Digesters

Manure digesters face impossible task

Manure digesters in California are facing the strictest regulation yet. The San Joaquin Valley Air Pollution Control District is mandating an emissions standard of nine parts per million Nitrogen Oxides or NOx that existing digester technology has never conclusively met. NOx combines with volatile organic compounds to form ozone, and the Air District has been faced with the challenge of reducing all NOx emissions. 

New and existing digesters would have to add air pollution control technology to engine generators or face forced shutdown. “This means huge up front costs and expensive operating and maintenance costs,” says Allen Dusault with Sustainable Conservation. Digesters could still be operated and gas flared, but no electricity produced. The purpose of the digester would be defeated. 

DairyCast 0099c for October 4 2007

Download mp3DairyCast 0099c Show Notes:

  • Alpha BioSystems continues to research and improve aerobic digestion systems in light of environmental regs
  • Mycogen's Jon Erickson looks at fields, yields and management

DairyCast 0079 for July 24 2007

DairyCast 0079 Show Notes:

  • Interviewing that next potential hire.. dive deep!
  • Recent price strength explained
  • Sweden's success with digester-sourced energy
  • Mike Hutjens looks at producer use of biofuels by-products
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