What is this BS EN 12255-13 - Wastewater treatment about?  
BS EN 12255-13 specifies the requirements for chemical treatment of wastewater by precipitation/flocculation for removal of phosphorus and suspended solids.
The application of polymers is not described in BS EN 12255-13. Differences in wastewater treatment throughout Europe have led to a variety of practices being developed.
BS EN 12255-13 gives fundamental information about the practices.
BS EN 12255-13 has not attempted to specify all available practices. Detailed information additional to that contained in this standard may be obtained by referring to the bibliography.
Who is BS EN 12255-13 for - Wastewater treatment? 
BS EN 12255-13 on Wastewater treatment is useful for: 
- Urban wastewater collecting systems 
- Urban wastewater treatment plants 
- Plants treating industrial wastewater similar to urban wastewater  
- Water supply treatment plants 
- Sanitation department authorities 
- Public works department officials  
- Government and municipality officials 
Why should you use BS EN 12255-13- Wastewater treatment?  
Treatment of wastewater provides an opportunity for resource recovery, that helps to drought-proof ongoing operations. Reclaiming and reusing industrial wastewater reduces demands on limited freshwater resources, as well as the amount of wastewater and the associated contaminants that are released to the environment.
In BS EN 12255-13, we discuss the many advantages of chemical precipitation processes, the selection of chemicals that can be used, and the proper storage of chemicals.
BS EN 12255-13 covers the general requirements, chemical background and process options, as well as dosing equipment for chemical treatment.
BS EN 12255-13 is intended to provide chemical treatment guidelines that helps to promote understanding between different business parties, governments, to collaboratively develop wastewater treatment and technologies among different countries, improve the efficiency of industrial wastewater reuse, and save and protect the environment. Due to the similar nature, it applies to wastewater treatment concerning discharge. 
BS EN 12255-13 describes requirement and methods for treatment of waste by precipitation and information required to properly operate industrial process waste-streams to quickly determine the requirement of the appropriate treatment or implement technology options for specific industries, reduce operating costs for enterprises, and ultimately promote the systematic development of process water treatment and reuse technologies for industrial application. 
