Anaerobic Digestion (Biogas) Publications
Chapter 3 in Climate Friendly Farming: Improving the Carbon Footprint of Agriculture in the Pacific Northwest. Full report available at http://csanr.wsu.edu/pages/Climate_Friendly_Farming_Final_Report/.
Chapter 12 in Climate Friendly Farming: Improving the Carbon Footprint of Agriculture in the Pacific Northwest. Full report available at http://csanr.wsu.edu/pages/Climate_Friendly_Farming_Final_Report/.
Chapter 11 in Climate Friendly Farming: Improving the Carbon Footprint of Agriculture in the Pacific Northwest. Full report available at http://csanr.wsu.edu/pages/Climate_Friendly_Farming_Final_Report/.
Chapter 10 in Climate Friendly Farming: Improving the Carbon Footprint of Agriculture in the Pacific Northwest. Full report available at http://csanr.wsu.edu/pages/Climate_Friendly_Farming_Final_Report/.
Chapter 9 in Climate Friendly Farming: Improving the Carbon Footprint of Agriculture in the Pacific Northwest. Full report available at http://csanr.wsu.edu/pages/Climate_Friendly_Farming_Final_Report/.
Featured lectures by CSANR Director Chad Kruger and researcher Lynne Carpenter-Boggs. PowerPoint presentation and video of event are available.
Bishop, C.P. and C.R. Shumway. Review of Agricultural Economics 31, 3(Fall 2009):394-410.
Organic Waste to Resources Research and Pilot Project Report: Producing Energy and Fertilizer from Organic Municipal Solid Waste: Enhancing Hydrolysis and Bacterial Populations and Mixing and Thermodynamic Modeling of New Solid Waste Treatment Technology
Usama Zaher, Shulin Chen, Chenlin Li, Liang Yu, and Timothy Ewing, June 2009. This project developed, tested and modeled a high solids anaerobic digester consisting of a solids reactor and a leached liquids UASB for reacting volatile fatty acids. At near neutral pH the system improves methane production 50% over existing digesters, while return flow reseeds the solids digester with high titer micro-organisms that improved biological kinetics. The dual reactors system provides for control of digester limiting acid and ammonia processes, while allowing for nutrient recovery, and significantly improves performance for capital outlay.
Detailed CAD drawings for improved version of pilot biogas plant developed at WSU.
Journal of Water Environment Research 81:4.
Organic Waste to Resources Research and Pilot Project Report: Waste to Fuels Technology: Evaluating Three Technology Options and the Economics for Converting Biomass to Fuels
Hayk Khachatryan, Ken Casavant, and Eric Jessup, Jie Chen, Shulin Chen, and Craig Frear, September 2009. This study further investigated biomass from the 2005 biomass inventory by comparing three fuel technologies: cellulosic biomass conversion by fermentation for ethanol, or gasification for mixed-alcohols, and anaerobic digestion of high volatile solids biomass for methane production. The study then integrated the major cost factors: biomass availability, feedstock prices, transportation costs, processing costs, and geographic distribution into a comprehensive model framework using GIS and MATLAB-SIMULINK models, to assess final delivered fuel cost.
Organic Waste to Resources and Pilot Project Report: Biodiesel and Biohydrogen Co-Production with Treatment of High Solid Food Waste
Yubin Zheng, Jingwei Ma, Zhanyou Chi, and Shulin Chen, September 2009. two-step process was developed as a potential technology to produce hydrogen and biodiesel from food waste. The first process use fermentative bacteria to breakdown glucose from food waste to produce hydrogen and volatile fatty acids (VFA). The VFA are then fed to yeast for simultaneous carbon sequestration resulting in production of biodiesel from the oil-producing microbial biomass.
Zaher, U., R. Li, U. Jeppsson, J.P. Steyer, S. Chen (2009). Water Research 43(10), 2717-2727.
Utilization of Re-Processed Anaerobically Digested Fiber from Dairy Manure as a Container Media Substrate
MacConnell, C.B. and Collins, H.P. 2009. Acta Horticulturae (ISHS) 819:279-286
WSU Invention Disclosure.
A special workshop planned by CSANR and hosted by the Department of Ecology Waste 2 Resources Division to feature state-funded research projects relating to the topics of recovering energy and resources (including soil amendments) from organic wastes.
Washington State Agricultural Sector Carbon Market Workgroup (ASCMW).
Includes agenda and presentation slides from Nov 18, 2008 workshop in Sunnyside, WA.
Article in Sustaining the Pacific Northwest Newsletter
Uludag-Demirer, S., Demirer, G.N., Frear, C., Chen,S., (2008). Journal of Environmental Management 86:193-200
Evaluation of a new fixed bed digester design utilizing large size media for flushed dairy manure treatment
Zaher U., Frear C., Pandey, P. and Chen S. (2008). Bioresource Technology 99(18), 8619-8625.
Kruger, C.E., Chen, S., MacConnell, C.B., Harrison, J.H., Shumway, C.R., Zhang, T., Oakley, K., Bishop, C., Frear, C., Davidson, D., and Bowers, K. (2008). Journal of Soil and Water Conservation. 63(1), 12A-13A.
Poster presentation – BIOAg Research Symposium 2008.
Feb 2007. Extension Engaged video broadcast. There are about 250,000 dairy cows in Washington State, and all of them poop. The methane they produce is a powerful greenhouse gas, but also can be captured through anaerobic digestion and used to generate electricity. Learn how WSU is leading the way to making digestion economically feasible by extracting other value-added products from the waste that can provide a financial return to farmers while improving the environment. We’ll look at the state’s only commercial digester in Whatcom County, and at new small digester technology being tested in Pullman. Video provided through RealPlayer; also available through Windows Media Player here.
Liao W., C. Frear and S. Chen, June 2007. This project compiled a literature search for biomass chemical characterization and conducted supplemental laboratory study of forty two feedstocks for 33 parameters such as dry matter, COD, carbohydrates, lipids, elemental and mineral matter, and standard properties such as protein, fiber, pH, etc. A follow-on report will group similar feedstocks, assess potential energy conversion technologies and conduct an economic analysis of feedstock collection and energy production.