Adsorption Characteristics of Remazol Black B on Anoxic Sludge

The adsorption characteristics of Remazol Black B on anoxic sludge were investigated. The parameters, such as initial pH, sulphate concentration, and temperature,affecting the dye adsorption were studied. The adsorption data were analyzed with three adsorption isotherm models,namely Langmuir, Freudlich, and linear partition. The results showed that adsorption of Remazol Black B on the sterilized sludge reached equilibrium in 4 h. It also indicated that pH had significant effect on anoxic sludge adsorption behavior. The adsorption capacity of anoxic sludge decreased with the increase of pH value and the maximum adsorption capacity of dyes occurred at pH = 3. The adsorptive capacities increased with the decrease of temperature and increase of sulphate concentration. Results also indicated that the adsorption equilibrium of Remazol Black B on anoxic sludge could be well fitted by Freundlich model.     

Improved Performance of Membrane Bioreactor by Sludge Ozonation for Reduction of Excess Sludge Production

To seek for an alternative solution for the treatment and disposal of excess activated sludge, a hybrid system of membrane bioreactor ( MBR) coupled with ozonation process (i.e., ozonation run) was set up to treat the domestic wastewater. A reference run without ozonation was also preformed as a control. The optimal ozone dose of solubilization in the ozonation run was firstly determined through the batch sludge ozonation tests. A 40-day continuous operation of the two parallel systems demonstrated that circulation of ozonized sludge as lysate did not impact the performance of MBR in terms of organic and ammonia removal. On the contrary, an improvement in TN removal (by 7.7%) and sludge reduction (by 54%) was observed in the ozonation-combined MBR, and it was furthermore illustrated by the calculation of the mass balance based on the COD and TN substances. In addition,ozonation did not deteriorate the sludge activities for the ozonation run, indicating that not much inert organic materials built up in the bioreactor. Decreased VSS/SS ratio and lower amount of filamentous bacteria after ozonation treatment on the other hand improved the sludge settleability, as lower and constant Sluge Volume Index (SVI) values were detected in the ozonation run.     

炼油厂剩余污泥中温厌氧消化处理试验研究

针对中国石油锦州石化公司污水处理厂的剩余污泥采取动态半连续流中温厌氧消化试验,进行污泥减量化及资源化的中试研究。对系统进行每天定量投配生污泥,考察不同停留时间污泥系统中pH值、VFA、碱度、固相及液相COD的参数变化情况以及COD、VSS的降解情况。结果表明：锦州石化公司剩余活性污泥有较好的消化性能,消化周期为20～25d,COD去除率为70.3%,VSS去除率为55.6%,1kgCOD产气量为0.33m3。污泥混合物实现了剩余污泥的减量化与资源化。     

Research and development of 780 MPa cold rolling TRIP-aided steel

As an industry-university cooperative project, an experimental research was conducted to develop a new cold-rolled transformation-induced plasticity (TRIP) steel with a tensile strength of 780 MPa and an elongation of 25% under the conditions that some processing parameters were preestablished according to the actual conditions of factory production lines. The optimal heat treatment conditions for obtaining excellent strength-ductility balance, specifically in intercritical annealing temperature and isothermal treatment temperature, were investigated by means of thermal simulation tests. Ultimately the desirable mechanical properties were attained successfully, and the microstructure and retained austenite stability were studied by optical microscopy (OM) and electron back-scattered diffraction (EBSD). It has been discovered that the sizes of retained austenite grains are generally proportional to the sizes of carbon-clear space (ferrite and bainite) around them, and there is marked selectivity in their transition sequences under stress-strain.     

从蛇毒中提取神经生长因子的废水处理工艺研究

以提取蛇毒中神经生长因子过程中产生的废水为处理对象,经混凝-Fenton试剂催化氧化深度预处理后,改善了可生化性,CODCr降到2230 mg/L,BOD5/CODCr为0.26.随后结合加压SBR法进行生物处理,最佳组合工艺条件为:混凝处理的pH值为8,PAC浓度为150 mg/L;Fenton试剂催化氧化条件为:H2O2的用量为20 ml/L,pH值为4,反应时间为60 min;加压SBR法处理的停留时间为8 h,处理后出水CODCr小于100 mg/L,达到国家规定的一级排放标准.     

水解酸化——复合生物反应器处理玻璃厂废水工程设计

介绍了玻璃厂废水处理工程的概况,阐述了废水处理工艺流程、主要处理构筑物及设计参数,进行了技术经济分析,总结了调试与运行情况,指出本工程设计采用水解酸化工艺提高废水的可生化性,提高了后续生物处理的去除效果,水解后的生物处理采用先进的复合生物反应器工艺,出水水质稳定达标,处理效率较高。     

真空联合堆载预压+强夯置换法组合处理沿海冲填土地基

以大窑湾15号、16号集装箱泊位软基处理工程为例,详细介绍了将真空联合堆载预压法和强夯置换法相结合处理软弱黏性土的施工工艺及优势,指出此法值得在类似工程中推广。     

太原市垃圾污染及其处理控制措施探讨

随着太原市经济的快速发展,城市垃圾增长速度加快,垃圾污染问题也日益加重.通过对太原市未来几年垃圾增量预测及垃圾处理现状调查与垃圾组分的分析,探讨了太原市城市垃圾处理的有效控制措施.     

如何做好湿陷性黄土地区渡槽基础处理

结合宁夏固海扩灌八干渠小塬沟渡槽工程,就如何在湿陷性黄土地区做好渡槽基础处理做了简单探讨,以期对类似工程基础处理有借鉴作用.     

土壤重金属的污染与治理进展研究

土壤重金属是土壤环境污染最主要的一个方面.介绍了重金属污染的特点和危害机理,并针对污染途径提出了"减源""截流"和"修复"治理措施,控制流入环境中的重金属的绝对值;重点介绍了土壤重金属污染修复的各种方法.