Product and Economic Analysis of Direct Liquefaction of Swine Manure
Tóm tắt
Direct hydrothermal liquefaction of biomass is a technology that has shown promising results in treating waste and producing oil. A batch hydrothermal liquefaction system was used to treat swine manure, and it successfully converted up to 70% of swine manure volatile solids into oil and reduced manure chemical oxygen demand by up to 75% (He et al., Trans ASAE 43(6):1827–1833, 2000). A continuous-flow reactor was developed and resulted in similar conversion rates to the batch process, indicating the potential for scale-up (Ocfemia, 2005). This study investigates the hydrothermal process in relation to a livestock system to determine the impact on oil yields and fertilizer values that might be realized in a farm-scale application. Oil products from the hydrothermal process are maximized using manure containing around 20% solids, but typical swine confinement facilities contain wetter manure slurries. A preliminary investigation of liquid–solid separation methods was conducted to determine the resultant oil yields and the effects of the hydrothermal process on fertilizer values in the wastewater as compared to the unprocessed manure. Energy and economic analyses of the liquid–solid separation and hydrothermal liquefaction processes were also conducted. The hydrothermal process results in an oil product as well as a fertilizer product that retains the majority of its nitrogen value with a reduced level of phosphorus (as compared to the unprocessed swine manure). The economic analyses indicate feasibility for several different liquid–solid separation methods, dependent on the equipment and maintenance costs assumed for each method. Conveyor-belt manure collection systems in conjunction with hydrothermal liquefaction are especially promising.
Tài liệu tham khảo
Aarnink A, Sutton A, Cahn T, Verstegen M, Langhout D (1998) Dietary factors affecting ammonia and odour release from pig manure. In: Lyons TP, Jacques KA (eds) Biotechnology in the feed industry. Proceedings of the Alltech’s 14th annual symposium. Nottingham University Press, Nottingham, pp 45–59
Appleford JM (2004) Analysis and optimization of the thermochemical conversion process to produce oil from biomass. Master’s thesis. University of Illinois at Urbana-Champaign, Department of Agricultural Engineering, Urbana, IL
ASTM (2004a) ASTM D95-99. Standard test method for water in petroleum products and bituminous materials by distillation. In: Annual book of ASTM standards. Am. Soc. for Testing Materials, West Conshohocken
ASTM (2004b) ASTM D473-02. Standard test method for sediment in crude oils and fuel oils by the extraction. In: Annual book of ASTM standards. Am. Soc. for Testing Materials, West Conshohocken
ASTM (2004c) ASTM D4072-98. Standard test method for toluene-insoluble (TI) content of tar and pitch. In: Annual book of ASTM standards. Am. Soc. for Testing Materials, West Conshohocken
Brechbill S, Tyner W (2008) The economics of renewable energy: corn stover and switchgrass. Purdue Extension Bioenergy Newsletter, ID-404-W. Purdue University, Department of Agricultural Economics, West Lafayette
Chastain JP, Lucas WD, Albrecht JE, Pardue JC, Adams Iii J, Moore KP (2001) Removal of solids and major plant nutrients from swine manure using a screw press separator. Appl Eng Agric 17(3):355–363
Dong R et al (2009) Product distribution and implication of hydrothermal conversion of swine manure at low temperatures. Trans ASABE 52(4):1239–1248
Elliott DC et al (1994) Chemical processing in high-pressure aqueous environments: continuous-flow reactor process development experiments for organics destruction. Ind Eng Chem Res 33:566–574
Fini K et al (2011) Chemical characterization of bio-binder from swine manure: a sustainable modifier for asphalt binder. J Mater Civ Eng. doi:10.1061/(ASCE)MT.1943-5533.0000237
Fulhage C, Pfost D (2001) Swine manure management systems in Missouri. University of Missouri—Columbia Extension, Columbia
He BJ (2000) Thermochemical conversion of swine manure to produce oil and reduce waste. Ph.D. dissertation. University of Illinois at Urbana-Champaign, Department of Agricultural Engineering, Urbana, IL
He BJ, Zhang Y, Yin Y, Funk TL, Riskowski GL (2000) Operating temperature and retention time effects on the thermochemical conversion process of swine manure. Trans ASAE 43(6):1821–1825
He BJ, Zhang Y, Funk TL, Riskowski GL, Yin Y (2000) Thermochemical conversion of swine manure: an alternative process for waste treatment and renewable energy production. Trans ASAE 43(6):1827–1833
He B, Zhang Y, Yin Y, Funk TL, Riskowski GL (2001) Effects of feedstock pH, initial CO addition, and total solids content on the thermochemical conversion process of swine manure. Trans ASAE 44(3):697–701
He BJ, Zhang Y, Yin Y, Funk TL, Riskowski GL (2001) Effects of alternative process gases on the thermochemical conversion process of swine manure. Trans ASAE 44(6):1873–1880
He BJ, Zhang Y, Yin Y, Funk TL, Riskowski GL (2001) Preliminary characterization of raw oil products from the thermochemical conversion of swine manure. Trans ASAE 44(6):1865–1871
Kaspers B, Koger J, van Kempen T (2000) An alternative approach to manure collection: the conveyor belt system. NC Cooperative Extension Service, Swine News; Vol:23(10)
Khanna M, Dhungana B, Clifton-Brow J (2008) Costs of producing miscanthus and switchgrass for bioenergy in Illinois. Biomass Bioenergy 32:482–493
Moran MJ, Shapiro HN (2008) Fundamentals of engineering thermodynamics, 6th edn. Wiley, Hoboken
North Carolina Department of Transportation, Pavement Construction Section (2011) Monthly terminal asphalt binder and fuel FOB prices. Raleigh, NC. Available at: http://www.ncdot.org/doh/operations/dp_chief_eng/constructionunit/atp.html
Ocfemia K (2005) Hydrothermal process of swine manure to oil using a continuous reactor system. Ph.D. dissertation. University of Illinois at Urbana-Champaign, Department of Agricultural Engineering, Urbana, IL
Ocfemia KS, Zhang Y, Funk T (2006) Hydrothermal processing of swine manure to oil using a continuous reactor system: effects of operating parameters on oil yield and quality. Trans ASABE 49(6):1897–1904
Song C, Hu H, Zhu S, Wang G, Chen G (2004) Nonisothermal catalytic liquefaction of corn stalk in subcritical and supercritical water. Energy Fuels 18:90e6
U.S. Energy Information Administration (2011) U.S. Natural Gas Prices. Retrieved July 15, 2011, from U.S. Energy Information Administration Natural Gas Prices: http://www.eia.doe.gov/dnav/ng/ng_pri_sum_dcu_nus_m.htm
U.S. Energy Information Administration (2011) U.S. Crude Oil Prices. Retrieved July 15, 2011, from U.S. Energy Information Administration Petroleum and Other Liquids Spot Prices. http://www.eia.doe.gov/dnav/pet/pet_pri_spt_s1_m.htm
Zhang RH, Westerman PW (1997) Solid–liquid separation of animal manure for odor control and nutrient management. Appl Eng Agric 13(5):657–664