Submitted to: American Chemical Society National Meeting
Publication Type: Abstract Only
Publication Acceptance Date: November 18, 2005
Publication Date: March 26, 2006
Citation: Widmer, W.W., Manthey, J.A., Cameron, R.G. 2006. Healthy products from citrus juice processing waste streams. American Chemical Society National Meeting. Paper No. AGFD18. Technical Abstract: Citrus waste streams contain significant amounts of simple sugars, flavonoids and dietary fiber as cellulose, hemicellulose, and pectin. A process has been developed to convert sugars and cellulose (after enzyme hydrolysis) into ethanol through fermentation for use as a biofuel. Pectin is hydrolyzed using food grade enzymes into short chain pectin fragments to facilitate fermentation. Short chain oligomers from citrus pectin have been shown previously to have high pre-biotic activity and the process is under refinement to optimize the pre-biotic activity of these oligomers. Additionally, citrus flavonoids which have been shown to exhibit many health benefits are released and concentrated from the waste stream matrix, facilitating recovery of these components. An alternative to hydrolyzing the fiber in citrus waste is to remove sugars and bitter components to produce a bland food grade dietary fiber. Problems and progress towards realizing production of these healthy by-products will be discussed.