查询词典 cod

The sulfate-reducing-bacteria were immobilized in polyvinyl alcohol to treat wastewater containing zinc. The effects of different crosslinking reagents on the conglobation, cohered efficiency of the carbon source, reduction ratio of sulfate, removal ratio of Zn, and COD of drainage were considered.

摘 要：以聚乙烯醇为包埋介质，对硫酸盐还原菌进行固定化处理；以含锌废水为处理对象，考察不同交联剂对成球性能影响、营养源内聚效果、硫酸盐还原效果、锌离子去除率和出水COD等因素。

But, because of the complexity of the dye molecule, there has been short of detailed comprehension in its photocatalytic degradation process. The key problem is difficult to detect the intermediates clearly. In this paper, the photocatalytic degradation of azo dye Congo red in water solution was investigated on UV irradiating TiO2 in the homemade reactor. The optimization conditions were determined and then the rate of decolorization, COD decrease, yield of CO2 and varies pH of aqueous solution during illumination were detected; The varies of the possible intermediates during degradation process were monitored with UV-VIS spectrum and HPLC. The possible mechanism of Congo red photocatalytic degradation is discussed combined with the data of MS.

本文选择有代表性的常见偶氮染料—刚果红作为研究对象，以自制TiO2为催化剂和小功率紫外灯为光源，在自制光反应器上确定了光催化降解的优化条件，并在这个优化条件下测定了降解过程中的脱色率、COD去除率和CO2生成量；利用数显酸度计、紫外可见分光光度计和高效液相色谱仪跟踪测定了降解过程中的可能产物，并结合质谱的数据初步探讨了刚果红的可能降解机制。

Therefore, we studied two levels of biochemistry processing water leakage again in turn after the ozone tower, the ceramic filter the tower and the activated charcoal tower union depth processing craft again, this place principle craft its COD remove rate was 72.8%, anionic surfactant medicinal preparation remove rate was 90.9%, petroleum class remove rate was 78.8%, the total phosphorus and total nitrogen remove rate separately was 73.8% and 82.7%, the final water leakage might directly use in the city afforests, flushes the restroom, eliminates and washes the vehicle and so on, had the good environment, the society and the economic efficiency.

为此，我们又研究了二级生化处理出水再依次经过臭氧塔、陶滤塔与活性炭塔的联合深度处理工艺，该处理工艺其COD去除率为72.8%，阴离子表面活性剂去除率为90.9%，石油类的去除率为78.8%，总磷和总氮的去除率分别为73.8%和82.7%，最后出水可直接用于城市绿化、冲厕、扫除及洗车等，具有良好的环境、社会和经济效益。

The concentration of volatile compounds and the COD value of condensed water were also influenced by the hydrolysis and decarboxylation in this process.

实验结果表明，污泥在干燥过程中会释放出氨气、挥发性有机酸和烷烃等挥发性有机污染物，且升高温度能够降低干燥机出料含水率，并能够通过影响水解及脱羧反应从而增加干燥过程排放的气体量及冷凝水的COD值。

The photocatalytic properties of these samples were detected by decoloration rate of methyl orange solution and COD.

通过测试甲基橙溶液的脱色率和COD去除率对复合光催化剂的光催化活性进行了评价。

In addition, we investigate the change between the removal rate of COD and different deflector spacings in the channel of the membrane bioreactor.

本论文还研究了不同折流间距的反应器槽道对COD降解情况的影响。

The results were in good agreement with those from the conventional COD methods, i.e ., permanganate and dichromate ones.

将该方法用于实际水样的检测，测定结果与COD标准分析法有较好的一致性。

Potassium dichromate was replaced by ceric sulfate as oxidant to determine the COD in this study.

采用硫酸高铈作为氧化剂来测定难降解垃圾渗滤液的COD，测定结果与重铬酸钾法进行比较。

In the calculation of COD and DO, the atmosphere oxygen resume equation and coefficient considered the molecule diffuseness and turbulence diffuseness are successfully exercised, and made a better result.

其中，COD、DO的计算中，成功的运用了本文建立的考虑了分子扩散和紊动扩散两种因素的大气复氧方程和大气复氧系数计算公式，取得较好的结果。

Since COD reduction is stoichiometrically related to methane production, the anaerobic digester performance can be easily calculated.

由于从化学论量上讲，COD的降解于甲烷产量有关，因此厌氧性消化装置的性能可以很容易地计算出来。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。