共查询到18条相似文献,搜索用时 31 毫秒
1.
中水回用作为钢铁企业循环水水资源,已经越来越受到各大钢铁企业的重视。超滤加反渗透的双膜法脱盐工艺已经逐步应用于钢铁企业工业污水的深度处理。从本企业实际运行效果来看在不同程度上存在着反渗透系统污堵快、清洗频繁以及由于频繁清洗造成的反渗透脱盐率下降等现象。对目前本企业全厂工业污水采用反渗透处理工艺所发生的常见问题做初步的分析。 相似文献
2.
本文主要是对电镀废水来源、分类、性质、危害和特征及其处理现状进行分析,进而对电镀废水的处理技术方法进行介绍,论述了各项技术的处理范围、优点以及处理中所存在的问题。 相似文献
3.
根据目前湿法烟气脱硫工程废水处理系统的设计情况,简述了湿法烟气脱硫废水的特性及处理原理,并提出了废水处理的合理化建议。 相似文献
4.
采用厌氧技术处理造纸废水,在无氧的条件下,通过厌氧菌的作用,使废水中的大分子有机物发生降解,产生沼气和小部分的微小物质(污泥)。造纸废水在经过絮凝、初沉、均衡、调制后,在上流式厌氧反应器发生转化反应,可获得85%的能量以甲烷的形式存在,再以热或电的形式回收。 相似文献
5.
6.
在当前时代背景下,为保证电力企业的发展,将现代化反渗透技术应用在电厂废水综合处理中已经成为了必然趋势。反渗透技术不仅可以有效提高电厂废水的综合处理效率,还能有效降低环境风险问题的发生概率,为电力企业的可持续发展提供有效推动力。 相似文献
7.
8.
9.
11.
12.
13.
武威 《中国对外贸易(英文版)》2011,(14)
流水作业法在水利工程建设中可以使资源得到充分利用,使人力使用、物力资源、资金等不必要的损耗减少,从而达到节约能源,降低成本的效果.在保证工程按期优质的交付使用情况下,提高了生产效率和经济效益.本文从水利工程角度出发,阐述了流水作业在水利施工中的应用. 相似文献
14.
15.
The impact of the introduction and use of an informational website on offline customer buying behavior 总被引:1,自引:0,他引:1
J.E.M. van Nierop P.S.H. Leeflang M.L. TeerlingK.R.E. Huizingh 《International Journal of Research in Marketing》2011,28(2):155-165
Do customers increase or decrease their spending in response to the introduction of an informational website? To answer this question, this study considers the effects of the introduction and use of an informational website by a large national retailer on offline customer buying behavior. More specifically, we study a website's effects on the number of shopping trips and the amount spent per category per shopping trip. The model is calibrated through the estimation of a Poisson model (shopping trips) and a type-II tobit model (the amount spent per category per shopping trip), with effect parameters that vary across customers. For the focal retailer, an informational website creates more bad than good news; most website visitors engage in fewer shopping trips and spend less in all product categories. The authors also compare the characteristics of shoppers who exhibit negative website effects with those few shoppers who show positive effects and thus derive key implications for research and practice. 相似文献
16.
Despite the growth of the Internet, one area that has not really been discussed is the elderly's use of the Internet. Given the rapid growth of this population as well as the potential the Internet holds for them, it is a subject worth consideration. However, seniors cannot be defined simply by their chronological age, but by their cognitive age. This paper discusses the impact of cognitive age of a national random sample of American elderly consumers on their Internet use. The results suggest that those seniors with a younger cognitive age use the Internet more than those seniors with an older cognitive age. Additionally, seniors with a younger cognitive age have more social contact off‐line (but not online) than those seniors with an older cognitive age. Finally, in terms of demographic variables, chronological age is positively associated with cognitive age and women report a younger cognitive age than men. These results suggest that for policy makers interested in increasing the participation of seniors, they can utilize the Internet to reach those who are younger in terms of cognitive age; however, they will not be able to reach all seniors in this manner and they need to utilize the Internet as a complementing media to their traditional communication sources. 相似文献