橡胶制品工业污水处理工艺设计

橡胶制品工业生产中的污水回用及排放不达标加剧了生态环境状况的日益恶化,本文针对不同水质特性采用生物接触氧化、组合沉淀、消毒、絮凝等工艺对污水处理系统进行改造实施。经一年多的运行证明该改造方案处理效果稳定且耐冲击力较强,可见此工艺设计对橡胶制品企业污水是有效可行的。     

接触氧化-二氧化氯消毒工艺处理医院污水

医院污水排放量不均衡,污水中含有大量的病原性微生物及有毒、有害的物理、化学污染物。采用接触氧化-二氧化氯消毒处理工艺后,污水可以达到广东省地方标准《水污染物排放限值》(DB44/26-2001)中二类污染物第二时段一级排放标准。文章介绍了接触氧化-二氧化氯消毒处理工艺的工艺流程、主要设施与设备、处理效果及处理成本,总结了工程特点。     

基于FLUENT的消毒设备结构优化仿真

基于FLUENT软件对消毒设备抄板结构、抄板个数、消毒室的直径进行了模拟优化.通过研究相同的位置截面上温度场的分布情况得到相对合理结构参数,优化设备结构,提高设备消毒效果.     

The Bank of England, 1950s to 1979

Discovering chemicals as disinfectants and for timber preservation offered profitable opportunities in the early nineteenth century. After 1839 Sir William Burnett promoted his pioneering patent for zinc chloride – attempting to persuade both fellow medical practitioners and the Admiralty of its widespread uses. Trials in the navy, among migrants to Canada in 1847–48, and during Britain's 1849 cholera epidemic were all intended to demonstrate the ability of his product to contain disease, while experiments with impregnated wood sought to secure markets in the shipbuilding and railway industries. Burnett achieved business success at some cost to his professional reputation. His liquid was gradually superseded by carbolic acid and a variety of proprietary brands after his death in 1861.     

Future aircraft turnaround operations considering post-pandemic requirements

Air Transportation is a major contributor to international mobility and has high requirements to ensure safe and secure operations. Aircraft ground operations are impacted significantly by the current pandemic situation so that standard operating procedures need a redesign to incorporate the upcoming sanitation requirements. In particular, the passenger boarding process is challenged with requirements for physical distances between passengers, while in addition to standard cleaning, the cabin has to be disinfected after each flight. We evaluate potential alterations of these two aircraft cabin processes with respect to a pre-pandemic reference aircraft turnaround. The implementation of microscopic approaches allows to consider individual interactions and a step-wise process adaptation aiming for an efficient operational design. We find a significant extension of boarding times (more than doubled) if the physical distance rule is applied. The new disinfection process further extends the critical path of the turnaround, so we see a high impact on airport and airline operations. To compensate for the increased workload and process times, we provide an integrated cleaning and disinfection procedure with additional personnel. Our results indicate that the pre-pandemic turnaround times cannot be maintained for the same seat load, even if the process adaptations are being implemented. However, a seat allocation scheme with empty middle-seats (seat load of 67%) and the use of an apron position (additional use of rear aircraft door for boarding) enable pre-pandemic turnaround times without additional cleaning personnel. Aircraft turnarounds at terminal positions require between 10% (with additional personnel) and 20% (without additional personnel) more ground time.     

餐具消毒行业分析及对策研究

随着这几年餐具消毒行业的迅速发展,该行业内"乱象频出"。本文通过分析核算正规餐具消毒企业及黑作坊的生产成本以及政府部门的执法程序等因素,指出政府部门应该通过加大监管力度、成立行业协会等措施对行业进行规范。     

树脂吸附法去除水中氯化消毒副产物的实验研究

通过自制的新型超高交联吸附树脂ZF01和ZF02与常用的吸附树脂Amberlite XAD-4对去除水溶液中的氯仿、三氯乙烯和2,4-二氯苯酚进行比较。结果表明,ZF01和ZF02的吸附能力均大于XAD-4,可用于去除水中不同浓度的氯仿和三氯乙烯。其中,ZF02树脂对各有机物的吸附量最大,分别为0.379、0.394和2.744mmol/g,并具有较好的脱附再生性能。在自来水小柱吸附试验中,ZF01和ZF02两种超高交联吸附剂对水中三氯甲烷和三氯乙烯去除率达到96%-98%;当流量60ml/min时,两种污染物残余浓度仅约0.50μg/L,表明ZF01和ZF02能有效地吸附自来水中微量氯化消毒副产物,可应用于饮用水深度净化处理工艺。     

关于再生水消毒技术的探讨

随着再生水回用的快速发展,使得人们对再生水安全日趋重视,而消毒技术是保障再生水安全的一道重要屏障。本文从技术特点、途径和经济性等方面对城市再生水厂目前的消毒技术进行了分析比较,同时对目前研究较多的新技术作了简要概述,提出了再生水组合消毒技术的新思路。     

新型臭氧发生器的设计及实验

利用一种新型气体放电结构,设计了一款用于有毒气体消毒的臭氧发生器装置。讨论了产生臭氧的基本机理,对该装置的结构进行了详细的论述,并对它的放电特性进行了研究。最后对该装置进行了实验研究,得出了一些有益的结论。     

游泳池水臭氧消毒系统设计问题初探

针对游泳池给水排水设计规范中有关规定,结合工程实践经验,提出了臭氧消毒与氯消毒应关注的主要问题,针对主要设计参数提出了取值范围和设备选取要点。