Algae screening

[BRIS]

I am designing a large diameter raw water transfer pipeline (2.6 m diameter, flow 8.7 m3/sec (140,000 gpm)). The pipeline is supplied from an open surface impoundment reservoir. I am proposing to use twin 1.2 m diameter submerged discharge sleeve valves at the outlet from the reservoir to the pipeline.

I have just learned that under some conditions the reservoir suffers severe algae growth. I am concerned that the algae will cause blockage of the small ports in the sleeve valves also we need to remove algae before the raw water enters the pipelines.

I am therefore proposing to install screens upstream of the sleeve valves. The pressure upstream of the valves is 50.m head (5 bar, 73 psi). The screens will need to be self cleaning.

The alternative is to replace the ported sleeve valves with hollow jet type valves and provide low pressure screens downstream of the valves.

I am looking for advice/manufacturers of suitable self cleansing screens.

brian

 

[yogibear1]

You may search for products at

http://www.waterinfocenter.com,

then click on Buyer's Guide, there are all kinds of vendors and products available. You may try a search under Screens, Bar; Screens Fine; Screens, Rotary; Screens, Water/Wastewater (about 30 vendors); or Screens, Traveling (vendors such as Brackett Green USA, Inc, US Filter, Westech Engineering, Inc.). Then there are many Filter categories to look through too.

Another outside possibility would be to control the algae growth.

 

[oxilume]

Brian,

An ideal algae filter is a tilted coanda effect screen. It is commonly referred to as a tilted wedge wire screen.

Contact Mark Hoyack with Krebs Engineers of Tucson, Arizona. They are the best when it comes to hydrocyclones and screens.

Todd

http://www.oxilume.com

todd@oxilume.com