AUTONOMOUS NON-CONTACT SENSOR FOR WATER QUALITY MONITORING

Early warning system for determination of water treatment by monitoring of dissolved organic matters (DOM)  concentration changes

  • WHY DISSOLVED ORGANIC MATTERS MUST BE MONITORED?

Dissolved organic matter (DOM) does not pose health risk itself but may become potentially harmful when in combination with other aspects of water.

DOM reacts with disinfectants such as chlorine to form potentially carcinogenic byproducts called trihalomethanes. Trihalomethanes may have long-term effects on health and they should be considered when chlorinating drinking water high in DOM.

DOM interacts with organic/inorganic contaminants and affects their transport, stability and bioavailability. Moreover, most pesticide models require DOM as one of the main parameter inputs. DOM can also promote the growth of microorganisms by providing a food source.

 

Organic material in water can cause aesthetic problems such as an unpleasant taste, odour and colour.

  • MONITORING THRESHOLD LEVELS

ROW DOM monitors the levels of fluorescent dissolved organic matters (fDOM).

 

DOC concentrations greater than 5 mg/L will complicate water treatment and may result in disinfection by-products and water with less than 2 mg/L of DOC tend to be easily treated for disinfection by-products and do not increase finished water colour.

Onsite installation for DOM monitoring during May 2015 to May 2016 (Location: Estonia)