Dry anaerobic digestion of high solids content dairy manure at high organic loading rates in psychrophilic sequence batch reactor

Applied Microbiology and Biotechnology
Daniel I Massé, Noori M Cata Saady

Abstract

Cow manure with bedding is renewable organic biomass available around the year on dairy farms. Developing efficient and cost-effective psychrophilic dry anaerobic digestion (PDAD) processes could contribute to solving farm-related environmental, energy, and manure management problems in cold-climate regions. This study was to increase the organic loading rate (OLR), fed to a novel psychrophilic (20 °C) dry anaerobic digestion of 27% total solid dairy manure (cow feces and wheat straw) in sequence batch reactor (PDAD-SBR), by 133 to 160%. The PDAD-SBR process operated at treatment cycle length of 21 days and OLR of 7.0 and 8.0 g total chemical oxygen demand (TCOD) kg(-1) inoculum day(-1) (5.2 ± 0.1 and 5.8 ± 0.0 g volatile solids (VS) kg(-1) inoculum day(-1)) for four successive cycles (84 days) produced average specific methane yields (SMYs) of 147.1 ± 17.2 and 143.2 ± 11.7 normalized liters (NL) CH4 kg(-1) VS fed, respectively. PDAD of cow feces and wheat straw is possible with VS-based inoculum-to-substrate ratio of 1.45 at OLR of 8.0 g TCOD kg(-1) inoculum day(-1). Hydrolysis was the limiting step reaction. The VS removal averaged around 57.4 ± 0.5 and 60.5 ± 5.7% at OLR 7.0 and 8.0 g TCOD kg(-1) inoculum day(-1), respectively.

References

Oct 31, 2003·Bioresource Technology·Zhiyou WenShulin Chen
Mar 27, 2007·Bioresource Technology·Sigrid KuschThomas Jungbluth
Oct 1, 1985·Biotechnology and Bioengineering·T NoikeJ Matsumoto
Jul 23, 2011·Bioprocess and Biosystems Engineering·Jean-Claude FrigonSerge R Guiot
Mar 6, 2012·Bioresource Technology·Amel Abbassi-GuendouzRenaud Escudié
Jun 26, 2013·Bioresource Technology·Noori M Cata Saady, Daniel I Massé
Dec 2, 2014·Waste Management·Daniel I Massé, Noori M Cata Saady

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Citations

Oct 10, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Valentine Nkongndem NkemkaXiying Hao

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