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以实验室制备的羟基氧化铁（FeOOH）为催化剂催化臭氧氧化处理苯胺废水,对比催化臭氧氧化与单独臭氧降解苯胺的效率,实验结果表明,FeOOH催化臭氧氧化能加快对苯胺的降解速率,并且矿化程度高.说明FeOOH对臭氧氧化水中的苯胺具有明显的催化作用.探讨了氧气的进气流量、苯胺的初始浓度、水溶液的pH、催化剂的投加量等因素对催化氧化苯胺的影响.研究表明：氧气的进气流量为30L/h、初始浓度300mg/L时、pH值7.3、催化剂的投加量为2g/L、反应15min后,苯胺的去除率可达98.2%,COD的去除率可达70%.在催化体系中加入自由基捕获剂叔丁醇后,催化臭氧氧化反应明显受到抑制,间接证明了FeOOH催化臭氧氧化苯胺遵循自由基反应机理. 相似文献
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以半导体材料二氧化钛为催化剂,对偶氮染料甲基橙溶液进行了电催化氧化降解实验;考察了催化剂量、槽电压、pH值、电解质浓度、反应时间等因素对处理效果的影响.实验结果表明:二氧化钛的催化效果显著,其色度和COD去除效果可比无催化剂时效果分别提高35%和28%;去除机制主要是电催化体系中产生的·OH对有机物的氧化、降解. 相似文献
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采用Fenton法处理弱酸艳红B染色废水。通过单因素实验和正交实验,研究反应温度、初始pH值、H2O2和FeSO4投加量及反应时间对色度和COD去除率的影响。结果表明,各因素对COD去除率的影响从大到小依次为：反应温度〉pH值〉H2O2投加量〉FeSO4投加量。而处理废水的最佳条件为：反应温度50℃、初始pH值为2．5、30％H2O2投加量为5mL／L、FeSO4投加量为500mg／L、反应时间为90min。在此条件下,废水色度去除率为99．0％,COD去除率为74．2％。 相似文献
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章介绍了具有合成H2O2和光催化性能的双功能新型复合电极，并用X－射线衍射，SEM等方法进行了表征，双功能复合电极是将TiO2/C光催化剂负载在具有合成H2O2性能的新型载体上形成的，在光反应器中，复合电极作阴，钌－钛不溶性电极作阳极，低压汞灯作光源，实现了光化学氧化与光催化氧化在同一电极／溶液界面上的联合作用，实验结果表明，复合电极对提高偶氮染料分子活性艳红（K－2BP）的氧化降解速度起到了重要作用，仅反应3min，脱色率可达49％，80min，偶氮染料分子可降解47％。 相似文献
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采用价廉的涤纶滤膜作为电解体系隔膜,利用阴、阳极同时作用降解含酚工业废水,在反应时间80min,曝气量1.2L/min,电流密度30mA/cm2的最佳条件下,含酚废水COD去除率可达到80%,阴极室COD去除率高于阳极室。 相似文献
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以硫酸铝铁溶液为絮凝剂,高锰酸钾溶液为氧化剂,采用氧化絮凝的方法处理活性大黑染料废水,考察了絮凝剂与氧化剂用量比、絮凝时间、温度、pH等对脱色率和CODCr去除率的影响,确定最佳条件：絮凝剂与氧化剂的摩尔比为3.45∶0.14,pH=1,θ=30℃,絮凝时间t=1 h,脱色率可达99.13%,CODCr去除率达66.81%.如果采用两段处理法,脱色率可进一步提高到99.88%,CODCr去除率达85.13%.砖末二次吸附后,脱色率达99.24%,CODCr去除率达77.05%. 相似文献
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费伟胜 《湖南广播电视大学学报》2005,(2):85-87
经过对环己酮生产副产物皂化废碱液中和、分层和分离、蒸馏，提取油相中的无水馏分，用无水馏分作萃取剂萃取废碱液中和、分层和分离后的污水等过程，降低污水中有机酸含量，能使处理后的污水达到COD指标，消除同类技术中存在的萃取剂的醇酸酯化、萃取效率逐步降低的缺陷，在减少环境污染的同时，达到了提高原料利用率、以废治废、综合利用的目的。 相似文献
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为探索EM菌在淡水水质净化处理中的作用,以不同的EM菌液浓度（VEM/V污水为0‰、0.1‰、0.5‰、1‰、5‰）在有氧通风、常温条件下处理天心湖水样,通过测定湖水样处理前后的pH、SS、色度、COD和氨氨水平变化,评价EM菌对淡水水质的处理效果,研究结果表明：浓度为0.1‰的EM菌液处理对天心湖水的COD去除效果最佳;浓度为1‰的EM菌液对天心湖水的氨氮去除效果最佳;浓度为5‰的EM菌液处理使湖水COD、氨氮水平升高,水质反而受到污染.通过选择EM浓度、处理时间、处理温度三个影响因素,按L9（34）正交表进行正交实验,结果表明EM处理天心湖水的最佳工艺条件是：处理时间7d、处理温度30℃、EM浓度0.2‰,对COD的去除率达到36.52％;按上述正交实验最佳工艺条件进行验证实验,结果表明,对天心湖水中COD的去除率可达到35.47％,对生活污水处理COD去除率可达41.18％.本实验可为进一步研究EM在水质处理上的应用提供参考. 相似文献
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催化氧化法处理造纸废水 总被引：1，自引：0，他引：1
本文以低浓度次氯酸钠为氧化剂,三氧化二镍为催化剂对造纸工业废水中高浓度COD的去除进行了研究,探讨了影响COD去除率的各种因素。在PH=6～7,反应时间为50分钟,室温下处理废水中较高浓度的COD,去除率达到95％以上,结果令人满意。 相似文献
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论述了总有效容积2000m3的新型UASB装置,在中温条件下处理高浓度木薯酒精废水的启动运行和污泥含量控制的过程．当反应器稳定运行时,容积负荷可达7kgCOD／（m3·d）,水力停留时间为2d,污泥保持量在30％-41;％,COD去除率达95％以上,出水COD小于500mg／L． 相似文献
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改性凹凸棒石对景观河水的净化研究 总被引：1，自引：0，他引：1
通过酸、十六烷基三甲基溴化铵（HDTMA）、NaCl、Al2（SO4）3及NaCl-Al2（SO4）3分别改性凹凸棒石,考察其及原土助凝（聚合氯化铝）PAC净化景观河水的效果。结果表明：当PAC投量为60 mg/L时,HDTMA改性凹凸棒石助凝净化COD的效果最好,去除率高达84%;Al2（SO4）3改性凹凸棒石助凝净化TP的去除率最高,达99%;各种凹凸棒石助凝净化NH4＋-N的效果相差不大;NaCl-Al2（SO4）3改性凹凸棒石助凝净化后的浊度去除率最高,达97%。投加原土及各种改性凹凸棒石后,相对于单独使用PAC混凝处理,沉淀污泥体积都大幅度减小,降低了后续污泥处理难度。 相似文献
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A novel fluidized electrochemical reactor that integrated advanced electrochemical oxidation with activated carbon (AC) fluidization in a single cell was developed to model pollutant p-nitrophenol (PNP) abatement. AC fluidization could enhance COD removal by 22%-30%. In such a combined process, synergetic effects on PNP and COD removal was found, with their removal rate being enhanced by 137.8% and 97.8%, respectively. AC could be electrochemically regenerated and reused, indicating the combined process would be promising for treatment of biorefractory organic pollutants. 相似文献
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A novel fluidized electrochemical reactor that integrated advanced electrochemical oxidation with activated carbon (AC) fluidization in a single cell was developed to model pollutant p-nitrophenol (PNP) abatement. AC fluidization could enhance COD removal by 22%-30%. In such a combined process, synergetic effects on PNP and COD removal was found, with their removal rate being enhanced by 137.8% and 97.8%, respectively. AC could be electrochemically regen erated and reused, indicating the combined process would be promising for treatment of biorefractory organic pollutants. 相似文献
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林峥嵘 《闽西职业技术学院学报》2006,8(3):115-118
造纸黑液厌氧塘-化学混凝工艺研究结果表明,厌氧塘作为造纸黑液的初级处理,在有机负荷率为0.2～0.8kg/m2.d时,COD去除率为30～42%,木质素去除率为40～50%;塘出水后处理采用化学混凝法,在泥浆投加量为2.45g/L(提高塘出水的SS),FeCl3投加量为0.91g/L时,COD和色度的去除率分别为84%和94%,最终出水可达到造纸行业的排放标准。 相似文献
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朱蕾 《渭南师范学院学报》2014,29(19):34-38
在处理制革废水中常用SBR工艺,试验探讨了不同HRT、进水pH、COD负荷、NH3-N浓度、活性污泥浓度的运行参数,研究SBR工艺处理制革废水的最优运行参数．结果表明：SBR反应器在进水COD为1500～2000mg／L、NH3-N为150～250mg／L、pH为7．5、运行污泥浓度在3．0g／L左右、曝气时间为18h时COD去除率能达到95％左右,NH3-N去除率达到97％左右,其出水能够达到一级出水标准． 相似文献
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A novel fluidized electrochemical reactor that integrated advanced electrochemical oxidation with activated carbon (AC) fluidization
in a single cell was developed to model pollutant p-nitrophenol (PNP) abatement. AC fluidization could enhance COD removal by 22%–30%. In such a combined process, synergetic
effects on PNP and COD removal was found, with their removal rate being enhanced by 137.8% and 97.8%, respectively. AC could
be electrochemically regenerated and reused, indicating the combined process would be promising for treatment of biorefractory
organic pollutants.
Project (No. 20306027) supported by the National Natural Science Foundation of China 相似文献
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Aerobically activated sludge processing was carried out to treat terylene artificial silk printing and dyeing wastewater (TPD wastewater) in a lab-scale experiment, focusing on the kinetics of the COD removal. The kinetics parameters determined from experiment were applied to evaluate the biological treatability of wastewater. Experiments showed that COD removal could be divided into two stages, in which the ratio BOD/COD (B/C) was the key factor for stage division. At the rapid-removal stage with B/C>0.1, COD removal could be described by a zero order reaction. At the moderate-removal stage with B/C<0.1, COD removal could be described by a first order reaction. Then Monod equation was introduced to indicate COD removal. The reaction rate constant (K) and half saturation constant (KS) were 0.0208-0.0642 L/(gMLSS)·h and 0.44-0.59 (gCOD)/L respectively at 20 ℃-35 ℃. Activation energy (Ea) was 6.05×104 J/mol. By comparison of kinetic parameters, the biological treatability of TPD wastewater was superior to that of traditional textile wastewater. But COD removal from TPD-wastewater was much more difficult than that from domestic and industrial wastewater, such as papermaking, beer, phenol wastewater, etc. The expected effluent quality strongly related to un-biodegradable COD and kinetics rather than total COD. The results provide useful basis for further scaling up and efficient operation of TPD wastewater treatment. 相似文献