Liming an anaerobic cheese whey digester

E. J. Fox, C. J. Clanton, P. R. Goodrich, B. D. Backus, H. A. Morris

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A 6-L digester was used to investigate how lime affected anaerobic digestion of sweet cheese whey. The lime-buffered digester was operated at 6.40-, 4.20- and 3.25-day hydraulic retention times (RT). Calcium concentrations ranged from 5540 mg·L-1 at 6.40-day RT to 24 900 mg·L-1 at a 3.25-day RT. The digester had a COD reduction of 40 and 61% at RT of 3.25 and 6.40 days. The digester produced an average of 1790 L CH4·m-3·d-1, 13.9 times the average production of similar non-lime-buffered digesters, with an average of 82% CH4 in the biogas.

Original languageEnglish (US)
Pages (from-to)269-274
Number of pages6
JournalTransactions of the American Society of Agricultural Engineers
Volume35
Issue number1
StatePublished - Jan 1 1992

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