[lafroste]

Why remove the nitrogen? Leave it in, sell the water to farmers to spread on crops, cheaper than buying fertilizer.

You clearly have not been exposed to the joys of the Clean Water Act and ammendments. The biggest problem with your suggestion is the daily volume of water involved. It would be impractical to transport several hundred thousand gallons per day. Also, there are strict regulations in place for land irrigation in order to avoid runoff. Second, its illegal to irrigate crops for human or animal consumption with treated wastewater without jumping through mucho hoops first (if even then).

[porte des morts]

But aren't the byproducts 99.9999% pathogen free.?

[porte des morts]

also from the above article; He no longer has to buy commercial fertilizer for his farm fields, and he can spread the liquid manure all summer long rather than waiting until fall.

They seem to be doing it in WI.Your'e problem may be in the amount of water coming from pig effluent as opposed to cow. Is there a way to evaporate the majority of the water to leave a usable product?