双针穿刺器式一次性输液器的改进设计与临床应用

结合临床上常见的输液管中有气泡出现的问题,讨论了现有双针穿刺器式一次性输液器的结构缺陷,提出了相应的改进设计方案。     

铁路站车垃圾衍生燃料制备工艺的正交试验研究

利用北京门头沟煤和铁路站车垃圾,在室温下采用钢模制备出了垃圾衍生燃料.选用L9(34)正交表,以落下强度和热稳定性为评价指标,考察了含水率、成型压力、煤配比和垃圾破碎粒度4个主要因素和3个水平条件对铁路垃圾衍生燃料制备工艺的影响.研究表明:各因素对垃圾衍生燃料(RDF)的热稳定性均无显著影响.试验得到的最优生产工艺参数为:成型压力50 MPa,含水率20%,粒径大小<13 mm,煤配比90%.     

沈阳市固态垃圾排放的生态足迹与强度

基于生态足迹成分法的基本原理,构建了度量城市固态垃圾环境压力的生态足迹与排放强度计算模型.应用该模型对沈阳市1990-2005年垃圾排放的生态足迹进行了计算.结果表明,垃圾排放的生态足迹几乎全部来源于吸收垃圾降解产生的温室气体所需要的森林面积,1990年约2O×10hm2,2005年约15x104hm2.另外,对沈阳市...     

医疗废物处置技术研究——以襄汾县人民医院河西新院为例

介绍了襄汾县人民医院河西新院建设的背景,分析了医院运营期产生的固体废物种类和危害性,制定出具体的处置、管理措施,对危险固体废物进行了妥善处理处置,对环境影响很小。     

太原市城镇污水处理厂污泥处理处置方式的选择

阐述了现阶段污泥处理处置的重要性和必要性,介绍了我国污泥处置方面的政策和标准,基于太原市城镇污水处理厂污泥处置的现状,提出了正确选择污泥处理方式的建议。     

视频监测报警系统的设计与实现

视频监测技术在远程监控和无人值守监控中发挥着重要的作用。本文介绍了基于Java语言设计的视频监测报警系统,利用Java语言独立于平台的特性和完整的网络支持,实现了监测地点图像采集、处理、存储,针对异常情况可发出报警信息,用户可以通过网络浏览器远程查看实时的视频情况。测试结果表明,系统运行安全可靠,满足实时监测的需求。     

包埋法固定化微生物技术中的载体选择及在污水生物处理中的应用

较详细介绍了包埋法固定化微生物技术中不同种类包埋载体的特点,比较分析了不同载体的使用对污水生物处理效果的影响,指出了包埋法的应用范围.     

One-step disposal of Cr (Ⅵ)-bearing wastewater by natural pyrrhotite

Cr(VI)-bearing wastewater can be treated by natural pyrrhotite which is used for reductant to reduce Cr(VI) and precipitant to precipitate Cr(III) simultaneously. The disposal products can be divided into three parts in the beakers, namely supernatant in the upper part, the yellowish colloidal precipitates in the middle part and the pyrrhotite in the lower part. The content of total Cr=Cr(VI)+Cr(III) in the supernatant liquid is 0.06 mg/L, which is lower than 1.5 mg/L of the discharge standard of China and near to 0.05 mg/L of the standard of potable water. This one-step disposal composing of both reduction and precipitation which is traditionally divided into two independent steps called reducing technology and precipitating technology respectively. The new method is of obvious economic advantage and favourable to decreasing surplus mud derived from adding Ca(OH)₂ to precipitate Cr(III) traditionally so as to avoid recontamination. In fact, sodium sulfite (Na₂SO₃) used in disposal of Cr(VI) was traditionally produced from natural mineral of pyrrhotite (FeS). One molecule of FeS is 4 times more than that of Na₂SO₃ from a view point of rational use of mineral resources. Therefore the prospective of application of the one-step disposal of Cr(VI) method is full of promise.     

One-step disposal of Cr (Ⅵ)-bearing wastewater by natural pyrrhotite

Cr(Ⅵ)-bearing wastewater can be treated by natural pyrrhotite which is used for reductant to reduce Cr(Ⅵ) and precipitant to precipitate Cr(Ⅲ) simultaneously. The disposal products can be divided into three parts in the beakers,namely supernatant in the upper part,the yellowish colloidal precipitates in the middle part and the pyrrhotite in the lower part. The content of total Cr=Cr(Ⅵ)+Cr(Ⅲ) in the supernatant liquid is 0.06 mg/L,which is lower than 1.5 mg/L of the discharge standard of China and near to 0.05 mg/L of the standard of potable water. This one-step disposal composing of both reduction and precipitation which is traditionally divided into two independent steps called reducing technology and precipitating technology respectively. The new method is of obvious economic advantage and favourable to decreasing surplus mud derived from adding Ca(OH)2 to precipitate Cr(Ⅲ) traditionally so as to avoid recontamination. In fact,sodium sulfite (Na2SO3) used in disposal of Cr(Ⅵ) was traditionally produced from natural mineral of pyrrhotite (FeS). One molecule of FeS is 4 times more than that of Na2SO3 from a view point of rational use of mineral resources. Therefore the prospective of application of the one-step disposal of Cr(Ⅵ) method is full of promise.     

万州区城市污水治理课题初探

对万州区水污染的现状、特点提出了几种治理方法,为万州区政府解决水污染提供一些参考。