Main Stream Diffuser ozone injection system

What is the MSD SYSTEM?

Main Stream Diffuser (MSD) is the world’s first ozone injection system. Two major parts in the system are an ozone injector that can evenly distribute and inject ozone microbubbles into the main pipeline and a pipeline reactor that can maximize ozone reaction. This new technology has enhanced efficiency and economy of water treatment by homogenization of wastewater using division, conversion, reversal and turbulence.

Process chart

Water treatment efficiency of the technology

1. Excellent synedra removal capability

   • More than 99% of synedra removed when ozone was injected at 1.5 ppm
   

   
   • In case the intrusion of the algal materials which are difficult to be removed by the standard water treatment process, 99% were removed by the operation of pre-ozonation only and the rest of them were completely removed by the post-ozonation and activated carbon filtration
   

2. Provide high efficiency for the treatment of disinfection byproduct

   • The removal efficiency of disinfection-byproducts varies greatly depending on the operation of the ozone injection systems
     - A DWTP: Operated since 2013
     - B DWTP: Operated since 2014
     - Both DWTP use same water source

   A DWTP	THMs	2011	2012	2013
   	Sand filtered	0.036	0.040	0.025
   	AC filtered	0.043	0.040	0.025
   	Finished	0.050	0.044	0.027

   B DWTP	THMs	2011	2012	2013
   	Sand filtered	0.037	0.038	0.033
   	AC filtered	0.045	0.040	0.039
   	Finished	0.051	0.047	0.041

   Comparisons of disinfection byproduct removal

3. Excellecnt oxidation reaction efficiency

   • More than 99% ozone oxidation reaction efficiency at ozone concentration of 1.5 ppm
   

   

4. Improved removal efficiency of the taste and odor causing materials

   • More than 70% of 2-MIB and 60% of geosmin were removed at the ozone injection rate of 1.5ppm

   Component	Raw water	Treated water	Ozone injection rate	Removal efficiency
   2-MIB	0.018	0.008	1ppm	55.6%
   2-MIB	0.017	0.005	1.5ppm	70.6%
   2-MIB	0.018	0.005	1.5ppm	72.2%

   Component	Raw water	Treated water	Ozone injection rate	Removal efficiency
   Geosmin	0.017	0.011	0.7ppm	35.3%
   Geosmin	0.048	0.023	1.5ppm	52.1%
   Geosmin	0.038	0.015	1.5ppm	60.5%
   Geosmin	0.273	0.065	1.5ppm	76.2%
   Geosmin	0.139	0.039	1.8ppm	71.9%

   A DWTP Taste & odor causing material removal efficiency

Safety of the technology

Zero ozone concentration in the discharge

• Advanced blockade of ozone into the atmosphere maintaining zero ozone concentration in the discharge
• Improvement of the working environment and maintain the indoor atmospheric air quality standard

Dissolved ozone analyzer(1.5ppm ozone injection)

Ambient ozone monitor(1.5ppm ozone injection)

Economy of the technology

Capital and O&M cost savings

• Compared to the conventional technology, the foot print of the site can be reduced to 50〜70% to achieve capital cost savings
• O&M cost can be reduced in the ozone generation system by the high ozone reaction efficiency
• The system can be operated using the gravity of the flow or by the pressure of ozone generator only without additional pressure

Ease of maintenance in the technology

Reduce maintenance and idle time

• Access for maintenance can be achieved by shutting down the system only. Evacuation of process water is not needed
• The effect of the shutdown to the overall system is minimum due to short idle time.(Replacement can be achieved within 2 hours)

Connectivity of the technology

Achieve the improved treatment capability by integrating with membrane filtration system(Gongsan WTP)

• Improved coagulation effect by the stabilization of colloidal materials by ozone
• Minimize the chances of membrane contamination by removing ferrous and manganese removal
• Provide ultimate removal efficiency at the end of the treatment

Technology

• 

  New Excellent Technology certification(No.493)

  • Main Stream Diffuser ozone injection system

• 

  New Excellent Technology verification(No.194)

  • Main Stream Diffuser ozone injection system

Actual installation