Fenton氧化法深度处理垃圾渗滤液

为了去除垃圾渗滤液中难于生物降解的有机物,采用Fenton氧化法深度处理垃圾渗滤液。得出试验最佳反应条件为:H2O2和Fe2+不混合分3次投加,H2O2和Fe2+的质量比为2∶1,Fe2+的浓度为0.04mol/L。在最佳条件下,进水CODCr的质量浓度为1521mg/L时,反应3h,出水CODCr的质量浓度为120mg/L,可以达标排放。药剂费用估算为6元/t。     

臭氧Fenton氧化深度处理合成氨工业废水实验研究

分别采用臭氧氧化和Fenton氧化工艺对合成氨工业废水生化处理后的排放尾水进行深度处理实验研究。结果表明,尾水COD为48 mg/L,BOD5为8 mg/L,当臭氧氧化反应进行120 min后,出水COD最低,为41 mg/L,去除率为14.58%,B/C由0.16提高到0.31。在n(Fe2+)∶n(H2O2)=20.38时,Fenton氧化出水COD为18 mg/L,COD去除率达到64.58%,满足深度处理排放标准要求。研究结果表明Fenton氧化可以作为该尾水的深度处理工艺。     

Supercritical water oxidation of flammable industrial wastewaters: economic perspectives of an industrial plant

BACKGROUND: Supercritical water oxidation (SCWO) is a promising technology that respects the environment, destroys wastes and allows energy recovery. This process has been applied to many model compounds and real wastewaters at laboratory scale. However, SCWO treatments at pilot plant scale of real wastewaters are scarce. The application of this technology to industrial wastewaters has drawbacks such as corrosion, salt deposition and high cost, so industrial scale‐up has been delayed. RESULTS: In a first stage, for safety reasons the feasibility of SCWO applied to flammable industrial wastewaters was evaluated at laboratory scale in an isothermal plug flow reactor with low concentrations (3–10 g COD L^?1), at a constant pressure of 250 bar and at different temperatures in the range 350–500 °C. In a second stage, experiments were conducted with much higher concentrations (20–90 g COD L^?1) in a SCWO reactor at pilot plant scale. Experiments at pilot plant scale demonstrated the possibility of working under autothermal conditions and the results were used to estimate the treatment costs for a SCWO plant with a capacity of 1 m³ h^?1. CONCLUSION: Results demonstrated the technical feasibility of using a SCWO process to treat flammable industrial wastewater at pilot plant scale due to the absence of operational drawbacks related to the flammability of this wastewater, such as plugging, pressurization or preheating problems and uncontrolled reactions (explosion, etc.). The economic feasibility was demonstrated, especially bearing in mind the energy recovery optimization. Copyright © 2011 Society of Chemical Industry     

芬顿催化氧化法在焦化废水处理中的应用

针对芬顿催化氧化工艺存在的问题进行了原因分析,在药品选择、药品投加方案、投加条件、刮泥机运行时间、pH值调节、混凝沉淀池增加挡板等方面进行改进。将芬顿催化氧化法应用到净化焦化废水中,出水指标达到国家一级排放标准。     

高级氧化技术处理制药废水研究进展

本文综述了高级氧化处理技术在制药废水污染防治中的应用,对各种制药废水处理技术的特点及其在国内外研究的状况进行了讨论,探讨了污染防治中存在的问题及解决办法,最后对高级氧化技术处理制药废水的研究进行了展望.     

Mn-沸石催化剂的制备及其对Fenton工艺处理垃圾渗液催化氧化效果研究

以沸石为载体,硝酸锰为改性剂制备了负载型Mn-沸石催化剂,采用SEM和BET法对制备的催化剂进行了表征。采用Fenton工艺处理垃圾渗滤液原液,通过正交实验和单因素实验考察了Mn-沸石催化剂对Fenton法处理生活垃圾渗滤液的影响。结果表明,一定量的生活垃圾渗滤液,投加1 mL 30%H2O2,H2O2/Fe2+摩尔比为4∶1、pH为4,加入1 g Mn-沸石催化剂,CODCr去除率可高达90.25%。     

Fenton氧化法处理含乌洛托品废水

通过实验优化了Fenton试剂法氧化处理含乌洛托品废水的反应条件。实验表明,当ρ(H2O2)=8.25g/L,n(H2O2)∶n(Fe)=20∶1,pH=3.0,在35℃下反应5h以后,CODCr可从1250mg/L降到<100mg/L。但当温度降低到15℃时,出水CODCr则很难降到<100mg/L。在同样的反应条件下,连续流完全混合反应器的出水CODCr明显高于间歇反应的出水。     

Fenton氧化处理彩色液晶单体合成工业废水

用Fenton法处理彩色液晶单体合成废水,以降低对微生物的毒性,提高可生化降解性。考察了H2O2用量、Fe2+用量、反应时间对处理效果的影响。结果表明,最优的反应条件为:pH值2.1,H2O2浓度0.44 mol/L,Fe2+浓度0.5 mol/L,反应时间150 min,COD、H2O2、Fe2+物质量的比值为1∶1.77∶2.01。在此条件下,COD的平均去除率可达91.2%,BOD/COD由0.179升至0.542,可满足后续生化处理的要求。     

生物接触氧化法处理氯碱化工污水

介绍了接触氧化法处理氯碱化工污水的特点及污水场的工艺、运行情况。     

Fenton氧化技术处理难降解工业有机废水研究进展

系统地分析了各种Fenton氧化技术对有机污染物的降解机理,概述了Fenton氧化技术在处理化工废水、印染废水、制药废水、农药废水和含油废水等难降解工业有机废水中的应用研究进展,认为拓宽Fenton氧化体系的pH响应范围,开展Fe2 /Fe3 固定化技术研究是今后的研究重点,Photo-Fenton和E1ectro-Fenton将是今后Fenton氧化体系的两大发展方向.     

Fenton高级氧化法深度处理焦化生化废水的实验研究

采用硫酸亚铁和过氧化氢所构成的Fenton试剂,对经生化处理后的焦化废水进行Fenton高级氧化深度处理,重点考察了废水初始pH,FeSO4·7H2O、H2O2及PAM投加量对焦化生化废水处理效果的影响。结果表明,采用Fenton高级氧化法可使经生化处理后的焦化废水中的COD、NH3-N和色度得到进一步有效去除。对于中等浓度的焦化生化废水,较适宜的Fenton氧化工艺条件:废水初始pH为8~10,FeSO4·7H2O投加量为500 mg/L,H2O2投加量为3.5 mL/L,PAM投加量为4.0 mg/L。在此条件下,COD、NH3-N和色度的去除率分别可达85.9%、97.3%和84.6%。     

微波强化Fenton氧化法深度处理抗生素废水研究

采用微波强化Fenton氧化法对抗生素废水二级处理出水进行深度处理,通过正交试验和单因素试验得出最佳反应条件为:初始pH为3.0～4.0、H2O2投加量为5 mL/L、n(Fe2+)∶n(H2O2)为1∶10、微波功率为625 W。当抗生素废水二级出水COD为502～516 mg/L时,反应时间6 min,处理出水COD<120 mg/L,COD去除率达到78.0%以上,处理后出水水质满足《发酵类制药工业水污染物排放标准》(GB 21903—2008)。     

响应面法优化Fenton氧化处理高浓度废乳化液

采用Fenton氧化法对高浓度废乳化液处理进行了研究,基于Box-Behnken响应面法,考察了初始pH、FeSO_4·7H_2O加入量、H_2O_2加入量的单独作用和交叉作用,并建立了COD去除率数学模型,结果表明:影响因子显著性FeSO_4·7H_2O加入量初始pHH_2O_2加入量,初始pH与H_2O_2加入量的交叉作用显著;数学模型回归性较好,预测最佳COD去除率为89.46%。确定了Fenton氧化最佳条件为:初始pH为4.1,FeSO_4·7H_2O加入量为22 mmol/L,H_2O_2加入量为636 mmol/L,验证试验结果为89.11%,与拟合的二次回归模型预测值基本相符。     

Fenton氧化法处理填埋渗滤液

Central composite design (CCD), the most popular design of response surface methodology (RSM), was employed to investigate the effect of total organic carbon (TOC) ratio of high molecular weight organic matter (HMW) to low molecular weight organic matter (LMW), the LMW strength and molar ratio of hydrogen peroxide to ferrous ion on landfill leachate treatment by Fention process. Based on the experimental data, a response surface quadratic model in terms of actual factors was obtained through analysis of variance (ANOVA). The model showed that TOC removal increased with the increase of HMW to LMW ratio and the decrease of LMW strength. There existed an optimal hydrogen peroxide to ferrous ion molar ratio for TOC removal.     

Enhancement of biodegradability of industrial wastewaters by chemical oxidation pre‐treatment

Chemical oxidation technologies are often employed for the treatment of complex industrial effluents that are not amenable to conventional biological methods. The role of chemical oxidation depends on the treatment objectives and may vary from partial remediation to complete mineralization. In the case of partial treatment, chemical oxidation aims at the selective removal of the more bioresistant fractions and their conversion to readily biodegradable intermediates that can subsequently be treated biologically. Coupling chemical pre‐oxidation with biological post‐treatment is conceptually beneficial as it can lead to increased overall treatment efficiencies compared with the efficiency of each individual stage. This paper reviews recent developments and highlights some important aspects that need to be addressed when considering such integrated schemes. Copyright © 2004 Society of Chemical Industry     

微波强化Fenton氧化法处理垃圾渗滤液研究进展

对目前微波强化Fenton法处理垃圾渗滤液的研究结果进行了综述,并对结果进行了分析比较。在微波Fenton法处理垃圾渗滤液的过程中,微波的热效应是起主要作用。影响垃圾渗滤液处理效果因素有pH值、微波辐射功率和时间及Fenton试剂,对不同垃圾渗滤液进行处理,各因素的影响有差异,本文对造成这些差异的原因进行了初步探讨。结合当前研究成果,探讨了微波强化Fenton氧化法可能的应用。     

Fenton氧化法处理炼化企业二级出水的研究

通过检测·OH间接生成率与COD去除率考察了Fenton氧化法深度处理炼化企业二级出水的效果及影响因素。结果表明,采用Fenton氧化法处理炼化企业二级出水,处理后的出水各项指标均达到《城市污水再生利用工业用水水质》(GB/T 19923—2005)的要求。最佳反应参数为:H2O2投加量为4 mmol/L,FeSO4·7H2O投加量为0.5mmol/L,废水pH=4,反应时间为2 h,反应温度为50℃。     

Fenton试剂在处理难降解工业有机废水中的应用

Fenton试剂作为一种高级氧化技术在高浓度、难降解和有毒有害工业有机废水的处理研究中被广泛应用,并取得了显著的成果。综述了Fenton试剂在焦化废水、垃圾渗滤液、印染废水和农药废水处理中的应用研究进展。指出:进一步开展Fenton试剂与混凝沉降、活性炭吸附、生化、光催化等方法组合处理技术的研究,减少药剂投加量降低水处理成本;拓宽pH使用范围和寻求铁离子的固定化技术,应是今后Fenton试剂处理难降解工业有机废水的发展方向。     

Comparative study of different systems for adsorption and catalytic oxidation of hexamine in industrial wastewaters

This work reports adsorption and catalytic oxidation process for degradation of hexamine (HMT)-containing industrial wastewater based on the reduction in total organic carbon. The studied systems include hydrogen peroxide, MCM-41, phosphotungstic acid (PTA)/MCM-41 embedded via impregnation method, PTA/H₂O₂ and PTA/MCM-41 embedded via impregnation or direct synthesis methods in the presence of hydrogen peroxide. The TOC results indicated that the system including PTA embedded within MCM-41 via direct synthetic method in the presence of H₂O₂ has a higher performance for degradation of HMT-containing wastewater. The total organic carbon for the mineralization of HMT was obtained to be 57%, under optimum conditions.