Municipal anaerobic digesters for codigestion, energy recovery, and greenhouse gas reductions

Water Environment Research : a Research Publication of the Water Environment Federation
D ZitomerDennis Dineen

Abstract

Codigestion of five wastes and municipal wastewater sludge was evaluated using full-scale testing. Synergistic, antagonistic, and neutral outcomes were observed depending on codigestate identity and concentration, highlighting the value of careful blending. Yeast waste resulted in notable synergism, increasing biogas production by over 50%, whereas aircraft deicing waste resulted in antagonism at high loadings and neutral outcomes at lower loadings. Restaurant waste codigestion resulted in neutral outcomes. The synergisim with yeast codigestates may have resulted from trace nutrients (i.e., iron, nickel, and cobalt) in the wastes that increased microbiological activity. Antagonist outcomes with deicing waste may have been the result of organic overload or inhibitory deicer constituents. Codigestion of wastes at the feed rates investigated was estimated to produce 0.50 ML/d of methane having an energy equivalent of 17 500 MJ/d. This was estimated to reduce net carbon dioxide emissions by 560 tonnes/y.

References

Jan 11, 2001·Applied Microbiology and Biotechnology·L BjörnssonB Mattiasson
Feb 9, 2002·Water Environment Research : a Research Publication of the Water Environment Federation·D ZitomerJ Schilling
Jun 10, 2003·Applied Biochemistry and Biotechnology·I Angelidaki, L Ellegaard
Oct 4, 2003·Environmental Science & Technology·Steven R CorsiDevon A Cancilla
Aug 10, 2006·Water Environment Research : a Research Publication of the Water Environment Federation·Felipe Alatriste-MondragónReza Iranpour
Aug 31, 2006·Water Science and Technology : a Journal of the International Association on Water Pollution Research·I LópezL Borzacconi

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Citations

Mar 1, 2011·Critical Reviews in Biotechnology·Joan Mata-AlvarezSergi Astals

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