Reactor Clarifier - Out of Service

[Pulpboy]

We have a reactor clarifier and we need to take it out of service for some major maintenance (couple weeks). The problem is we need to keep running. So we have a dilemna.

Do it in summer and have lots of dirt but softer water or do it in winter and have clean water but hard.

I don't like either option so I'm wondering if anyone knows how to minimize each problem with special equipment and who to go to. eg. Portable centifuges / / conditioning equipment.

We run at flow rate of about 1000 l/s but I'm sure we can reduce down to less.

 

[cub3bead]

What is the clarified water used for?

 

[countryham]

Yes, there may be a way to do it cheaply, as I did thirty years ago... Tell me more about your water supply... High turbidity?.. Kind of chemical treatment?... Storage capacity? Residence time?

 

[Pulpboy]

We've decided to do it in September when turbidity is near it's lowest (no run off due to melting - everything's starting to freeze again) and hardness isn't a problem yet because the flow hasn't really changed.

To answer some of your questions.

Capacity - 20,000,000 liters,
Residence time would therefore be ~ 6 hours
We use alum / polymer to help clarify he water in summer and use lime in the winter. We have 6 large gravity filters and a recarb tank (C02)

 

[bimr]

You have not said whether or not this is a municipal application. That would have a bearing on your solution.

Depending on how much money you have available, you can rent tanks from baker. You can also investigate a tie-in with an adjacent water plant (if available).

 

[Pulpboy]

It is an industrial application - no treatment facilities nearby. I think a September shutdown will minimize problems.

But just in case please feel free to keep commenting on differnet solutions - the baker company is pretty interesting - I've never heard of them before.