第6部分瓶装饮用水.ppt

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* * 6.瓶装饮用水 1.瓶装饮用水的发展概况及概念 2.矿泉水的评价及其保健作用 3.矿泉水的生产工艺及操作要点 4. 纯净水的生产工艺及操作要点 7.1瓶装饮用水(bottled water)概况 1.概念 瓶装饮用水是指密封在容器中,并出售给消费者直接饮用的水,瓶装是泛指用于装水的包装容器,包括塑料瓶、塑料桶、玻璃瓶、易拉罐、纸包装等。 2.瓶装饮用水种类(按GB10789-1996) --饮用天然矿泉水(natural mineral water ):是指从地下深处自然涌出的或经人工揭露的未受污染的地下矿泉水;含有一定量的矿物盐、微量元素、二氧化碳气体,在通常情况下,其化学成分、流量、水温等动态在天然波动范围内相对稳定。 美(250ppm溶解盐)、英(水文地质学、理化指标、微生物分析、毒性物质是否超标、无污染证明等)、法(临床证明)、德(1000ppm溶解盐)等国对饮用天然矿泉水的定义是不同的。 美国瓶装水水源 Artesian well water. Water from a well that taps an aquifer--layers of porous rock, sand and earth that contain water--which is under pressure from surrounding upper layers of rock or clay. When tapped, the pressure in the aquifer, commonly called artesian pressure, pushes the water above the level of the aquifer, sometimes to the surface. Other means may be used to help bring the water to the surface. According to the EPA(Environmental Protection Agency ) , water from artesian aquifers often is more pure because the confining layers of rock and clay impede the movement of contamination. However, despite the claims of some bottlers, there is no guarantee that artesian waters are any cleaner than ground water from an unconfined aquifer, the EPA says. Mineral water. Water from an underground source that contains at least 250 parts per million(ppm) total dissolved solids. Minerals and trace elements must come from the source of the underground water. They cannot be added later. ·??Spring water. Derived from an underground formation from which water flows naturally to the earths surface. Spring water must be collected only at the spring or through a borehole tapping the underground formation feeding the spring. If some external force is used to collect the water through a borehole, the water must have the same composition and quality as the water that naturally flows to the surface. ·?Well water. Water from a hole bored or drilled into the ground, which taps into an aquifer. 2.瓶装饮用水种类(按GB10789-1996) --纯净水(pure water):是以符合饮用水卫生标准的水为原料,通过电渗析法、反渗透法、离子交换法、蒸馏法

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