Publications

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Sommer, S. G. (2012). Biochemical methane potential and anaerobic biodegradability of non-herbaceous and herbaceous phytomass in biogas production. Bioresource Technology, 125(226-232).

Sommer, S. G. (2012). Biotechnology for efficient and environmentally friendly manure management. In S.-N. Lee & R. G. Mangubat (Eds.), Sustainable Resource Managment of Livestock and Poultry Waste for Asian Small-scale Farmers (pp. 1-11)

Sommer, S. G. (2012). Gær producerer insulin for milliarder. In S. D. Emkjær (Ed.), BIOTEK 2 – Anvendt bioteknologi (pp. 122-147). Lindhardt & Ringhof.

Sommer, S. G. (2012). Gaseous emissions during the management of solid manures. Agronomy for Sustainable Development, 8, 67-106. Article 8.

Sommer, S. G. (2012). Indicators of physical properties and plant nutrient content of animal slurry and separated slurry. Biological Engineering Transactions, 5, 123-135.

Sommer, S. G. (2012). Management model for assessment of nitrogen flow from feed to pig manure after storage in Vietnam. Environmental Technology, 33(6), 725-731. https://doi.org/10.1080/09593330.2011.592223

Sommer, S. G. (2012). Manure management practices on biogas and non-biogas pig farms in developing countries - using livestock farms in Vietnam as an example. Journal of Cleaner Production, 27, 64-71. https://doi.org/10.1016/j.jclepro.2012.01.006

Sommer, S. G. (2012). Methane productivity and algorithms for psychrophilic simple biogas digester. In Fourth International Symposium On Energy From Biomass and Waste, San Servolo, Venice (Italy)

Sommer, S. G. (2012). New technologies to recycle phosphor. Abstract from Nitrate conferne, København, Denmark.

Sommer, S. G. (2012). Potential of plant waste for biomethane production: Characteristic biomethane production potential and anaearobic digestibility. In Fourth International Symposium On Energy From Biomass and Waste, San Servolo, Venice (Italy)

Sommer, S. G. (2012). Proton activity - the missing link in predicting ammonia and odour emission from manure (Eds. Aubree R. et al.). Paper presented at International Symposium on Emission of Gas and Dust from Livestock (EmiLi), June 10-13, 2012, Saint-Malo, France, Saint Malo, France.

Sommer, S. G. & Morthorst, P. E. (2012). Robust og bæredygtig bioenergi. In T. Skøtt (Ed.), Robust og bæredygtig bioenergi: Biomasse i fremtidens danske energisystem (pp. 4-5). BioPress.

Sommer, S. G. (2012). Validation and recommendation of methods to measure biogas production potential. In The 15th AAAP Animal Science Congress, Thailand AAAP.

Webb, J., Sommer, S. G., Kupper, T., Groenestein, K., Hutchings, N. J., Eurich-Menden, B., Rodhe, L., Misselbrook, T. H. & Amon, B. (2012). Emissions of ammonia, nitrous oxide and methane during the management of solid manures. Sustainable Agriculture Reviews, 8, 67-107. https://doi.org/10.1007/978-94-007-1905-7_4

Petersen, S. O. & Sommer, S. G. (2011). Ammonia and nitrous oxide interactions: Roles of manure organic matter management. Animal Feed Science and Technology, 166-167, 503-513. https://doi.org/10.1016/j.anifeedsci.2011.04.077

Quaye, A. K., Volk, T. A., Hafner, S., Leopold, D. J. & Schirmer, C. (2011). Impacts of paper sludge and manure on soil and biomass production of willow. Biomass and Bioenergy, 35(7), 2796-2806. https://doi.org/10.1016/j.biombioe.2011.03.008

Rotz, C. A. & Hafner, S. D. (2011). Whole farm impact of anaerobic digestion and biogas use on a New York dairy farm. In American Society of Agricultural and Biological Engineers Annual International Meeting 2011, ASABE 2011 (Vol. 6, pp. 5220-5231). American Society of Agricultural and Biological Engineers.

Sommer, S. G. (2011). A review of the biogas industry in China. Energy Policy, 39(10), 6073-6081.

Sommer, S. G. (2011). Effect of incineration temperature on phosphorus availability in bio-ash from manure. Environmental Technology, 32(6), 633-638. https://doi.org/10.1080/09593330.2010.509355

Sommer, S. G. (2011). Influence of lignocellulose on biochemical methane potential and biodegradability for animal manure and energy crop. Abstract from I. International Conference on Biogas Microbiology, Leipzig, Germany.

Sommer, S. G. (2011). Manure management: implications for greenhouse gas emissions. Animal Feed Science and Technology, 166-167(23 June), 514-531. https://doi.org/10.1016/j.anifeedsci.2011.04.036

Sommer, S. G. (2011). Nitrogen turnover and loss during storage of slurry and composting of solid manure under typical Vietnamese farming conditions. Journal of Agricultural Science, 149, 285–296. https://doi.org/10.1017/S0021859610000699

Sommer, S. G. (2011). Physical properties, fuel characteristics and P-fertilizer production related to animal slurry and products from separation of animal slurry. Abstract from njf seminar 443, Falköping, Sweden.

Sommer, S. G. (2011). Solid-Liquid Separation of Animal Slurry in Theory and Practise: A Review. In E. Lichtfouse, M. Hamelin, M. Navarrete & P. Debaeke (Eds.), Sustainable Agriculture (1 ed., Vol. 2, pp. 953-986). Springer.

Tran, M. T., Vu, T. K. V., Sommer, S. G. & Jensen, L. S. (2011). Gaseous Loss of Nitrogen from Pig Manure during Slurry Storage and Composting under Typical Vietnamese Farming Conditions. Journal of Agricultural Science, 149, 285-296.

Triolo, J. M., Sommer, S. G., Møller, H. B., Weisbjerg, M. R. & Jiang, X. Y. (2011). A new algorithm to characterize biodegradability of biomass during anaerobic digestion: Influence of lignin concentration on methane production potential. Bioresource Technology, 102, 9395-9402. https://doi.org/10.1016/j.biortech.2011.07.026

Triolo, J. M., Sommer, S. G., Møller, H. B., Weisbjerg, M. R. & Jiang, X. (2011). Influence of lignin on biochemical methane potential of biomass for biogas production. Current Opinion in Biotechnology, 22(Supplement 1), 146. https://doi.org/10.1016/j.copbio.2011.05.484

Triolo, J. M., Sommer, S. G. & Møller, H. B. (2011). Ny metode til bestemmelse af gaspotentialet i biomasse. Forskning i Bioenergi, Marts 2011(35), 6-7.

Borum, F. L., Lind Damkjær, D., Falkenberg, H., Overgaard, K. & Sommer, S. G. (Eds.) (2010). Biotek: 12 cases om miljø og teknologisk udvikling. L&R Uddannelse.

Chadwick, D., Cardenas, L., Misselbrook, T., Sommer, S. G., Amon, B. & Fangueiro, D. (2010). Manure management: implications for nitrous oxide and methane emissions. In McGinn (Ed.), The Greenhouse Gases and Animal Agriculture conference

El-Mashad, H. M., Zhang, R., Rumsey, T., Hafner, S., Montes, F., Rotz, C. A., Arteaga, V., Zhao, Y. & Mitloehner, F. M. (2010). A mass transfer model of ethanol emission from thin layers of corn silage. In ASABE - International Symposium on Air Quality and Waste Management for Agriculture 2010 (pp. 107-114)

El-Mashad, H. M., Zhang, R., Hafner, S., Montes, F., Rotz, C. A., Arteaga, V., Zhao, Y. & Mitloehner, F. M. (2010). A mass transfer model of ethanol emission from thin layers of corn silage. Transactions of the ASABE, 53(6), 1903-1909.

Farrell, J. M., Murry, B. A., Leopold, D. J., Halpern, A., Rippke, M. B., Godwin, K. S. & Hafner, S. D. (2010). Water-level regulation and coastal wetland vegetation in the upper St. Lawrence River: Inferences from historical aerial imagery, seed banks, and Typha dynamics. Hydrobiologia, 647(1), 127-144. https://doi.org/10.1007/s10750-009-0035-z

Hafner, S. D., Montes, F., Rotz, C. A. & Mitloehner, F. M. (2010). A farm-level model of VOC emission from silage. In ASABE - International Symposium on Air Quality and Waste Management for Agriculture 2010 (pp. 446-453)

Hafner, S. D., Montes, F. & Rotz, C. A. (2010). Effects of carbon dioxide emission, kinetically-limited reactions, and diffusive transport on ammonia emission from manure. In American Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010 (Vol. 3, pp. 2506-2525). American Society of Agricultural and Biological Engineers.

Hafner, S. D., Montes, F., Rotz, C. A. & Mitloehner, F. (2010). Ethanol emission from loose corn silage and exposed silage particles. Atmospheric Environment, 44(34), 4172-4180. https://doi.org/10.1016/j.atmosenv.2010.07.029

Montes, F., Hafner, S. D., Rotz, C. A. & Mitloehner, F. M. (2010). Temperature and air velocity effects on ethanol emission from corn silage with the characteristics of an exposed silo face. Atmospheric Environment, 44(16), 1987-1995. https://doi.org/10.1016/j.atmosenv.2010.02.037

Overgaard, K. & Sommer, S. G. (2010). Bioteknologi og bæredygtig udvikling. In S. Gjedde Sommer, K. Overgaard, F. L. Borum, D. L. Damkjær & H. Falkenberg (Eds.), Biotek – 12 cases om miljø og teknologisk udvikling (pp. 6-30). L&R Uddannelse.

Petersen, S. O. & Sommer, S. G. (2010). Ammonia and nitrous oxide interactions - the role of manure organic matter management. In McGinn (Ed.), Proceeding article Greenhouse gas and Animal Agriculture Conference

Sommer, S. G. (2010). A comprehensive model to estimate the simultaneous release of acidic and basic gaseous pollutants from swine slurry under different scenarios. Chemistry and Ecology, 26(6), 425-444. https://doi.org/10.1080/02757540.2010.504663

Sommer, S. G. (2010). Ammoniak forurening - Bioteknologi reducerer fordampning fra husdyrgødning. In S. G. Sommer, K. Overgaard, F. L. Borum, D. L. Damkjær & H. Falkenberg (Eds.), Biotek – 12 cases om miljø og teknologisk udvikling (pp. 133-147).

Sommer, S. G. (2010). Ammoniak forurening – Reduceres med ny teknologi. In S. Gjedde Sommer, K. Overgaard, F. L. Borum, D. L. Damkjær & H. Falkenberg (Eds.), Biotek – 12 cases om miljø og teknologisk udvikling (pp. 133-147). L&R Uddannelse.

Sommer, S. G. (2010). Biogas kan reducere drivhusgasudledningen. In S. G. Sommer, K. Overgaard, F. L. Borum, D. L. Damkjær & H. Falkenberg (Eds.), Biotek – 12 cases om miljø og teknologisk udvikling (pp. 43-58).

Sommer, S. G. (2010). Grøn energi fra biogas. In S. G. Sommer, K. Overgaard, F. L. Borum, D. L. Damkjær & H. Falkenberg (Eds.), Biotek – 12 cases om miljø og teknologisk udvikling (pp. 59-72).

Sommer, S. G. (2010). Solid-liquid separation of animal slurry in theory and practise: A review. Agronomy for Sustainable Development, 30(1), 153-180. https://doi.org/10.1051/agro/2009013

Van, V. T. K., Sommer, S. G., Vu, C. C. & Jørgensen, H. (2010). Assessing Nitrogen and Phosphorus in Excreta from Grower-finisher Pigs Fed Prevalent Rations in Vietnam. Asian-Australasian Journal of Animal Sciences, 23(2), 279-286.

Blanes-Vidal, V., Sommer, S. G. & Nadimi, E. S. (2009). Modeling the Release of Gas and Odorous Compounds (H₂S, CH ₃COOH, NH₃ and CO₂) from Swine Slurry. In American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009 (pp. 822-831)

Hafner, S. D., Montes, F. & Rotz, C. A. (2009). Modeling emissions of volatile organic compounds from silage. In American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009 (Vol. 3, pp. 1895-1911)

Hafner, S. D. & Bisogni, J. J. (2009). Modeling of ammonia speciation in anaerobic digesters. Water Research, 43(17), 4105-4114. https://doi.org/10.1016/j.watres.2009.05.044

Hjorth, M., Nielsen, A. M., Nyord, T., Hansen, M. N., Nissen, P. & Sommer, S. G. (2009). Nutrient value, odour emission and energy production of manure as influenced by anaerobic digestion and separation. Agronomy for Sustainable Development, 29, 329-338. https://doi.org/10.1051/agro:2008047

Displaying results 201 to 250 out of 569

Revised 18.03.2026

Sasha D. Hafner