腐蚀电池法强化后续生化工艺处理印染废水

从腐蚀电池反应的基本原理出发,以腐蚀电池反应中的溶铁量作为外部监控指标,来探求腐蚀电池反应的最佳工艺条件。以循序间歇式活性污泥法(SequencingBatchReactor,SBR)为主体处理方法,在对比SBR法和腐蚀电池法-SBR法处理印染废水降解效果的基础上,重点考察了腐蚀电池对后续生化工艺的影响。研究表明,腐蚀电池法不仅提高了废水的可生化性,而且强化了后续生物处理中的活性污泥,使得腐蚀电池-SBR法在COD、色度去除率上明显高于SBR法。     

沸石在SBR法中的应用

简述了沸石的种类及其性能,介绍了SBR法的基本原理及工艺流程,重点探讨了沸石在SBR法应用中的有关问题。     

活化条件对活性白土脱色率的影响研究

以内蒙古杭锦2#土为原料,用盐酸为活化剂,湿法制备了活性白土,研究了液固比、盐酸浓度、活化时间、活化温度对活性白土脱色性能的影响.结果表明,脱色的最佳条件为液固比2.5∶1,盐酸浓度15%,活化时间4h,活化温度(90±1)℃.     

Characterization and adsorption behavior of a novel triolein-embedded activated carbon composite adsorbent

A novel triolein-embedded activated carbon composite adsorbent was developed. Experiments were carried out in areas such as the preparation method, the characterization of physicochemicai properties, and the adsorption behavior of the composite adsorbent in removing dieldrin from aqueous solution. Results suggested that the novel composite adsorbent was composed of the supporting activated carbon and the surrounding triolein-embedded cellulose acetate membrane. The adsorbent was stable in water, for no triolein leakage was detected after soaking the adsorbent for five weeks. The adsorbent had good adsorption capability to dieldrin, which was indicated by a residual dieldrin concentration of 0.204μg·L^-1. The removal efficiency of the composite adsorbent was higher than the traditional activated carbon adsorbent.     

流化床一步法制破碎活性炭

原煤经粉碎筛选送入流化床反应器．在反应器内一步完成炭化和活化．直接制取活性炭．活化气体是煤气燃烧废气和水蒸气的混合物，本文详细考查了温度．气速和活化气体组成对活性炭产品性能的影响．同时对工业实际生产进行了模拟．为制备性能优良而廉价的活性炭提供了工艺参数．     

传统活性污泥法污水厂增加脱氮功能的研究

我国现有的传统活性污泥法污水处理厂能去除COD和BOD等碳素污染物 ,而往往不具备脱氮能力 ,因此其出水是水体氮素的重要污染源 .介绍的在中试研究基础上的传统活性污泥法投料AO脱氮新工艺 ,能使传统活性污泥工艺在保持较高BOD和COD去除率的同时 ,具有良好的脱氮功能 .研究表明 ,新工艺中试运行稳定 ,出水水质优于国家排放标准 ,对COD和氨氮的平均去除率分别为 88%和 73% .     

活性污泥过程MISO神经网络模型

用误差反向传递 ( BP)神经网络模拟了活性污泥过程 ,发现使用多输入多输出 ( MIMO)神经网络来模拟活性污泥过程变量间关系时 ,线性部分误差较小 ,非线性部分误差较大 ;但若用数个多输入单输出 ( MISO)神经网络的组合来模拟时 ,则对活性污泥过程的线性或非线性关系均能很好模拟     

The autooxidation of 2,3,5,6-tetrahydroxy-2,5-cyclohexadiene-1,4-dione under physiological conditions

Summary A radical anion of 2,3,5,6-tetrahydroxy-2,5-cyclohexadiene-1,4-dione was detected using the EPR technique by complexing with Zn ions. Hydrogen peroxide, superoxide radical anion and hydroxyl radical were also detected in the reaction mixture. Kinetic study and product distribution indicated a probable mixed type one- and two-electron transfer mechanism. A possible relationship between the autooxidation process and the biological activity of substituted quinones was suggested.     

氯化铝对脱水污泥超临界水气化产氢的影响

如何选择或开发合适的催化剂以提高产氢量成为污泥超临界水气化技术,是实现实际应用的关键。选取氯化铝(AlCl_3)作为催化剂,以污水厂脱水污泥为对象,采用间歇式高温高压反应釜,在400℃、24 MPa、30 min的条件下进行超临界水催化气化实验。分析AlCl_3对脱水污泥超临界水气化产氢以及关键产物的影响,探讨AlCl_3的催化机理。结果表明,AlCl_3能够显著促进脱水污泥超临界水气化产氢,在6wt%添加量下氢气产率达到11.52 mol/kg OM,比不添加提高了近43倍。AlCl_3的添加会促进小分子有机物聚合生成酚类物质,抑制小分子聚合生成焦炭。AlCl_3催化机理是水解生成HCl和A_l2(OH)_3。HCl作为酸性水解剂,促进污泥中碳水化合物在亚临界条件下水热解转化成小分子物质,并进一步在超临界条件下气化产生氢气;Al_2(OH)_3作为碱性化合物催化剂,促进水气转化反应促进产氢,二者共同作用促进脱水污泥超临界水气化产氢。     

椰壳活性炭共价固载木瓜蛋白酶的研究

将椰壳活性炭进行可控氧化及硅烷偶联剂（APTMs）反应后,与戊二醛交联,成功地共价固载了木瓜蛋白酶．木瓜蛋白酶固载量为15mg／g,固载酶的最佳活性pH值为7．4,温度为50℃．与游离酶相比,固定化酶的温度、pH稳定性明显提高．溶液酶和固定化酶的Km分别为0．86mol／L和0．95mol／L,Vm分别为0．603和0．528mol·s^-1·g^-1．