it all depends on how much manure your system generates.

a lot of folks stock pile their manure and capture liquids and spread them later.

many dairymen spread manure every day to keep up.

the bad thing about stockpiling manure is that you lose the fertiliser value. Ideally feeding a methane digester is the way to go to reduce volume.

with out knowing your system I can not help much. ■

Dear Ove,

now that I know where you are with your project-

folks over here have dealt with it several ways,

May dairys use an "AOSmith slurrystore" to store their waste in a high liquid form to spread it at a later date.

Still others store there manure with bedding and spread it on cropland after harvest and plow it under or in the spring before

planting.

the ones who store their manure usually have a concrete dry pit

where they push all the manure and the liquid drains away from the pile to a storage lagoon.- this is something you could do by adding quick lime to the manure stream to help solidfy the mass of manure, the only thing I would worry abut is spreading it on crop land too soon due to lime content.

Not being a full time farmer I will give you this advice telephone or e-mail the "Cornell University Cooperative Extension Service" and request some of the Midwest Regional planning service manuals and books that they publish for animal housing and manure control and storage. they are worth the money- I bought books regarding sheep housing and they really told me a lot.

www.cornell.edu

These folks are top notch in their field.

lzaharis@lightlink.com

the other option which will solve your problem completely is to use a large septic tank or battery of septic tanks connected in series paralell as clarifier thickener and pump manure

into them and then let the liquid flow out of the other end of the baffled tank and pump out the tanks as needed- the only thing is that you will need a vacuum truck or a tractor powered lagoon mixing pump that will fill the truck or a liquid manure spreader

from the septic tanks- the nice thing about that is that it helps to reduce the odor as the bugs are already working on the manure.

you can always help it along by throwing in a couple of broken up yeast cakes as well.

I hope I have not overloaded you with information :^) ■

Dear Sir

I'm more familiar with mining and chemical industries, and when they wish to separate solids from liquids, they use a centrifuge. These machines come in several configurations and work well to start your separation process. From there you can go to a dryer, or stockpile.

Hope this helps.

Regards,

Al Goodmundson ■

Dear Ove,

the only way you will be able to get full liquid separation is with a clarifier or a toothed weir seration chamber or chambers in series as is done in sewage treatment plants.

At the large california dairies they let all the manure go in to a pit

-concrete lined and then they scrape out the solids with a tractor mounted back blade, leavng the liquid to evaporate, smelly mess but it works. how many cows are you milking? have you ever thought of using a digester to eliminate your effluent? ■

Perhaps the simplest solution to your separation problem is the use of a vibrating screen such as a Kason or similar. This comprises one or more circular screens with a central feed and peripheral discharge(s).

You may be able to hire one for trials either from a local supplier or from another source such as a mineral processing equipment hire company. Some experimentation with aperture size would be required.

On the site below, figure 1 shows one of these screens being used in an application that seems similar to yours.

http://www.aces.edu/pubs/docs/A/ANR-1025/

Good luck with it. ■

Dear Mr. Owe,

The simplest way to seperate the solids of about 5-10% from remaing water, is to use a Cavitation Air Floatation clarifire and a BELT PRESS. the CAF clarifire concetrates the solids to about 15- 20 % . using minimum space and time. It also remove micro particles in floatation process making water clean enough for irrigation purpose. While the solids move to belt press. This equipment filter out water and press the solid to quize out maximum amount of water. As its a continus process and robust it requires little attention compare to decanter or centrifuges. Also it requires less space then clarifire.

We have supplied this systems to news print and corn processing plants.

If you need any information contact me on

fairtech@indiatimes.com

ketan ■

This reply is probably late to aid in the solution to your development.

I have seen a machine in a dairy in California that had a inclined conveyor where the belt was some type of screen moving upward very slowly.

It removed the solids because there was a substantial pile of menure at the discharge of the conveyor.

I didn't pay much attention to the operation.



Antonio Reis

Vitrom Mfg Consultants

Your Process and Manufacturing Solutions

Phone: 209.834.1900

Fax: 209.834.1039

www.vitrom.com ■