cooling water treatment chemicals market 2019: global at thailand
process is commonly used in wastewater treatment, but it is often the case that the effluent from wastewater treatment plants has remaining phosphorus and nitrogen in the form of ammonium and/or nitrate. A post-treatment process is therefore required to remove nitrogen and phosphorus from the effluent.
The removal of phosphate from the effluent of a sewage works comes under the Urban Waste Water Treatment Directive (UWWTD) (91/271/EEC) and it requires the control of nitrogen and phosphorus input into water bodies by specifying minimum treatment requirements to be achieved, related to the population equivalent (PE), this being the size of the
