Manure digesters could be an option for small farms – The Country Today: Farm

There are about 35 anaer­o­bic di­gesters in op­er­a­tion on Wis­con­sin farms, but most are on farms with 800 or more cows. Brian Lan­golf, di­rec­tor of bio­gas sys­tems and re­search de­vel­op­ment at UW-Oshkosh, thinks there is op­por­tu­nity for di­gesters on small farms.

Lan­golf said there are about 1.5 mil­lion cows and al­most 1,000 reg­is­tered dairy farms. The av­er­age herd size is about 117 cows.

“Even though there are some very large (con­cen­trated an­i­mal feed­ing op­er­a­tions) and more CAFOs be­ing de­vel­oped, there is still a tremen­dous op­por­tu­nity for small farms in Wis­con­sin,” Lan­golf said. “Anaer­o­bic di­ges­tion pro­vides the op­por­tu­nity to bet­ter man­age that ma­nure and other op­por­tu­ni­ties for other rev­enue streams for farms through elec­tric gen­er­a­tion.”

Lan­golf was a pre­sen­ter March 10 in Stevens Point at one of four or­ganic waste stream man­age­ment pro­grams planned around the state in March.

Over the past decade, the face of the UW-Oshkosh cam­pus has changed con­sid­er­ably with the ad­di­tion of geo­ther­mal heat­ing sys­tems for cam­pus build­ings, green rooftops, pho­to­voltaic ar­rays, so­lar heat and en­ergy ef­fi­cient cer­ti­fied build­ing projects, so it is a nat­u­ral step to move into anaer­o­bic di­ges­tions projects, Lan­golf said.

via Manure digesters could be an option for small farms – The Country Today: Farm.