Question on slant tube / slant plate clarifier

[GeeFore]

Dear Sirs,

We use both slant-tube and slant-plate clarifier for sludge thickening in the wastewater treatment plant. It is, in our case, a standard procedure to fill the clarifier with clear water before feeding in wastewater, especially after the clarifier had been completely drained. This step is recommended in the clarifier's manual, but it didn't explain why. Could someone tell me is this a must and why?

Thanks a lot!

 

[oxilume]

GeeFore,

GoTo the following website:

http://www.leaucon.com

The owner of the company is an expert on IPC's. In fact he has a superb design. He should beable to answer all of your questions or lead you in the right direction.

Todd

http://www.oxilume.com

 

[sbush]

When you start up a new clarifier, there can be abnormal conditions such as the release of trapped air that can bubble up and agitate the solids to the point that they will carry over. By starting with clean water, you are allowing the system to stabilize and "work out the kinks" while ensuring that the effluent quality will not carry over any solids.

 

[bimr]

The structural design of these components is based on normal operating conditionsm, which is a water filled tank. If you have trap water in the components in an empty tank, the structural members are probably not adequate to support the weight of water.

 

[GeeFore]

Dear bimr,

Sorry I can't understand. As you suggested that the system is designed with water's loading included, then if we feed the wasteater directly into the empty (drained) slant plate clarifier during start-up, the loading on the components will be built up gradually. Won't it be better than, or the same as, first loading the system with clean water and then add the load (both chemically and structurally) of wasterwater feed?

Thanks & Best Regards,
Gee-fore