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Food Science 2019

November 11-12, 2019

Food Science and Technology

November 11-12, 2019 | London, UK

3

rd

International Conference on

Volume 3

Applied Food Science Journal

Appl Food Sci J. | Volume 3

Conversion of lignocellulose including biosolids and green waste to Biogas

Conly Hansen

Utah State University, USA

L

ignocellulosic biomass is the most abundantly available raw material on the Earth for the production of biofuels.

The conversion of lignocellulose into renewable energy and more valuable chemicals has been limited. Several

methods for increasing the conversion of lignocellulose into energy by pretreating the feedstock have been developed,

but all of the existing methods have large economic penalties, e.g. disposal of toxic wastes and greatly increased capital

and operating costs. The discovery and characterization of Caldicellulosiruptor microbes; extremophilic organisms

capable of solubilizing lignocellulose, suggested a possible solution to the economic problem of pretreatment. Beginning

in 2014, recognizing the potential for anaerobic digestion of lignocellulose for biogas production, a multidisciplinary

team including a biochemist, chemist, microbiologist and agricultural engineer, from Brigham Young and Utah State

Universities has been conducting experiments to determine if we could break down lignocellulose feedstocks for later

anaerobic digestion. The definition of breakdown in this case means conversion of organic solids in a high temperature

vessel (175°C) containing Caldicellulosiruptor bescii into a type of tea that contains mostly acetate and lactate in water.

Results to date indicate nearly 90% breakdown in 18 – 24 hrs. of certain plant materials including grass and leaves

collected at municipal sanitary landfills. Perhaps the most significant results were that brewery waste that is somewhat

refractory to anaerobic treatment could be partially broken down (50%) and even aerobic sludge from a wastewater

treatment plant that was previously anaerobically digested in a mesophilic process and sun dried could be further broken

down (additional nearly 40% destruction). This presentation will report the results of work we have done to take the

process from the lab to the market; the hurdles to scaling and commercializing the anaerobic digestion of lignocellulose

in an economically viable way.