Municipal Services

Lewatit® ion exchange resins and Lewabrane® membranes for municipal services

 

Drinking water supply, wastewater treatment and waste disposal are among the most critical municipal services. Very strict demands are imposed on the purity of drinking water as our most important nutriant. Only responsible treatment practices make it possible to maintain a continuous cycle for turning wastewater back into water suitable for man and animals, agriculture and industry. Wastes and other potential pollutants must be stored and dumped in such a way that they do not get into the water cycle. However, proper dumping is not always ensured, making complex treatment operations necessary.

Both ion exchange resins and membrane technologies make key contributions to mastering these challenges.

For instance, membrane processes are used successfully to demineralize ocean and brackish water. In both large and stationary and compact and mobile plants, they generate not only drinking water but also industrial cooling and process water. The Lewabrane® range of membrane elements from LANXESS fulfills all expectations on separation capacity, long service life and sets new standards in energy efficiency.

In drinking water and wastewater treatment, ion exchange resins benefit from their unique ability to selectively bind ions. With special Lewatit® grades, unwanted constituents such as iron or manganese can be removed from drinking water, as can traces of pollutants like arsenic, lead and pesticides. Even groundwater can be treated efficiently in this way by binding pollutants, such as chromate, mercury, surfactants and chlorinated hydrocarbons, to the ion exchange resins. Ionic and non-ionic contaminants, which could otherwise disrupt operations in biological water treatment plants or endanger the environment, can be removed from wastewater just as efficiently.