Fenton试剂处理邻氯苯胺废水的研究

采用Fenton试剂氧化处理含邻氯苯胺的生产废水,研究了H2O2,Fe2+投加量以及反应体系pH值对废水COD去除率的影响。通过实验,确定了Fenton试剂处理该废水的最佳操作条件:在pH值为3,FeSO4.7H2O的投加量为Fe2+在废水中的质量浓度达到0.56 g/L,每升废水中H2O2(质量分数30%)投加量18 mL时,废水的COD去除率达到72.9%。     

Fenton氧化法处理造纸废水的研究

采用Fenton氧化法处理造纸废水,考察了初始p H值、Fe SO4和H_2O_2投加量及其比值对Fenton反应的影响,以及混合液p H值对絮凝效果的影响。结果表明,Fenton氧化法处理造纸废水的最佳初始p H值为5.0,Fe SO4和H_2O_2投加量之比为2.00∶1,Fe SO4投加量为500 mg/L,H_2O_2投加量为250 mg/L;当混合液p H值接近中性时,絮凝效果较好。CODCr去除率可达85.5%,处理后出水CODCr的质量浓度不超过60 mg/L,色度低于30倍。     

Fenton法及类Fenton法在污水处理方面的研究与应用

Fenton试剂通过H2O2和Fe2+作用产生.OH,因而具有极强的氧化能力,在治理环境污染方面得到了广泛的应用。为了改善Fenton法中H2O2利用率低等缺点,越来越多的研究者将Fenton法与其它方法联/并用,极大提高了Fenton的催化效率。作者主要介绍了Fenton法及类Fenton法催化原理及其在污水及污染物处理方面的应用。     

AAOO-Fenton氧化工艺处理焦化废水

介绍了焦化废水的特点以及AAOO-Fenton氧化工艺处理济钢焦化废水的运行效果。蒸氨废水经AAOO工艺处理后,再经过高效混凝沉淀及Fenton氧化深度处理,出水水质达到了国家二级排放标准。     

Fenton法处理DDNP废水的实验研究

采用Fenton法处理DDNP废水,考察H_2O_2与FeSO_4的体积比、试剂总投加量、pH、反应时间等因素对去除效果的影响.实验结果表明,pH为6,质量分数为30%的H_2O_2投加量为40 mL/L左右、Fe~(2+)投加质量浓度为4.56 g/L,振荡1.5 h,COD_(Cr)去除率可达94.78%,色度去除率可达94.38%.     

混凝-非均相Fenton氧化法深度处理染色漂洗废水研究

采用混凝-非均相Fenton氧化法对某印染厂的染色漂洗废水进行处理,在聚合硫酸铁的混凝作用和黄铁矿作催化剂的非均相Fenton的催化氧化作用下,废水中的污染物得到有效去除。考察了混凝剂投加量、混凝初始pH值、H2O2投加量、氧化初始pH值、黄铁矿投加量及黄铁矿的重复利用等因素对污染物降低效果的影响,研究了黄铁矿催化氧化过程中铁离子形态和浓度变化过程。结果表明,在混凝剂投加量为120 mg/L、混凝初始pH值为7、H2O2投加量为0.12 m L/L、氧化初始pH值为3、黄铁矿投加量为2.5 g/L、氧化反应时间为1 h的条件下,CODCr总去除率达81%,TOC总去除率达67%。黄铁矿重复利用性能良好,具有很好的工程应用性。     

Fenton试剂氧化处理环氧氯丙烷废水的探索

环氧氯丙烷废水毒性强、生物降解性差,不适合用一般的生物方法处理,提出Fenton试剂氧化处理的方法.实验撂索了Fenton试剂反应的影响因素以及条件,发现当废水初始pH为3,H2O2的投加量是1.92 g/L,ρ(Fe2+)=1.60 g/L,即m(H2O2):m(Fe2+)=1.2,Fe2+等量分两次投加,总反应时间为1 h时,COD去除率可达89.44%.药剂分次投加比一次投加对处理效果有很大的提高.     

微波辐射-均相Fenton氧化耦合混凝法处理印染废水

将微波污水处理技术、均相Fenton氧化和传统混凝工艺结合起来对成分复杂的印染废水进行了强化处理。结果表明,微波辐射-均相Fenton氧化耦合混凝法特别适合于处理复杂印染废水,在H2O2和FeSO4.7H2O的质量浓度分别为4.8 g/L和0.08 g/L,微波功率为500 W,辐射处理1 min的最佳条件下,色度和CODCr去除率分别高达98%和95.96%,出水主要水质指标均达到纺织染整工业水污染物排放Ⅰ级标准(GB4287-92)。初步的机理探讨表明,该法充分体现了微波辐射、Fenton氧化与混凝过程之间的协同效应,复杂染料分子降解反应历程的提出使得这种协同效应更为直观。     

铁炭微电解-Fenton氧化法预处理喹吖啶酮颜料中间体废水

采用铁炭微电解-Fenton氧化法对含喹吖啶酮颜料中间体有机废水进行预处理。得到微电解的最佳条件是:pH值为5、铁水体积比为0.375、铁炭体积比为1、反应停留时间为60 min;且这4因素的影响顺序是pH值>铁屑投加量>铁炭体积比>停留时间。Fenton氧化法的最佳条件是:pH值为4～7、反应时间为50 min、FeSO4和H2O2投加量分别为300 mg/L和2.5 mL/L。试验结果表明,将这两种方法联合对含喹吖啶酮颜料中间体有机废水的处理效果十分明显,在最佳试验条件下,当进水COD质量浓度为16 800 mg/L,色度为20 000倍时,COD的总去除率达到94%以上,出水色度小于40倍,为后续处理创造了有利条件。     

Fenton氧化深度处理制药废水二级生化出水

采用Fenton氧化法处理抗生素类药品生产废水二级生化出水,考察了初始pH值、FeSO4·7H2O与H2O2投加量及投加方式、反应时间等因素对CODCr去除效果的影响。试验确定最佳操作条件为:初始pH值为4.0,一次性投加1.2 mL/L H2O2和1.0 g/L FeSO4·7H2O,两者的物质的量比约为3∶1,曝气反应2 h,最终CODCr的去除率可达56.8%;Fenton氧化可将废水m(BOD5)/m(CODCr)值由0.18提高至0.32,为后续生物处理提供了良好条件。     

Control of the Fenton process for textile wastewater treatment using artificial neural networks

BACKGROUND: The Fenton process is a popular advanced oxidation process (AOP) for treating textile wastewater. However, high consumption of chemical reagents and high production of sludge are typical problems when using this process and in addition, textile wastewater has wide‐ranging characteristics. Therefore, dynamically regulating the Fenton process is critical to reducing operation costs and enhancing process performance. The artificial neural network (ANN) model has been adopted extensively to optimize wastewater treatment. This study presents a novel Fenton process control strategy using ANN models and oxygen reduction potential (ORP) monitoring to treat two synthetic textile wastewaters containing two common dyes. RESULTS: Experimental results indicated that the ANN models can predict precisely the colour and chemical oxygen demand (COD) removal efficiencies for synthetic textile wastewaters with correlation coefficients (R²) of 0.91–0.99. The proposed control strategy based on these ANN models effectively controls the Fenton process for various effluent colour targets. For treating the RB49 synthetic wastewater to meet the effluent colour targets of 550 and 1500 ADMI units, the required Fe⁺² doses were 13.0–84.3 and 5.5–34.6 mg L^?1 (Fe⁺²/H₂O₂ = 3.0), resulting in average effluent colour values of 520 and 1494 units. On the other hand, an effluent colour target of 550 ADMI units was achieved for RBB synthetic wastewater. The required Fe⁺² doses were 14.6–128.0 mg L^?1; the average effluent colour values were 520 units. CONCLUSION: The Fenton process for textile wastewater treatment was effectively controlled using a control strategy applying the ANN models and ORP monitoring, giving the benefit of chemical cost savings. Copyright © 2009 Society of Chemical Industry     

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。     

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%。     

Fenton氧化法处理机械加工清洗废水的实验研究

研究了Fenton试剂处理机械加工清洗废水的影响因素及其适宜操作条件。实验结果确定的适宜操作条件为:在原水COD_(Cr)约2 000 mg/L时,n_(H_2O_2)/n_(Fe~(2+))=37.6,H_2O_2的投加量40 mL/L,pH=4,反应时间2.5 h,此时COD_(Cr)的去除率可达91.4%。同时考察了聚丙烯酰胺与Fenton试剂的协同效果。适宜操作条件下COD_(Cr)的去除率可达93.2%。     

Fenton氧化-混凝法处理印染废水的研究

研究了低剂量Fenton氧化-混凝法对3种不同模拟水样和实际印染废水的处理效果。结果表明,Fenton氧化-混凝法特别适合于处理成分复杂(同时含有亲水性和疏水性染料)的染料废水。pH值对Fenton氧化-混凝法的处理效果影响最大,适宜的pH值为4-6。Fe^2 ,H2O2及PAM的加入量与污染物浓度有关,处理前需通过实验确定。实际印染废水的处理结果令人满意,CODCr和色度的去除率分别达到84％和95％。Fenton氧化-混凝法处理印染废水效果好,成本低,操作简便,值得推广。     

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)。     

Stabilization and dewatering of wastewater treatment plant sludge using combined bio/Fenton-like oxidation process

Wastewater sludge usually contains large amounts of water and organic materials; therefore, its stabilization and dewatering are of particular importance. The present study aimed to investigate the possibility of sludge stabilization and dewatering from wastewater sludge by bioleaching (Thiobacillus ferrooxidans), Fenton/bioleaching, and bioleaching/Fenton-like processes. To evaluate sludge stabilization and dewatering, specific resistance to filtration (SRF), volatile suspended solids (VSS), total suspended solids (TSS), and soluble chemical oxygen demand (SCOD) were measured. In biological treatment with T. ferrooxidans with Fe²⁺ (2?g?L^?1), 99.75, 33, 37, and 72% reduction were observed in SRF, VSS, TSS, SCOD, respectively, after 2 days. In the combined treatment of Fenton before bioleaching (including Fe²⁺ 2?g?L^?1 and H₂O₂ 1?g?L^?1 with Fenton oxidation for 30?min followed by biological treatment with T. ferrooxidans for 2 days), the reduction rates in TSS, VSS, SCOD, and SRF were 40.18, 40.88, 60.95, and 75.43%, respectively. In treatment with the combined method of bioleaching before Fenton-like oxidation, the removal rates of the aforementioned parameters were 52.5, 54.4, 88, and 99.82%, respectively. In comparison to Fenton oxidation and bioleaching alone, combined biological method of bioleaching/Fenton-like oxidation using a lower dose of H₂O₂ and Fe²⁺ significantly improved sludge dewatering and stabilization.     

Fenton氧化法处理聚酯多元醇生产废水

采用Fenton氧化与活性炭吸附处理聚酯多元醇的生产废水。实验确定了Fenton氧化工序的工艺操作参数,经处理后可将废水COD由9 900 mg/L降至100 mg/L,出水水质达GB8978—1996《污水综合排放标准》Ⅰ级。结果表明,该处理工艺具有废水处理效果好、出水水质稳定、操作管理方便等优点,是处理该类化工废水的有效方法之一。     

Textile wastewater treatment efficiency by Fenton oxidation with integration of membrane separation system

This work investigates the performance of an integrated Fenton-Ultrafiltration treatment scheme to treat textile wastewater. The treated effluent is particle-free at a quality higher than that obtained by any novel membrane based process or Fenton oxidation in singularity. The study is divided into three parts: part one, Fenton process was optimized for COD: H₂O₂ (wt/wt), H₂O₂: Fe⁺² (wt/wt) and pH to attain highest degradation removal and lowest sludge generation. The process efficiency was analyzed by considering COD, TOC and color removal as key parameters. Part two, the process was scaled up to 5?L and efficiency of integrated system was investigated under optimized conditions by using two different types of membranes at different operating pressures. Part three, the performance of membrane process was studied in terms of flux behavior and its recovery. The treated effluent has COD, TOC and color removal values of 48.0?mg/L, 1.2?mg/L and >99% respectively. These values are compliant to typical discharge environmental standards.     

Fenton试剂—微电解处理焦化废水实验研究

化肥厂焦化废水经生化法处理后,COD、色度均没有达到排放标准。采用Fenton试剂—微电解法对焦化废水进行深度处理,研究了pH、H2O2投加量、FeSO4投加量、反应时间等因素对COD、色度去除效果的影响,并确定了最佳工艺条件。在最佳工艺条件下,COD、色度去除率分别为74.3%、96.9%,出水COD、色度均达到《污水综合排放标准》(GB 8978—1996)的一级排放标准。