Pilot Scale Test to Treat High Concentration Gasification Wastewater Using Catalytic Oxidation and Aerobic Biological Fluid-Bed Combination Process

The gasification wastewater is a kind of typical organic industrial wastewater with high chemical oxygen demand （COD） and ammonia nitrogen, which could not be completely degraded by the traditional physical, chemical and biological method. So it is very important to find an effective treatment process. A combination process of catalytic oxidation with noble metal catalysts and aerobic biological fluid-bed packed with the new ultrastructure biological carriers, which was developed by ourselves, was investigated to treat the gasification wastewater. The pilot scale test with 0.5 m^3/h influent flow was carried out to investigate the performance of this new combination process. The results showed that the effluent COD was 84.02 mg/L, ammonia nitrogen was 14.15 mg/L, and total phenol was 0.20 mg/L, which could completely meet the Grade I of Wastewater Discharge Standard （GB8978-1996）, when the influent average COD was 5 564 mg/L, ammonia nitrogen was 237 mg/L, and total phenol was 1 100 mg/L. The two catalytic reactors could evidently improve the wastewater biodegradability, and the value of BOD5/COD （B/C） increased from 0.23 to 0.413 in the one-stage catalytic reactor and from 0. 273 to 0.421 in two-stage catalytic reactor. The further experiment results showed that the effluent quality of this new combination process could still meet the discharge standard, when the COD loading was 8.65 kg / （m^3· d）. Most of aromatic and heterocyclic compounds were degraded effectively in this combination process.     

Oxidative Treatment of Some Reactive Dyes by Fenton Reagent

Nine kinds of reactive dye solutions: Reactive K-2RL, H-E2R, X-6B1Y, HE-4G, X-3B, K-2R,H-E7B, X-4RN and S-F3B were treated by usingFenton reagent. While the concentration of dye is 400mg/L, the FeSO_4 dosage 100-180 mg/L, H_2O_2 240～540 mg/L, that is the stoichiometric numbers of Fe~(2+)and H_2O_2. are between 1: 9～1: 12, pH=3, reaction     

Ordinary Toxicity of Chlorine Dioxide and By-products Chlorite and Chlorate in Water

Acute toxicity and accumulated toxicity of chlorine dioxide (ClO2) and by-products chlorite (ClO2-) and chlorate (ClO3-) in water acted on mice are studied by the method of Horn and accumulation coefficient. Subchronic toxicity of the mixture of ClO2 and ClO2-and ClO3- in water acted on rat is studied though feeding test for 90 days, including statistical analysis of variance on weight gaining, food utilization efficiency,index of blood and serum,liver (or kidney) to body weight ratio, and histopathological examination on liver and kidney. The results show that aqueous solution of ClO2, NaClO2 and NaClO3 ( with the concentration of 276.5 mg/L, 200 mg/L and 200 mg/L respectively) and the mixed aqueous solution of ClO2 with the concentration of 553 mg/L are actually non-poisonous , and non-cumulative aqueous solution as well.     

聚天冬氨酸用于循环冷却水的性能研究

聚天冬氨酸(PASP)是近年来开发的一种新型绿色阻垢剂.为了拓展其应用领域,该文研究了PASP用于某厂循环冷却水时的阻垢性能以及与其他药剂的配伍性.利用模拟配水对其配伍性进行了静态实验研究,然后利用现场实际用水对复合药剂的综合性能进行了动态模拟实验.研究结果表明,聚天冬氨酸与杀菌剂ClO2、缓蚀剂HEDP具有良好的配伍性.当PASP、HEDP和ClO2的质量浓度分别为10、28和2 mg/L时,复合药剂的阻垢率与杀菌率均为100%,缓蚀率高于87%.     

浸没式MBR处理洗浴废水

以规模3 m^3/d浸没式MBR中试设备进行了洗浴废水处理效果的实验研究.原水COD为53.5～341.0 mg/L, NH4-N为7.2～39.1 mg/L,LAS为1.2～5.8 mg/L,浊度为13～152 ntu;经膜生物反应器的处理后出水COD为8.2～23.5 mg/L,去除率为90.9%, NH4-N为0.2～13.5 mg/L,去除率为71.0%,LAS为0～0.2 mg/L,去除率在90%以上, 浊度为1～7 ntu,去除率92%.说明膜生物反应器处理洗浴废水能够取得良好的效果,尤其是进水有机物质量浓度变化较大的情况下,仍然保持好的去除效果.     

UV/H2O2降解酚类物质动力学研究

利用UV／H2O2系统对苯酚进行氧化降解，不同的苯酚初始浓度，浓度自然对数与时间呈良好线性关系，表明苯酚与UV／H2O2系统中羟自由基反应可以按假一级动力学进行处理，其表现反应速率为0．00219s^-1；pH值由3．2升高至10．95时，苯酚的反应速率由0．00241s^-1下降至0．00110s^-1，说明pH对反应的速率有一定的影响．当反应体系温度由20℃上升至40℃时，间甲酚、苯酚和4-氯酚的反应速率常数分别为0．00419s^-1和0．00582s^-1、0．00219s^-1和0．00473s^-1、0．00160s^-1和0．00459s^-1，表明反应速率均有较大提高，反应自由能分别为29．341、12．521和40．158kJ／mol，说明在常规水处理过程中，羟自由基与酚类物质之间的反应在室温下就可以很快完成．     

Removal of Microcystin-LR in Water by Chlorine Dioxide

Microcystins(MCs)are well known as hepatotoxins produced by blooms of toxic cyanobacteria(blue-green algae) abundant in surface water used as drinking water resource and have drawn attention of environmentalists world over by leading to adverse health effects.A study on efficiency and reaction kinetics of microcystin-LR(MC-LR)degradation by ClO2 was performed. Experimental results indicated that MC-LR was removed by ClO2 effectively and the residual concentration of MC-LR could meet the national guideline(GB5749-2006)(1.0 μg·L-1 ),the efficiency of removal was in positive correlation to ClO2 dosage and reaction time and in negative correlation to initial concentration of MC-LR and pH value, whereas it was affected by temperature slightly.ClO2 dosage was the most important reaction factor on base of the orthogonal test results.The reaction was second order overall and first order with respect to both ClO2 and MC-LR,and had an activation energy of 78.81 kJ · mol-1.The reaction rate constant was 4.74×102 L/(mol·min) at 10 ℃.Therefore, oxidation of ClO2 could be taken as an effective technology for removing MC-LR from drinking water resources in traditional drinking water supplies.     

H2O2/Fe3+系统氧化活性染料废水的研究

采用H2O2／Fe^3 系统对商业染料活性红(FN-2BL red)、活性蓝(C—R blue)和活性黄(C-2R yellow)配制的废水进行了脱色研究．结果表明，当染料质量浓度为400mg／L时，pH值为2．5，H2O2质量浓度为646mg／L，F^3 浓度是0．25mmol／L，反应温度在60℃，反应20min，3种活性染料废水的色度去除率均达到99％以上；在以上优化的脱色工艺条件下，通过正交试验以COD去除率为指标确定最佳降解工艺条件．结果表明，初始DH值为2．5，过氧化氢质量浓度对于活性红、活性蓝和活性黄废水分别为850、782、646mg／L，Fe^3 浓度为1mmol／L，反应温度为60℃，反应60min．在最优工艺条件下，活性红、活性蓝和活性黄废水的COD去除率分别达到93．6％、94．5％和96．3％．     

电镀废水处理过程中强碱型阴树脂再生的研究

通过对电镀废水处理中强碱型阴树脂的再生研究,得出了再生条件（NaOH溶液的浓度、用量、流速等）和分等再生与再生效率的关系。认为用1.25～2.5mol/L用量为树脂体积2～4倍的NaOH溶液,流速维持在1～3m/h,则再生效率可以在80%以上。此外,同样再生剂用量,仅仅增加再生剂浓度分级数,可以提高再生效率约10%,提高再生剂利用率。     

UV/H2O2/GAC去除自来水中有机物

利用UV/H2O2系统去除自来水中的有机微污染物质,所需H2O2投量高,水力停留时间长;与GAC单元连用,H2O2投量3mg/L,HRT为8～15min,处理效果与O3/GAC系统相当;研究还表明UV/H2O2系统促进GAC去除自来水中有机微污染物质中起主要的是羟自由基的强氧化作用.