Case Study 5. Contaminated surface water, China

Case Study 5. Contaminated surface water, China

Location: Yongding River, Bejing, China

>  Scope of the project was to treat surface water from Yongding River for the supply of drinking water.  The water was to comply with World Health Organisation Guidelines for Drinking Water.

>  A Hydroxon system was sent to Beijing to complete testing on a water channel from the Yongding River.  

>  The raw water consisted of high levels of algae and high levels of pathogens including E.Coli. (480MPN/100ml).

>  The raw water also consisted of a range of heavy metals just under the maximum contaminant limit (MCL) for drinking water including chromium, manganese, arsenic and lead.

>  The raw water level of manganese was approaching the maximum limit and it was thought necessary to reduce it further (research shows that high levels of manganese can cause damage to children’s nervous systems).

>  Levels of arsenic were within the maximum contaminant limit (MCL),  however, the accepted levels of MLC vary around the world and many are still considered too high for safe drinking water.

>  The Hydroxon system successfully disinfected and clarified the water to meet the World Health Organisation Guidelines for Drinking Water.

>  The process also efficiently and effectively reduced the levels of all heavy metals present in the raw water including manganese and arsenic.

>  Testing was carried out with the assistance of the China Institute of Water Resources and Hydropower Research in Beijing.