Fenton试剂处理香精香料废水的研究

采用Fenton试剂处理香精香料废水,试验探讨了不同pH、H2O2(30%)、FeSO4·7H2O用量和反应时间等因素对CODCr去除率的影响。结果表明,在pH为3、H2O2投加量为40mL/L、FeSO4·7H2O投加量为4g/L、反应时间为3h时,CODCr去除率为75%,色度去除率最高达到82%。Fenton试剂对香精香料生产废水的CODCr和色度都有较好处理效果。     

Fenton试剂与TiO_2光催化氧化农药废水研究

以合肥市循环经济园区某农药厂的生产废水为研究对象,分别将Fenton高级氧化法和TiO2光催化氧化法应用于农药废水的预处理,研究了反应时间、pH值、H2O2投加量、TiO2投加量等对CODCr去除率的影响。结果表明:Fenton高级氧化法和TiO2光催化氧化法在处理农药废水方面都具有一定的效果;H2O2投加量是影响Fenton试剂氧化农药废水的主要因素,当初始pH值为4、反应时间为90 min、Fe2+的投加量为0.04 mol/L、H2O2投加量为0.4 mol/L时,Fenton高级氧化法的处理效果最好;在光催化氧化试验中,当初始pH值为9、反应时间为120 min、TiO2投加量为2.64 g/L时,TiO2光催化氧化效果最佳。     

Fenton试剂处理马铃薯淀粉废水的实验研究

为研究Fenton试剂对马铃薯淀粉废水的处理效果,为实际生产提供依据,实验采用静态烧杯实验,通过单因素实验方法考察了Fenton试剂反应的主要影响因素及最佳反应条件。实验表明:在FeSO4投加量为0.3 g/L,H2O2为1.2 g/L,反应时间为30 min,pH值为2的最佳反应条件下,马铃薯淀粉废水的COD去除率最高达68.43%,浊度去除率达98.53%。该方法的处理效果较为明显,可作为马铃薯淀粉废水有效的预处理方法。     

Fenton氧化预处理磷酸酯阻燃剂生产废水

针对磷酸酯阻燃剂生产废水中COD质量浓度高,含有微生物难降解的成分,是一种难处理的有机废水的现实,利用Fenton氧化工艺对磷酸酯阻燃剂生产废水进行预处理,测定水中COD质量浓度的变化情况,以评价Fenton氧化工艺的处理效果,并考察Fe SO4·7H2O投加量、H2O2投加量及不同酸调节p H值对处理效果的影响。结果表明,最佳工艺条件为:Fe SO4·7H2O加入量为5 g/L,H2O2加入量为5.55 g/L;用硫酸调整p H值优于用盐酸调整p H值。     

UV-Fenton法降解垃圾渗滤液中COD的动力学研究

采用UV-Fenton法处理垃圾渗滤液,研究其COD去除的动力学特性及初始pH、FeSO4·7H2O用量和H2O2用量等因素对动力学常数的影响。结果表明:Fenton反应符合准一级反应动力学模型,综合考虑运行成本、反应速率和COD去除效果等情况,控制初始pH为8、FeSO4·7H2O投加量为0.1g/L和H2O2用量为1.0mL/L,UV-Fenton法处理垃圾渗滤液的除碳性能最佳,COD去除率达到80%以上。     

O3／H2O2预处理难降解制药废水研究

研究O3/H2O2联合作用对去除难降解制药废水COD、改善废水可生化性的效果,并考察pH值、臭氧用量、H2O2投加量等因子对预处理效果的影响。实验结果表明,pH值为11左右,臭氧用量为1 20g/L、H2O2投加量为20mmol时,废水COD去除率达到62%,BOD5/COD提高到0 36。如果用SBR进行二级处理,可使最终出水指标达到国家排放标准。     

EDTA-粉煤灰/H2O2体系处理模拟制革废水的试验研究

通过实验以及动力学分析表明用配体的引入对体系进行改进,提高了基于粉煤灰的多相类Fenton体系对模拟制革废水的去除效果,同时得到EDTA-粉煤灰/H2O2体系降解模拟制革废水的最佳反应条件:在室温下,反应pH值为10,初始COD值为110.8 mg/L,过氧化氢浓度为200.4 mg/L,EDTA的浓度为250 mmol/L,粉煤灰投加量为10 g/L的情况下,COD和色度的去除率都在95%以上,粉煤灰在多次使用后,COD去除率均达到97%以上。     

Fenton氧化混凝沉淀法处理焦化废水研究

采用Fenton试剂氧化联合混凝沉淀法处理焦化废水生化处理二沉池出水,考察了COD去除效果及经济性,提出了适宜的反应条件。浓度为30％的H2O2投加量为400mg／L,Fe^2＋／H2O2（摩尔比）为1：5,反应时间为0．5h,pH值为3,PAC投加量为100mg／L。试验结果表明焦化废水COD去除率为70．6％,出水COD浓度达到GB8978—1996（国家污水综合排放标准》一级,处理成本相对较低,具有工程实际应用可行性。     

Fenton氧化法深度处理制革废水生化出水试验研究

采用Fenton氧化法深度处理以制革废水为主的园区生化处理出水,试验表明:影响Fenton氧化的因素从大到小依次为H2O2投加量、Fe2+浓度、pH、反应时间。当进水CODCr平均为116.6mg/L时,在H2O2投加量50mmol/L、Fe2+投加量10mmol/L、pH为3、反应时间60min的最佳条件下,出水CODCr平均为31.7mg/L;在H2O2投加量25mmol/L、Fe2+投加量7.5mmol/L、pH为5、反应时间40min的经济运行条件下,出水CODCr平均为46.6mg/L。经济条件下的运行成本比最佳条件下的运行成本可节约2.3元/m3。     

芬顿法深度处理造纸废水

利用芬顿(Fenton)法对造纸废水生化出水进行深度处理,考察了废水pH值、反应时间、FeSO4投加量和H2O2投加量对废水中色度和CODC r去除率的影响。结果表明:在pH值为5.00、FeSO4投量为400 mg/L、30%H2O2投量为200 mg/L,反应时间为30 m in,出水CODC r可降至60 mg/L以下,色度的去除率可达到74%,可以满足更为严格的造纸废水排放标准,为进一步的工程设计提供依据。     

Fenton试剂处理选矿废水的试验研究

研究用Fenton试剂处理含苯胺黑药(二苯胺基二硫代磷酸)模拟废水和实际选矿废水,分别考查了反应初始pH值、Fe2+浓度及H2O2用量对COD去除率的影响。结果表明:氧化时间为10 min,反应初始pH值为4,ρ(Fe2+)=1.83 g/L,ρ(H2O2)=5.55 g/L,模拟废水苯胺黑药的质量浓度为300 mg/L时,COD去除率达到83.6%;对于实际废水,当ρ(Fe2+)=50mg/L,pH值=3.5,ρ(H2O2)=1800mg/L时,出水ρ(COD)从1000mg/L降到32 mg/L,COD去除率为96.8%,达到废水排放标准,药剂成本估计为每处理1 m3废水需要费用18元。     

Optimization of Fenton process for decoloration and COD removal in tobacco wastewater and toxicological evaluation of the effluent

Decoloration and chemical oxygen demand (COD) removal in tobacco wastewater by Fenton process has been optimized under 25 +/- 2 degrees C. The results showed that the optimal range of conditions were pH 4.13-4.66, Fe(2+) 0.29-0.34 g/L and H2O2 > or = 2.73 g/L. Within this range, up to 95% of colour and 90% of COD was removed. In an enlarged system, setting the optimal conditions as pH 4.50, Fe(2+) 0.34 g/L and H2O2 4.00 g/L, the colour removal rate was 96.03 +/- 2.57%, with COD removal rate of 93.30 +/- 2.92%. The residual COD of 73.67 +/- 19.70 mg/L in effluent had hit the State's first-class standard for the industrial discharge in China (< 100 mg/L COD, GB8978-1996). The ecological safety of Fenton process has also been evaluated. When reaction completed, the content of hydroxyl free radical (OH) was 3.26 +/- 0.44 mg/L. There was no inhibition of Fenton effluent in growth of Escherichia coli, Pseudomonas putida, Pseudomonas sp. HF-1, Acinetobacter sp. TW and Sphingomonas sp. TY. No oxidative stress was induced on strain HF-1 by Fenton effluent. Thus, Fenton process was one of high-efficiency and ecologically safe strategy for tobacco wastewater advanced treatment.     

Electro-oxidation of two reactive azo dyes on boron-doped diamond electrode

Electrochemical oxidation (decolorization/degradation) of blue and red commercial reactive azo dyes was carried out on boron-doped diamond (BDD) electrode. The effect of various quantities of FeSO(4) was investigated in the electro-Fenton reaction on BDD. Progress of dyes degradation during the electrolysis and electro-Fenton reaction was monitored by UV-visible absorption and by estimation of the chemical oxygen demand (COD). Direct electrolysis showed a limiting capacity for red and blue dye removal even at high current densities, e.g. maximum red color and COD removal were 70 and 20%, respectively at 30 mA cm(-2) after 300 min. Higher red and blue color removal efficiencies were achieved by electro-Fenton oxidation. Current density of 30 mA cm(-2) in the presence of 0.05 mmol/L of FeSO(4) resulted in the red color and COD removal of 98 and 96%, respectively. The optimum FeSO(4) concentration for the electro-Fenton reaction was determined to be 0.05 mmol/L. Instantaneous current efficiency (ICE) in the presence of FeSO(4) was almost three times higher than for experiments carried out without FeSO(4).     

Enhanced degradation of paracetamol by UV-C supported photo-Fenton process over Fenton oxidation

For the treatment of paracetamol in water, the UV-C Fenton oxidation process and classic Fenton oxidation have been found to be the most effective. Paracetamol reduction and chemical oxygen demand (COD) removal are measured as the objective functions to be maximized. The experimental conditions of the degradation of paracetamol are optimized by the Fenton process. Influent pH 3, initial H(2)O(2) dosage 60 mg/L, [H(2)O(2)]/[Fe(2+)] ratio 60 : 1 are the optimum conditions observed for 20 mg/L initial paracetamol concentration. At the optimum conditions, for 20 mg/L of initial paracetamol concentration, 82% paracetamol reduction and 68% COD removal by Fenton oxidation, and 91% paracetamol reduction and 82% COD removal by UV-C Fenton process are observed in a 120 min reaction time. By HPLC analysis, 100% removal of paracetamol is observed at the above optimum conditions for the Fenton process in 240 min and for the UV-C photo-Fenton process in 120 min. The methods are effective and they may be used in the paracetamol industry.     

酸析—微电解—Fenton氧化预处理亚麻脱胶废水的研究

高浓度亚麻脱胶废水CODCr、色度都很高,不宜直接进行生物处理.试验采用酸析-微电解-Fenton氧化的预处理工艺,并对反应的影响因素进行了研究,试验结果表明,在pH=3,微电解90 min,H2O2投量1 500 mg/L,Fenton氧化120 min的条件下,CODCr去除率可以达到71.4%,色度去除率超过90%.同时该方法提高了废水的可生化性,有利于后续的生化处理.     

Fenton-活性炭法处理炮弹销毁废水的实验研究

针对炮弹销毁废水TNT、CODCr及色度含量高、水质稳定、难以降解的特点,在实验室试验的基础上,采用Fenton氧化-活性炭吸附的集成技术,进行了现场的实验研究,重点分析研究了影响Fenton氧化效果的主要因素,确定了最佳的运行参数,即c(H2O2)=0.05 mol/L,c(Fe2+)=1.80 mmol/L,pH=3.5,反应时间t=12 h。实际生产运行表明,经Fenton氧化后,TNT可有效去除80%,CODC r去除率为84%,经活性炭吸附后TNT<1 mg/L,CODC r<50 mg/L,出水水质稳定,完全达到冷却水回用标准,实现了污水的零排放。     

Pilot-plant results of the electro-Fenton treatment of olive mill wastewaters followed by anaerobic digestion.

In this work, we investigated an integrated technology for the treatment of the recalcitrant contaminants of olive mill wastewaters (OMW), allowing water recovery and reuse for agricultural purposes. The method involves an electrochemical pre-treatment step of the wastewater using the electro-Fenton reaction followed by an anaerobic bio-treatment. The electro-Fenton pre-treatment process removed 66% of the total polyphenolic compounds and subsequently decreased the OMW toxicity from 100 to 66.9%, which resulted in improving the performance of the anaerobic digestion. A continuous laboratory-scale methanogenic reactor was operated at a loading rate of 10g COD/L per day without any apparent toxicity. Furthermore, in the combined process, a high overall reduction in COD, suspended solids, polyphenols and lipids content was achieved by the two successive stages. Moreover, this combined process which was experimented at a real scale (25 m3 digester) demonstrated its technical feasibility and opens promising perspectives for industrial application in the Mediterranean countries because of its easy conception and high energy (methane) production.     

高浓度含酚含醛废水预处理工艺研究

研究了缩合/精馏—活性炭吸附—Fenton氧化工艺预处理高浓度含酚含醛废水的效果,对影响除污效果的因素进行了试验探讨,并确定了工艺优化条件。高浓度含酚醛废水经本工艺处理后,CODCr、苯酚、甲醛去除率分别为98.9%、99.7%、99%,出水CODCr约1350mg/L,苯酚低于70mg/L、BOD5/CODCr约为0.33,能满足最终生化处理要求。