Robinway Dairy in Kiel Wisconsin

Water Quality So Good Your Can Drink It

Dairy Overview:

1700 cows + 350 steers
A flush dairy and their nutrient recovery/flush water management system that utilizes our LWR system
Dairy processes 80,000 gals/day of flush water producing 20 tons/day of manure cake

This video provides a live tour of the 1st Wave System, manufactured by our partner LWR Systems.

1st Wave Unit- Initial Flush Water Treatment

Flush water, after it has gone through a slope screen separator comes into the unit at the bottom left hand corner of the picture and flows as
the arrows point.

Step 1: Slope Screen Separation
Bedding is separated from incoming flush water by slope screen separators. The flush water at that point has a total suspended solids content (TSS) of about 20,000 and it looks like the water that you see in the container to the left in the picture below.

Step 2: Flocculation
Polymer is added to the manure and mixed. The manure now forms large flocs making it easier to separate.

Step 3: Water Separation
The water then travels down a separator screen (from the top left hand corner to the bottom right). At this point, water is separated from the manure and the resulting water looks like the product you see below. It will have a 50% reduction in nitrogen and 99% reduction of phosphorus compared to the initial flush water. This water is ready for pivot, drip irrigation or to be recycled back to your flush system. The need for large lagoons for settling is eliminated as all the manure has been separated out instantly. The virtual total elimination of salts will also help you preserve farm health.

Step 4: Manure Cake Formation
The flocculated manure is squeezed with a rotary press into a “cake”. It contains 99% phosphorus and 50% of nitrogen found in the original flush water. This manure cake can then be used on your farmland or easily trucked to offsite farms.

Step 5 – 2nd Wave Reverse Osmosis System
If further water clarification is needed, the 2nd Wave Reverse Osmosis (RO) system can be installed. This system will get the flush water back to water for your herds, parlor water or for your fields.

Step 6: Manure Pellet Processing
For further processing, manure cake can be dried.