Characteristics of integrated biological aerated filter in municipal wastewater treatment

In this paper, the characteristics of integrated biological aerated filter （IBAF） applied to municipal wastewater treatment were studied in a pilot scale experiment. The experimental results showed that IBAF has high efficiencies in removing organic pollutants, such as CODCr and SS, in municipal wastewater. The removal rates of CODCr and SS can reach over 90% and 80%, respectively, when COD and SS in the influent are 234 mg L^-1 and 112 mg L^-1, hydraulic retention time （HRT） is 8 h, and the aerated intensity is in the range of （0.5 to 0.6） L m^-2 s^-1.     

水处理絮凝剂的研究进展

为了促进水处理絮凝剂的迅速发展和实际应用,综述了水处理絮凝剂在国内外的研究进展,并简要介绍了各类絮凝剂在各种水处理情况下的应用及其今后的发展方向,对今后的研究工作提出了一些建议和设想。     

Enhanced degradation of carbon tetrachloride by surfactant-modified zero-valent iron

Sorption of carbon tetrachloride （CT） by zero-valent iron （ZVI） is the rate-limiting step in the degradation of CT, so the sorption capacity of ZVl is of great importance. This experiment was aimed at enhancing the sorption of CT by ZVI and the degradation rate of CT by modification of surfactants. This study showed that ZVI modified by cationic surfactants has favorable synergistic effect on the degradation of CT. The CT degradation rate of ZVI modified by cetyl pyridinium bromide （CPB） was higher than that of the unmodified ZVI by 130%, and the CT degradation rate of ZVI modified by cetyl trimethyl ammonium bromide （CTAB） was higher than that of the unmodified ZVI by 81%. This study also showed that the best degradation effect is obtained at the near critical micelle concentrations （CMC） and that high loaded cationic surfactant does not have good synergistic effect on the degradation due to its hydrophilicity and the block in surface reduction sites. Furthermore degradation of CT by ZVI modified by nonionic surfactant has not positive effect on the degradation as the ionic surfactant and the ZVI modified by anionic surfactant has hardly any obvious effects on the degradation.     

污水处理电气控制系统的研制

采用三级计算机系统对污水处理过程进行智能控制、监测和管理。其中以中位机可编程序控制器(PLC)为系统核心,负责控制所有电动机、电磁阀等开关量,并通过A/D转换器及传感器组成的测控系统,接受下位机控制仪表的所有数据,再将处理过的数据经数据通信上传至上位PC机。上位PC机采用VB编制的组态软件,实时显示污水处理的工艺流程及各种模拟量的变化值。下位机采用智能仪表,对变频调速器、开度阀等进行过程控制。     

含酚废水治理技术进展

介绍了含酚工业废水的治理现状．对萃取、吸附、电解、化学絮凝、液膜、生化法等治理技术进行比较，阐述了各种方法的特点及发展趋势．     

实验室废水处理研究进展

该文介绍了实验室存在的危害，总结了其思想和管理等源头处理方式以及实验药品的回收、预处理和综合处理等处理方法，对实验室废水处理的技术进行了展望，实现了实验室药品回收取得经济性，又避免实验室废水排入河流中造成环境污染。     

石墨烯复合物在含Hg废水处理中的应用研究

采用化学还原的方法制备石墨烯氧化物,并将其负载在聚吡咯上,通过XRD、SEM、TEM、Raman、TGA等手段表征其结构。将其应用于系列金属离子水溶液的吸附试验,发现其对Hg2+具有很好的吸附选择性和吸附量,并且该石墨烯氧化物材料在经过酸处理后还能循环利用,这为含Hg2+废水的处理提供了一种潜在的方法。     

试析卫河污水治理

卫河是海河流域的一条重要河道，70年代以来，卫河水日趋严重，污水治理迫在眉睫，兴建污水处理厂是改善卫河水污染状况的根本途径。     

IC多功能污水厌氧实验装置的研制

研制了一种用于生活污水或有机工业废水厌氧处理研究的多功能实验装置，该装置可作为IC反应器和UASB反应器分别用于研究在一定的处理效果下的工艺参数的确定、运行参数的确定、颗粒污泥特性研究、三相分离器性能研究、环形布水器性能研究、沼气产率分析等，为学生掌握厌氧污水处理技术提供了坚实的实验基础。     

Treatment of chitin-producing wastewater by micro-electrolysis-contact oxidization

The technique of micro-electrolysis-contact oxidization was exploited to treat chitin-producing wastewater. Results showed that Fe-C micro-electrolysis can remove about 30% CODcr, raise pH from 0.7 to 5.5. The CODcr removal efficiency by biochemical process can be more than 80%. During a half year's operation, the whole system worked very stably and had good results, as proved by the fact that every quality indicator of effluent met the expected discharge standards; which means that chitin wastewater can be treated by the technique of micro-electrolysis, contact oxidization.     

学生宿舍污水处理工程的对比性研究

本文对比研究了物理-化学方法和生物处理法处理学生宿舍污水,从处理效果、工程运算及运转费用、运行稳定性来看,建议采用物理化学法处理.     

Treatment of chitin-producing wastewater by micro-electrolysis-contact oxidization

INTRODUCTION1,4connected2-acetylamino-2-deoxide--D-glucose,commonlyknownaschitin(chemicalformulaC8H13NO5)withmolarweightof203.19,existsaswhiteorpaleyellowplatesintheindustrialpureproduct.Apolyosewithnaturalamountnexttothatofcelluloseontheearth,itcanbefoundininsects,crustsofcrustacean,andthecellwalloffungi.Ithassteadychemicalpropertyandnotox-icity;andcanbebiodegradedbylysozyme,indi-catinggoodbio-affinity.However,itcanonlybedissolvedinhydrochloricacid,sulfuricacid,aceticacid,and78%-97%phos…     

微生物燃料电池耦合人工湿地处理废水过程中的产电研究(英文)

构建了一种连续流无膜人工湿地-微生物燃料电池,其水力停留时间为 2 d. 系统以葡萄糖为基质启动2 ～ 3 d 后,在外接电阻为 1 kΩ时,其稳定输出电流密度高于 2 A /m3,同时,COD 去除率大于 90% . 比较了阴阳极间距为 10,20,30 和 40 cm 的系统. 当间距为 20 cm 时,系统的产电电压、库仑效率和能量密度皆最高,分别为 560 mV,0. 313% 和 0. 149 W /m3,且 COD 去除率也为最高,达到 94. 9%. 此外,各系统中的 DO最低浓度均出现在装置中部. 结果表明,COD 去除率越高,系统产能越高,因而库仑效率也越高. 人工湿地-微生物燃料电池系统作为一种低成本及环境友好的污水处理同步产电技术显示出实际应用潜力.     

Technological feasibility of biodiesel production from bioaugmented hydrolysate of waste sludge in a municipal wastewater treatment plant

The hydrolysate of waste sludge was used as the feedstock of biodiesel production, and its technological feasibility was investigated. Waste sludge, collected from No.3 Municipal Wastewater Treatment Plant of Xi＇an, was hydrolyzed in two parallel reactors firstly. Yeast was added into one reactor for bioaugmentation, and the other reactor without yeast was used as a control. Then an acid-catalyzed in situ esterification process was carried out to convert the hydrolysate to biodiesel. The results of hydrolysis showed that the reactor bioaugmented with yeast could promote hydrolysis compared with the control one because of an obvious variance in total suspended solid （TSS）, volatile suspended solid （VSS） and soluble chemical oxygen demand （SCOD）. Furthermore, gas chromatography （GC） analysis exhibited that the total volatile fatty acid （VFA） was low in the hydrolysate of bioaugmentation reactor; however, its yield of the fatty acid methyl esters （FAMEs） by in situ esterification was obviously higher when compared with the control one. Therefore, it may be inferred that the hydrolysate of bioaugmentation was mainly inclined to longer-chain fatty acid rather than to VFA. Anyway, an FAMEs yield of 9.24% （wt%） from dried sludge was attained after the 12-d bioaugmentation hydrolysis and succedent esterification. This value was not only higher than that of the control one but also higher than that reported in previous literature. The above results illuminated that it was feasible to produce biodiesel from the bioaugmented hydrolysate of waste sludge.     

废纸造纸废水处理技术的可行性探讨

针对我国废纸造纸行业的快速发展,归纳了废纸造纸废水的来源、污染特性,阐述了近年来国内废纸造纸废水处理技术的可行性.以某废纸造纸厂采用"混凝沉淀+生物接触氧化法"处理废水为实例,对废纸造纸废水处理技术可行性进行实践论证,供废纸造纸企业选择废水处理技术时参考.     

Applications of artificial intelligence technology to wastewater treatment fields in China

1 Introduction a Water pollution is quite severe in China. According to the statistical data of The Environmental Protection Ministry of China in 2003, the whole wastewater discharge came to 4.46 × 1014t all over the country. 46.2% in that were industrial wastewater and 53.8% were sewage. In 407 environmental monitoring sections of the seven main rivers of China in 2003, only 38.1% of the tested sections accorded with the the national water quality standard of Grade III, and 29.7% of the …     

Substituted plan analysis in the environmental impact assessment of Yongchuan wastewater treatment project

Substituted plan in EIA mainly means a the treatment technology and the substituted site of wastewater plant, and it also includes the many kinds of environment protection measures. In principal, the substituted plan should reach the same aim and achieve …     

Assessment of semi-empirical mass transfer correlations for pervaporation treatment of wastewater contaminated with chlorinated hydrocarbons

INTRODUCTION Chlorinated hydrocarbons, a class of widely used dry-cleaning liquids, industrial organic solvents, and degreasers, increasingly find their way into drinking water sources, thus posing a very serious health and environmental problem (Love and Eliers, 1982). These organic solvents are known for their stability in the environment and cancer-causing po- tency and cannot be effectively and economically eliminated by current conventional treatment tech- nologies. One of the few av…     

函数增强型神经网络应用于钢的冷弯性能研究

函数增强型神经网络（FunctionalEnhancedNet,简称FEN）是一种无隐含层的新型网络,作者应用其三阶联合激励增强特性对钢的冷弯性能进行判别研究,识别准确率近100％．对预测集的每一个输入信号添加噪音干扰,发现依然能准确判别．网络误差下降随着添加噪音的增大而逐渐变慢,可见该网络的容错能力令人满意．     

膨润土复合无机高分子絮凝剂的制备及其在淀粉废水处理中的应用

以天然无机高分子材料膨润土为原料,应用化学改性方法,制备了膨润土复合无机高分子絮凝剂和自配膨润土复合无机高分子絮凝剂,并将其应用于淀汾废水处理,取得了较好效果,处理后的淀粉废水清澈透明,由实验可以得出结论淀粉废水中悬浮物COD的去除,受溶液的pH值影响较明,pH值越低效果越好.