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Enhancing Dairy Lagoon Performance With Highrate Anaerobic Digesters by G. L. Hawkins, ; D. R. Raman, ; R. T. Burns, ; R. E. Yoder, ; T. L. Cross, is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Enhancing Dairy Lagoon Performance With Highrate Anaerobic Digesters about?

In a two-stage study, the possibility of using high-rate anaerobic digesters to enhance the performance of dairy lagoons was explored. Four anaerobic sequencing batch reactors (ASBR) and four downflow anaerobic filters (DFAF) were tested, with two of each type operated at 255 C, and the other two at 355 C. The first stage of the experiment explored using the high-rate digesters on liquid effluent from a screw-press treating dairy manure slurry. The first-stage experiment demonstrated that settling processes, rather than biodegradation, accounted for most of the organic matter reduction in both reactor types, when operated at a 0.5-d hydraulic retention time. Specifically, settling accounted for an average of 100% of the chemical oxygen demand (COD) removal in the ASBR reactors, and for an average of 72% of the COD removal in the DFAF reactors. These results prompted the second stage of the experiment, which explored the possibility of using the reactors to remove volatile fatty acids (VFAs) from dairy lagoon supernatant. Diluted manure slurry was spiked with acetic acid (HAc) to simulate the supernatant of an overloaded lagoon. At VFA loading rates of 1.0 and 3.0 kg HAc m -3 d -1 ,

Who reads Enhancing Dairy Lagoon Performance With Highrate Anaerobic Digesters?

Author

G. L. Hawkins, ; D. R. Raman, ; R. T. Burns, ; R. E. Yoder, ; T. L. Cross,

Publisher

American Society of Agricultural and Biological Engineers; American Society of Agricultural Engineers; American Society of Agricultural and Biological Engineers (ASABE) (ISSN 0001-2351)

Published

2001

Language

EN

Field

Agricultural and Biological Sciences (Physical Sciences)