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水处理包括:污水处理和饮用水处理两种,有些地方还把污水处理再分为两种,即污水处理和中水回用两种。经常用到的水处理药剂有:聚合氯化铝、聚合氯化铝铁、碱式氯化铝,聚丙烯酰胺,活性炭及各种滤料等。

水处理的效果可以通过水质标准衡量。

为达到成品水(生活用水、生产用水或可排放废水)的水质要求而对原料水(原水)的加工过程。

加工原水为生活或工业的用水时,称为给水处理;

加工废水时,则称废水处理。废水处理的目的是为废水的排放(排入水体或土地)或再次使用(见废水处置、废水再用)。

循环用水系统以及水的再生处理中,原水是废水,成品水是用水,加工过程兼具给水处理和废水处理的性质。水处理还包括对处理过程中所产生的废水和污泥的处理及最终处置(见污泥处理和处置),有时还有废气的处理和排放问题。水的处理方法可以概括为三种方式:①最常用的是通过去除原水中部分或全部杂质来获得所需要的水质;②通过在原水中添加新的成分,通过物理或化学反应后来获得所需要的水质;③对原水的加工不涉及去除杂质或添加新成分的问题。

水中杂质和处理方法 水中杂质包括挟带的粗大物质、悬浮物、胶体和溶解物。粗大的物质如河中漂浮的水草、垃圾、大型水生物、废水中的砂砾以及大块污物等。给水工程中,粗大杂质由取水构筑物的设施去除,不列入水处理的范围。

废水处理中,去除粗大的杂质一般属于水的预处理部分。悬浮物和胶体包括泥沙、藻类、细菌、病毒以及水中原有的和在水处理过程中所产生的不溶解物质等。溶解物有无机盐类、有机化合物和气体。去除水中杂质的处理方法很多,主要方法的适用范围可以大致按杂质的粒度来划分(图1)。由于原水所含的杂质和成品水可允许的杂质在种类和浓度上差别很大,水处理过程差别也很大。

就生活用水(或城镇公共给水)而论,取自高质量水源(井水或防护良好的给水专用水库)的原水,只需消毒即为成品水;取自一般河流或湖泊的原水,先要去除泥沙等致浊杂质,然后消毒;污染较严重的原水,还需去除有机物等污染物;含有铁、锰的原水(例如某些井水),需要去除铁、锰。生活用水可以满足一般工业用水的水质要求,但工业用水有时需要进一步的加工,如进行软化、除盐等。

当废水的排放或再用的水质要求较低时,只需用筛除和沉淀等方法去除粗大杂质和悬浮物(常称一级处理);当要求去除有机物时,一般在一级处理后采用生物处理法(常称二级处理)和消毒;对经过生物处理后的废水,所进行的处理过程统称三级处理或深度处理,如当废水排入的水体需要防止富营养化所进行的去除氮、磷过程即属于三级处理(见水的物理化学处理法)。当废水作为水源时,成品水水质要求以及相应的加工流程随其用途而定。理论上,现代的水处理技术,可以从任何劣质水制取任何高质量的成品水。


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Q & A: MORE >>
  • 1.Central air conditioning yellow water how to do?
    A:
    Central air-conditioning chilled water and condensate water are recycled water, the cycle will be adsorbed in the air of dust, foreign bodies, etc., water will generate microorganisms, so require regular replacement of water, if dirty very interested, or even to add special cleaning agent Cleaning; if condensation in the condenser more scale, will result in cooling effect of central air conditioning decreased, electricity consumption increased, so also regularly open the cleaning condenser. The way to do this is to change the frequency of cooling water and condensate and to clean the condenser……
  • 2.Circulating cooling water algae growth in a lot of how to deal with?
    A:
    Circulating water due to nutrient concentration, temperature and summer prolonged sunshine, bacteria and algae to create a rapid breeding conditions. Much like the mucilage secreted by bacteria, it allows dust and chemical buoys floating in the water to bond together to form slimy sediments. A biofouling sludge attaches to the heat transfer surfaces of the host condenser Heat transfer filler), in addition to causing corrosion under the scale, but also to reduce the flow of circulating water, reducing heat exchange efficiency, increase power consumption and host load, in severe cases will plug the pipeline……
  • 3.Cooler fouling can clean it?
    A:
    Can be cleaned. Cooler fouling is generally divided into two types of tube fouling and tube fouling, as circulating water generally use soft water, so fouling tube generally does not appear, unless your circulating water is not soft water, remove the detergent first Use soft water cycle. Most of the cooler scaling is outside the tube scaling, there are two reasons for its study, first, the circulating water pipe is too high, because the spray water is generally used groundwater that is hard water, so if the tube temperature is too high will make the spray water temperature Rise, the formation of scale in the pipe wall, the second is spray water itself with high Mg and other elements, especially in mountainous areas, the water is relatively hard……
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phone:400-854-0068
fax:0571-87243867
mailbox:hzyuexin8@163.com
Q Q:2637788248
Company Address: No.37 Gaoke Road, Guangzhou Tianhe Smart City
Address: Room 2302, Block C, Xizi International, Jianggan District, Hangzhou City, Zhejiang Province

About us
Guangzhou Yuexin Engineering Technology Co., Ltd. was established in 1992 01 month 04 days, is located in Guangzhou Tianhe wisdom of the city hi tech Road No. 37. The country has 23 branches and offices, is a set of circulating water treatment engineering (industrial, civil) air conditioning installation, electrical and mechanical equipment maintenance in one of the private Limited Guangdong. Company now has 218 employees, including 16 engineers, technical personnel 145 people, the country has more than 1500 fixed customers, involved in industries including electricity, automobile, food and beverage packaging, injection molding, hotel, large square, building, transportation and so on.        All along, Hangzhou is a brand of water treatment Guangdong Guangdong business development foundation, a Integrated Company to refrigeration equipment, refrigeration accessories retail and technical services for business development. For many years and some well-known enter...
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