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反渗透净水器会排废水,所以不选它?大错特错!


很多人在购买净水器时常会因废水问题纠结不已,甚至放弃购买净水器。其实大家不必过于烦恼,相比我们每天洗澡、冲马桶用掉的水,净水器排出的废水其实很少。

并且,有废水排出的净水器其净化后的水质才更安全有保障,同时还可以延长滤芯使用寿命,节约净水成本。

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为了更好地净化水质,反渗透净水器在工作时会接出一根废水管,专门用来排废水,废水的主要成分是RO反渗透膜拦截下来的细菌、病毒、有机物、重金属离子等有害杂质。 

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反渗透膜工作原理

废水的产生一方面是由反渗透净水器的工作原理决定的。反渗透膜的工作过程实际上是一个液体浓缩的过程:过滤后的干净水质从RO膜的一侧流出,另一侧含有较高浓度的有机物、金属离子的“浓水”就会被排出形成“废水”。

另一方面,净水器在进行滤芯自动冲洗时也会产生废水。为避免RO膜拦截的杂质堵塞滤芯,净水器会通过自动反冲洗技术对RO膜进行冲洗,以延长滤芯使用寿命。

所以说反渗透净水器产生废水是为了保障水质的洁净安全,同时提高滤芯使用寿命。

 

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有的,市面上的超滤机就是其中之一。超滤净水器的核心部件超滤膜,其孔径相较于RO膜大很多,在过滤杂质的时候也无需再额外增加压力,所以超滤膜无需插电,也不会排放废水。

但其过滤精度远不及反渗透型净水器,在水质情况较差或部分工业城市,还是建议大家选用RO型净水器,饮水更纯净才更安心呐!

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很多人一听到净水器会产生废水,就会觉得很浪费,甚至说净水器是耗水的“水老虎”。这样的说法就真的是误解了。

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在过去,的确有不少净水器废水比,但随着技术发展,尤其是在《反渗透净水机水效限定值及水效等级》新国标实施后,净水产水率低于35%的高耗水产品都已被市场淘汰。现在市面上大部分净水器废水比都控制在合格标准内。

相比我们每天洗澡、拖地、冲马桶用掉的水,净水器排出的“废水”其实很少。

举个例子,一个三口之家每天饮水量为6L,按水效中间档50%算,每天会排出6L废水。而一个人洗一次澡大概就要用掉40L左右的水,一家三口每月洗澡需要2000L到4000L水,这样一比,是不是顿时觉得小巫见大巫了?

 

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当然可以。其实废水并不是一无是处,相反,反渗透净水器的废水经过前段的多级滤芯过滤,已经去除了水中很大部分的杂质。除含盐量和细菌比自来水略高外,其他大多数指标,如浊度、色度、有机物、大颗粒杂质等都要比自来水低。

这样的水除了不能喝以外,可以应用到很多生活场景中,用来浇花、冲厕所、拖地都可以,既节能环保又省钱。

下面小编就教教大家如何收集净水器的废水。

方法一:简单粗暴,直接将水管连到水桶里

简单地把废水管放进一个水桶,可以选择开口较小、容量大、不易打翻的水桶(比如桶装饮用水的那种就很不错)。这种方法虽然简单实用,但可能存在溢水的问题,建议把水桶放在地势较低,有排水口的地方。

方法二:将水管连接到用水量大的地方

动手能力较强的还可以考虑自己DIY一套废水回收系统,或者把水管接到水槽、洗衣机、马桶等用水量大的容器中盛放利用。

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现在我们知道了,反渗透净水器其实并不会浪费很多水,反而因为废水排放才使得水质更安全有保障,还可以延长滤芯使用寿命,节约净水成本。而废水也可以再次利用,节约水资源。疑问都解决了,大家可以放心装上净水器来保障家庭饮水安全啦。


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