“婚庆经济”拉动了与其相关的40多个产业，然而，记者走访江城婚车租赁公司发现，今年“五一”婚庆高峰并没有给他们带来一如往年的火爆。婚车租赁观念也有了很大的变化，新人往年都想用宝马、奔驰、林肯等大牌车“拉风”，今年都宁愿多要几辆全新的普通车。宁要新奥迪不要旧林肯
“五一”结婚的王先生，在一汽车租赁公司定下了三辆全新黑色奥迪A6作为结婚当天的头阵车。王先生说，本来想过要租更高档的林肯，但觉得车型太旧，还不如三辆新车来得好看。
万胜、盛客隆等汽车租赁公司的相关负责人告诉记者，今年消费者的观念与去年大不相同，往年都想用宝马、奔驰、林肯等大牌车“拉风”，今年都宁愿多要几辆全新的普通车。
万胜的负责人桂先生说，公司有一辆林肯，车况很好，就是型号有些旧，去年每个月都要“出镜”好几次，但今年来已经很少露面。相反，奥迪A6、君威旗舰版等全新的普通车更受欢迎。私车挂靠租价降低
据了解，今年租婚车的价格较去年低。以一辆奥迪A6为例，3个小时的价格去年为800元，今年则降到了600元。桂先生透露，越来越多的私车挂靠，给婚车租赁带来了便利，但也使租价降低。
合肥梦园汽车租赁公司提供合肥汽车租赁服务,合肥租车,合肥婚庆租车,合肥商务车租赁，以别克林肯、奥迪A6、别克君威，奥德赛车为主.根据客户不同需求提供合肥汽车租赁服务,也为各大企业单位、社会团体提供公务用车、会务用车、代客接机、婚礼配车及旅游包车长期或短期的租赁业务
2008年2月5日星期二
Water purification
Water purification is the process of removing contaminants from a raw water source. The goal is to produce water for a specific purpose with a treatment profile designed to limit the inclusion of specific materials; most water is purified for human consumption (drinking water). Water purification may also be designed for a variety of other purposes, including to meet the requirements of medical, pharmacology, chemical and industrial applications. Methods include, but are not limited to: ultraviolet light, filtration, water softening, reverse osmosis, ultrafiltration, molecular stripping, deionization, and carbon treatment.
Water purification may remove: particulate sand; suspended particles of organic material; parasites, Giardia; Cryptosporidium; bacteria; algae; virus; fungi; etc. Minerals calcium, silica, magnesium, etc. and toxic metals (lead, copper, chromium etc). Some purification may be elective in the purification process, including smell (hydrogen sulfide remediation), taste (mineral extraction), and appearance (iron incapsulation).
Governments usually dictate the standards for drinking water quality. These standards will require minimum / maximum set points of contaminants and the inclusion of control elements that produce drinking water. Quality standards in many countries require specific amounts of disinfectant (such as chlorine or ozone) in the water after it leaves the water treatment plant (WTP), to reduce the risk of re-contamination while the water is in the distribution system.
Ground water (usually supplied as well water) is typically a more economical choice than surface water (from rivers, lakes and streams) as a source for drinking, as it is inherently pre-filtered by the aquifer from which it is extracted. Over large areas of the world, aquifers are recharged as part of the hydrologic cycle. In more arid regions, water from an aquifer will have a limited output and can take thousands of years to recharge. Surface water is locally more abundant where subsurface formations do not function as aquifers; however, ground water is far more abundant than the more-visible surface water. Surface water is a typical raw water source used to make drinking water where it is abundant and where ground water is unavailable or of poor quality. However, it is much more exposed to human activity and its byproducts. As a water source it is carefully monitored for the presence of a variety of contaminants by the WTP operators.
It is not possible to tell whether water is safe to drink just by looking at it. Simple procedures such as boiling or the use of a household activated carbon filter are not sufficient for treating all the possible contaminants that may be present in water from an unknown source. Even natural spring water - considered safe for all practical purposes in the 1800s - must now be tested before determining what kind of treatment, if any, is needed. Chemical analysis, while expensive, is the only way to obtain the information necessary for deciding on method of purification.
Water purification may remove: particulate sand; suspended particles of organic material; parasites, Giardia; Cryptosporidium; bacteria; algae; virus; fungi; etc. Minerals calcium, silica, magnesium, etc. and toxic metals (lead, copper, chromium etc). Some purification may be elective in the purification process, including smell (hydrogen sulfide remediation), taste (mineral extraction), and appearance (iron incapsulation).
Governments usually dictate the standards for drinking water quality. These standards will require minimum / maximum set points of contaminants and the inclusion of control elements that produce drinking water. Quality standards in many countries require specific amounts of disinfectant (such as chlorine or ozone) in the water after it leaves the water treatment plant (WTP), to reduce the risk of re-contamination while the water is in the distribution system.
Ground water (usually supplied as well water) is typically a more economical choice than surface water (from rivers, lakes and streams) as a source for drinking, as it is inherently pre-filtered by the aquifer from which it is extracted. Over large areas of the world, aquifers are recharged as part of the hydrologic cycle. In more arid regions, water from an aquifer will have a limited output and can take thousands of years to recharge. Surface water is locally more abundant where subsurface formations do not function as aquifers; however, ground water is far more abundant than the more-visible surface water. Surface water is a typical raw water source used to make drinking water where it is abundant and where ground water is unavailable or of poor quality. However, it is much more exposed to human activity and its byproducts. As a water source it is carefully monitored for the presence of a variety of contaminants by the WTP operators.
It is not possible to tell whether water is safe to drink just by looking at it. Simple procedures such as boiling or the use of a household activated carbon filter are not sufficient for treating all the possible contaminants that may be present in water from an unknown source. Even natural spring water - considered safe for all practical purposes in the 1800s - must now be tested before determining what kind of treatment, if any, is needed. Chemical analysis, while expensive, is the only way to obtain the information necessary for deciding on method of purification.
订阅：
博文 (Atom)