Wisconsin May Increase Manure Digester Funding
The state of Wisconsin may pour $10 to $20 million into the increased use of manure digesters, in an effort to both produce electricity and better manage manure nutrients, reports the Milwaukee Journal.
One of the reasons digesters have fallen out of favor with farmers is that the electricity reimbursement rates they receive typically don’t cover the cost of operating the often fickle equipment.
Plus, methane digestion alone does nothing to reduce phosphorus levels in the digested solids. Further separation technology, adding even more costs, is required to do that.
But state officials seem hopeful methane digestion could be useful, particularly in northeast Wisconsin. There, shallow top soils and over application of liquid manure are being cited for groundwater contamination.