study results show that the effluent COD can meet the national discharge standards; with more than 97% removal rate.
     通过气浮+生物接触氧化工艺处理速冻食品加工废水的实验、设计和工程运行,结果表明:废水COD去除率能达到97%以上,使得最终出水的COD<100mg/l。
短句来源
     In this paper the main mechanisms of eliminating COD and LAS in the wastewater of synthetic detergent by electrolytiv locculation treatment were studied. The primary technological conditions for the electrolytic flocculation treatment, which makes the effluent COD be able to meet the national effluent standard,were determined.
     本文研究了电絮凝处理合成洗涤剂废水COD和LAS的主要机理,确定了电絮凝处理的主要工艺条件,使出水COD达国家排放标准.
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  wastewater cod
     A new rapid determination method of waste water COD in mixed acid solutionH_2SO_4-H_3PO_4,with Mn(H_2PO_4)_2 as catalyst,has been proposed in this paper.
     本文提出用Mn(H_2PO_4)_2作催化剂,在H_2SO_4-H_3PO_4混酸溶液中快速测定废水COD的新方法。
短句来源
     A RAPID DETERMINATION METHOD OF WASTE WATER COD WITH Mn(H_2PO_4)_2 AS CATALYST
     用Mn(H_2PO_4)_2作催化剂快速测定废水COD
短句来源
     The result indicates this law can make Coking and Chemistry Plant two sink pool waste water COD drop,from 348.3mg/L to 52.1mg/L and the removal rate up to 85.0%.
     结果表明该法可使焦化厂二沉池废水COD从348.3mg/L降至52.1mg/L,COD的去除率可达85.0%以上.
短句来源
     For coagulation,wastewater pH is 7-8,the dosage of H2O2 is 200mg/L and the mass ratio of H2O2 to O3 is 0.5.After treatment,the wastewater COD is reduced from 860mg/L to 145mg/L with 83.1% of COD removal rate. The effluent quality can meet the second grade of national discharge standards.
     催化氧化实验,废水pH为7~8、H2O2加入量为200mg/L、H2O2与O3的质量比为0.5。 处理后,废水COD从860mg/L降至145mg/L,COD去除率达83.1%,出水水质达到国家二级排放标准。
短句来源
     The iron carbon internal electrolysis technology was used in pretreatment of avermectin wastewater. When the wastewater COD was 31600 mg/L,pH was 7.3 and avermectin mass concentration was 204 μg/L,and under the optimum conditions of 30 min of reaction time,1∶1 of the ratio of Fe to C and pH 8~9 for coagulation,the COD removal rate reached 19.5% and that of avermectin reached 68.5%.
     采用铁炭内电解预处理阿维菌素废水,当原水pH为3.7、COD为31600mg/L、AVM含量为204μg/L时,最佳工艺条件为铁炭比1∶1、停留时间30min、混凝pH8~9时,废水COD和AVM的去除率分别达到19.5%和68.5%,为后续生化处理创造了有利条件。
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  cod in wastewater
     A new procedure for the determination of COD in wastewater in the medium of H2SO4 and H3PO4 with CuSO4 as catalyst is developed.
     本文提出用CuSO4作催化剂,在H2SO4-H3PO4溶液中,重铬酸钾回流测定废水COD的方法。
短句来源
     The method is appropriate especially to the determination of COD in wastewater whose the Cl~- concentration is more than 5,000mg/l.
     此法尤其适用于Cl~-含量大于5,000mg/l的废水COD测定。
短句来源
     Improvement of Spectrophotometry for Quick Determination of COD in Wastewater
     分光光度法快速测定废水COD的改进
短句来源
     Study on Improvement of Determination of COD in Wastewater
     重铬酸钾法测定废水COD条件改进的研究
短句来源
     Research on quick determination of COD in wastewater
     废水COD快速测定方法研究
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  cod
The corresponding degradation ratio of RhB reached up to 99.4% and COD reduced 77.4%.
      
It had been found from the flocculation of disposed water with algae from Dianchi Lake that the transparency and COD elimination reach to 93.5% and 70.3%, respectively, with 15 mg/L PSOAMDA and at pH 6, vs.
      
Long-term sampling and analysis were conducted in a domestic wastewater treatment plant for the investigation on the characteristics of the representative contaminants in raw sewage such as SS, COD, BOD5, TP, and TN.
      
As a result, almost 100% of the SS was found to be suspended matter, as well as about 65% of COD, 60% of BOD5, 50% of P, and 20% of N.
      
Even at low temperature (t = 13°C), chemical oxygen demand (COD) and total nitrogen (TN) in the effluent were under 50 and 5 mg/L, respectively.
      
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  effluent cod
The produced anaerobic effluents were shown to be efficiently posttreated aerobically: final effluent COD concentrations were about 0.1 g/L.
      
For glucose, yeast extract addition caused higher gas production and lower effluent COD.
      
Initial settling time of 2?min resulted in the loss of a substantial amount of biomass as wash-out and high effluent COD concentrations within the first week of operation.
      
A pseudo first order equation described the relationship of COD removal rate with the effluent COD.
      
The results lead to a design organic load of 20?gCOD/m2?d to reach an effluent COD under 50?mg/l.
      
更多          
  wastewater cod
The wastewater COD level was 2000-3000 mg/L in simulation of real textile waste-water.
      
The electrochemical mineralization of organic pollutants is a new technology for treatment of dilute wastewater (COD?>amp;lt; 5?g?L-1).
      
The wastewater COD values after phenol extraction and solvent recovery with the four solvents are presented in Table 5.
      
The effect of varying the wastewater COD concentration was examined in the anaerobic environment.
      
The effects of varying wastewater COD concentration and nitrate concentration were examined in the anoxic environment.
      
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  cod in wastewater
The method was successfully applied to the determination of COD in wastewater samples.
      
Additionally, TSS and COD in wastewater were considerably higher because the main activity in the area is the production of typical Mexican food.
      
  其他


The study on characteristics of thermomechanial pulping effluents indicates that the contents of COD and total carbohydrates in this effluents are more than 5000mg/1 and 3000mg/1 respectively and that hexose are dominant constituents and that free sugars are present in significant amounts. The contents of total solid and total volatile solid are similar to those in the composition of a machine effluent from a strawboard mill, while the solid content in TMP white water is rather low. A high percentage reduction...

The study on characteristics of thermomechanial pulping effluents indicates that the contents of COD and total carbohydrates in this effluents are more than 5000mg/1 and 3000mg/1 respectively and that hexose are dominant constituents and that free sugars are present in significant amounts. The contents of total solid and total volatile solid are similar to those in the composition of a machine effluent from a strawboard mill, while the solid content in TMP white water is rather low. A high percentage reduction in COD (about 80 percent) was obtained in an anaerobic flow system with a partial recycle flow under the conditions of an organic loading of 6-7kg/m3d in terms of COD, a retention time of 24 hours, and a temperature of 34-36°C. The content of CH4 in the biogas is more than 80%.

对一种针叶材TMP废水的化学特性进行了研究,结果表明:该项废水的COD>5000毫克/升,总碳水化合物含量为3.207毫克/升,组成以己糖为主占80%,戊糖量少,并含有一定数量的游离还元糖。其总固物和挥发性总固物等和草浆板废水相似,悬固物很少。甲烷发酵试验表明,该废水适于厌氧处理。甲烷发酵主要条件是体积COD负荷 6—7公斤/米~3天,温度34—36℃,部分回流,滞留时间24小时左右。在此条件下COD除去率可达80%左右,甲烷占所产气体的80%以上。

The correlation of COD and BOD_5 is linear in wastewater, COD=a+b BOD_5. There b <1, and the better the biodegradability is, the smaller b is. The value of b can be used as a index to judge the biodegradability of wastewatero According to the values of a and b for the specific wastewater, the reason why the biodegradability is poor can be found.

从理论分析及实际数据统计证明,废水的COD及BOD_5是有(?)线性相关关系,COD=a+b BOD_5,其中,b<1。生化性越好,b值就越小,它可以作为判断废水可生化性的指示。通过a,b值的分析,可以找出废水可生化性差的原因。

The granulation of the sludge in 2 lab—UASB reactors of 21 1 volume each at 35±1℃ was investigated,with c rude glucose solution and brewery wastewater as substrates and sludge taken from an Imhoff tank as seed sludge.The Process of granulation was described:the stage of start- up,the stage of appearance of granules and the stage of fomation of granules.The specific gravity,the components,the settleability,the methanogenic activity,the effect of temperature on the activity and the coenzyme F_(420) content of...

The granulation of the sludge in 2 lab—UASB reactors of 21 1 volume each at 35±1℃ was investigated,with c rude glucose solution and brewery wastewater as substrates and sludge taken from an Imhoff tank as seed sludge.The Process of granulation was described:the stage of start- up,the stage of appearance of granules and the stage of fomation of granules.The specific gravity,the components,the settleability,the methanogenic activity,the effect of temperature on the activity and the coenzyme F_(420) content of the sludge were investigated.The granular sludge cultivated had diameter ranging from 0.1 to 2mm,with specific gravity of 1.05 and SVI of 21 ml /gVSS.Its methanogenic activity and coenzyme F_(420) were found to be 1.2—1.9 kg COD/kg VSS.d and 0.13—0.29 mole/gVSS respectively.When the 1ab—UASB reactor with granular sludge was used to treat brewery wastewater,a COD loading up 30kg/m~3.d was achjeved with COD remo- val of 90% within 3 hours.Methanothix,Methanobacterium,Mathococs and Methanosarcina were found in the sludges.The main factors for cultivation of granular sludge were discussed as follows:a)COD lcadlng higher than 0./kgVSS.d,b)hydraulic loading up to 0.4m~3/m~2·h c)having adequate nutrients,pH 6.5—7.2 and temperature 35—40℃,and d)discharge of bulking floc sludge.The suggestions nenticned abeve were verified by the experinents and granulation was completed within 70 days.

本文叙述了容积21升的小型厌氧升流式污泥层(UASB)反应器内污泥在35±1℃下的颗粒化过程。进料分别用工业葡萄糖液和啤酒厂废水,接种污泥用双层沉淀池消化污泥。颗粒污泥的培养过程可分为三个阶段:启动运行阶段、颗粒污泥出现阶段和颗粒污泥成熟阶段。颗粒污泥直径约0.1~2毫米,比重约1.05,在反应器中的 SVI 为21毫升/克 SS,最大 COD 去除速率为1.2~1.9克 COD/克 VSS·日,辅酶 F_(420)含量在0.13~0.29微摩尔/克 VSS,有很好的沉降性能和产甲烷活性。污泥颗粒化后的反应器处理啤酒厂废水的 COD 容积负荷达30公斤/米~3·日,COD 去除率90%左右,水力停留时间可至3小时。颗粒污泥的 VSS/SS 可高迟0.85,含有铁、镍和锌等元素。作者认为中温条件下培养颗粒污泥的基本条件有:(1)COD 污泥负荷大于0.6克 COD/克 VSS·日;(2)表面负荷大于0.4米~3/米~2·时;(3)有适当的营养物、存在微量元素和无抑制物,pH6.5~7.2和35~40℃培养温度;(4)排除沉降性差的絮状泥。

 
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