[1. Nehrin, R. Traversing the mountaintop: world fossil fuel production to 2050. Philosophical transactions of the Royal Society. Biological sciences, 2009, No. 364 (1532), pp. 3067-3079.]Search in Google Scholar
[2. McKendry, P. Energy production from biomass: overview of biomass. Review paper. Bioresource Technology, 2002, No. 83, pp. 37-46. http://dx.doi.org/10.1016/S0960-8524(01)00118-310.1016/S0960-8524(01)00118-3]Search in Google Scholar
[3. Demirbas, A. Biomass resource facilities and biomass conversion processing for fuels and chemicals. Energy Conversion and Management, 2001, No. 24, pp. 1357-1378. http://dx.doi.org/10.1016/S0196-8904(00)00137-010.1016/S0196-8904(00)00137-0]Search in Google Scholar
[4. Alam, F., Date, A., Rasjidin, R., Mobin, S., Moria, D., Baqui, A. Biofuel from algae - Is it a viable option? Procedia Engineering, 2012, No. 49, pp. 221-227.10.1016/j.proeng.2012.10.131]Search in Google Scholar
[5. Alvadar-Morales, M., Boldrin, A., Karakashev, B., Holdt, S. L., Angelidaki, I., Astrup, T. Life cycle assessment of biofuel production from brown seaweed in Nordic conditions. Bioresource Technology, 2013, No. 129, pp. 92-99. http://dx.doi.org/10.1016/j.biortech.2012.11.02910.1016/j.biortech.2012.11.02923238340]Search in Google Scholar
[6. Debowski, M., Zielinski, M., Grala, A., Dudek, M. Algae biomass as an alternative substrate in biogas production technologies - Review. Renewable and Sustainable Energy Reviews, 2013, No. 27, pp. 596-604. http://dx.doi.org/10.1016/j.rser.2013.07.02910.1016/j.rser.2013.07.029]Search in Google Scholar
[7. Singh, A., Olsen, S. I. A critical review of biochemical conversion, sustainability and life cycle assessment of algal biofuels. Applied Energy, 2011, No. 88, pp. 3548-3555. http://dx.doi.org/10.1016/j.apenergy.2010.12.01210.1016/j.apenergy.2010.12.012]Search in Google Scholar
[8. Bruton, T., Lyons, H., Lerat, Y., Stanley, M., Rasmussen, M. B. A review of the potential of marine algae as a source of biofuel in Ireland. Dublin. Ireland: Sustainable Energy Ireland, 2009.]Search in Google Scholar
[9. Wellinger, A. Algal Biomass - Does it save the world? Short reflections. IEA Bioenergy Task 37 report. 2009, p. 13.]Search in Google Scholar
[10. Kim, S. K. Handbook of Marine Macroalgae: Biotechnology and Applied Physology. USA: Wiley, 2011.http://dx.doi.org/10.1002/978111997708710.1002/9781119977087]Search in Google Scholar
[11. Archer, D., Barber, J. Molecular to global photosynthesis. UK:Imperial College Press, 2004. http://dx.doi.org/10.1142/p21810.1142/p218]Search in Google Scholar
[12. Zamalloa, C., Vulsteke, E., Albrecht, J., Verstraete, W. The technoeconomic potential of renewable energy through the anaerobic digestion of microalgae. Bioresource Technology, 2011, No. 102, pp. 1149-1158. http://dx.doi.org/10.1016/j.biortech.2010.09.01710.1016/j.biortech.2010.09.01720933389]Search in Google Scholar
[13. Lundquist, T. J., Woertz, I. C., Quinn, N. W. T., Benemann, J. R. A realistic Technology and Engineering assessment of algae biofuel production. USA: Energy Biosciences Institute, 2010.]Search in Google Scholar
[14. Resurreccion, E., Colosi, L., White, M., Clarens, A. Comparison of algae cultivation methods for bioenergy production using a combined life cycle assessment and life cycle costing approach. Bioresource Technology, 2012.No. 126, pp. 298-306. http://dx.doi.org/10.1016/j.biortech.2012.09.03810.1016/j.biortech.2012.09.03823117186]Search in Google Scholar
[15. Richardson, J. W., Johnson, M. D., Outlaw, J. L. Economical comparison of open pond raceways to photo bio-reactors for profitable production of algae for transportation fuels in the Southwest. Algal Research, 2012, No. 1, pp. 93-100.10.1016/j.algal.2012.04.001]Search in Google Scholar
[16. Slade, R., Bauen, A. Micro-algae cultivation for biofuels: Cost, energy balance, environmental impacts and future prospects. Biomass and Bioenergy, 2013, No. 53, pp. 29-38. http://dx.doi.org/10.1016/j.biombioe.2012.12.01910.1016/j.biombioe.2012.12.019]Search in Google Scholar
[17. Demirbas, A. Mechanisms of liquefaction and pyrolysis reactions of biomass. Energy Conversion and Management, 2000, No. 41 (6), pp. 633-646.10.1016/S0196-8904(99)00130-2]Search in Google Scholar
[18. Demirbas, A. Biomass resource facilities and biomass conversion processing for fuels and chemicals. Energy Conversion and Management, 2001, No. 24, pp. 1357-1378. http://dx.doi.org/10.1016/S0196-8904(00)00137-010.1016/S0196-8904(00)00137-0]Search in Google Scholar
[19. Dragone, G., Fernandes, B., Vicente, A. A., Teixeira, J. A. Third generation biofuels from microalgae. Communicating Current Research, Technology and Education Topics in Applied Microbiology and Microbial Biotechnology, 2010, No. 2, pp. 1355-1366.]Search in Google Scholar
[20. Bahadar, A., Khan, M. B. Progress in energy from microalgae: A review. Renewable and Sustainable Energy Reviews, 2013, No. 27, pp. 128-148. http://dx.doi.org/10.1016/j.rser.2013.06.02910.1016/j.rser.2013.06.029]Search in Google Scholar
[21. Eroglu, E., Melis, A. Photobiological hydrogen production: Recent advances and state of art. Bioresource Technology, 2011, No. 102, pp. 8403-8413. http://dx.doi.org/10.1016/j.biortech.2011.03.02610.1016/j.biortech.2011.03.02621463932]Search in Google Scholar
[22. Environmental policy strategy 2009-2015. Cabinet order 517. Latvijas Vēstnesis 2009, No. 122 (4108), p. 53.]Search in Google Scholar
[23. Europe 2020. A strategy for smart, sustainable and inclusive growth. EU: European Commission. 2010.]Search in Google Scholar
[24. Kalns, J. [Online] Biogas in Latvia. 2012. [Accessed: 23 January 2014]. Available: http://www.lvportals.lv/likumi-prakse.php?id=251397]Search in Google Scholar
[25. Astill, H., Walker, D., Kiliminster, K., et. al. Macrophytes and macroalgae in the Swan-Canning estuary. River Science, 2010, No. 20, pp. 2-12.]Search in Google Scholar
[26. Freshwater Ecology: Concepts and Environmental Applications. Dodds W.K. USA: Academy Press, 2002.]Search in Google Scholar
[27. Gül, T. Integrated Analysis of Hybrid Systems for Rural Electrification in Developing Countries. M.Sc. Thesis. RIT Division of Land and Water and Water Resources Engineering, Stockholm, Sweden. 2004, p. 117.]Search in Google Scholar
[28. Hwang, C. L., Yoon, K. Multiple Attribute Decision Making: Methods and Applications. Springer-Verlag, Heidelbeg, 1981.10.1007/978-3-642-48318-9]Search in Google Scholar
[29. Tzeng, G. H., Huang, J. J. Multiple Attribute Decision Making: Methods and Applications. United States of America: Taylor & Francis, Boca Raton, 2011.10.1201/b11032]Search in Google Scholar
[30. Körth, H. Zur Berücksichtigung mehrere Zielfunktionen bei der Optimierung von Produktions planen. Mathematik und Wirtschaft, 1969, No. 6, pp. 184-201.]Search in Google Scholar
[31. Pubule, J., Blumberga, A., Romagnoli, F., Blumberga, D. Finding an optimal solution for biowaste management in the Baltic States. In press, Journal of Cleaner Production, 2014. Available online on May 2014.10.1016/j.jclepro.2014.04.053]Search in Google Scholar
[32. Dong, J., Chi, Y., Zou, D., Fu, C., Huang, Q., Ni, M. Energy environment economy assessment of waste management systems from a life cycle perspective: model development and case study. Applied Energy, 2014, No. 114, pp. 400-408. http://dx.doi.org/10.1016/j.apenergy.2013.09.03710.1016/j.apenergy.2013.09.037]Search in Google Scholar
[33. Saaty, T. The analytic hierarchy process. New York: McGraw Hill, 1980.10.21236/ADA214804]Search in Google Scholar
[34. ISO. ISO 14040: Environmental management-Life cycle assessment- Principles and Framework. Geneva: ISP copyright office; 1997]Search in Google Scholar
[35. ISO 14044: Environmental management. Life cycle assessment- requirement and guidelines. International Organization for Standardization, 2006.]Search in Google Scholar
[36. Rodríguez R., Ruyck J. D., Díaz P. R., Verma V. K., Bram S. An LCA based indicator for evaluation of alternative energy routes. Applied Energy, 2011, No. 88(3), pp. 630-635.10.1016/j.apenergy.2010.08.013]Search in Google Scholar
[37. Frischknecht, R., Jungbluth, N., Althaus, H.J., Doka, G., Dones, R., Hischier, R., Hellweg, S., Humbert, S., Margni, M., Nemecek, T., Spielmann, M. Implementation of Life Cycle Impact Assessment Methods: Data v2.0. ecoinvent report No. 3. Switzerland: Swiss center for Life Cycle Inventories, 2007.]Search in Google Scholar
[38. Goedkoop, M., Oele, M., Leijting, J., Ponsioen, T., Meijer, E. Introduction to LCA with SimaPro. The Netherlands: PRe consultants, 2013.]Search in Google Scholar
[39. Goedkoop, M., Oel, M., Schryver, A., Vieira, M. SimaPro Database Manual: Methods Library. The Netherlands: Pre Consultants, 2008.]Search in Google Scholar
[40. Humbert, S., Schryver, A., Bengoa, X., Margni, M., Jolliet, O. IMPACT 2002+: User Guide. Draft for version Q2.21. 2012. USA: Quantis press, 2012.]Search in Google Scholar
[41. Jolliet, O., Margni, M., Charles, R., Humbert, S., Payet, J., Rebitzer, G., Rosenbaum, R. IMPACT 2002+: A New Life Cycle Impact Assessment Methodology. USA: Ecomed publishers, 2003.]Search in Google Scholar
[42. Bruhn, A., Dahl, J., Nielsen, H.B., et. al. Bioenergy potential of Ulva lactuca: Biomass yield methane production and combustion. Bioresource Technology, 2011, No.102, pp. 2595-2604. http://dx.doi.org/10.1016/j.biortech.2010.10.01010.1016/j.biortech.2010.10.01021044839]Search in Google Scholar
[43. Van Iersel, S., Gamba, L., Rossi, A., Alberci, S., Dehue, B., Van de Staaij, J., Flammini, A. Algae-based biofuels: A review of challenges and opportunities for developing countries. Italy: Food and agriculture Organization of the Unites Nations, 2009.]Search in Google Scholar
[44. Kumar, P. Analysis of CO2 capture using algae. USA: Oilgae, 2010. 24 p.]Search in Google Scholar
[45. Bruhn, A., Dahl, J., Nielsen, H. B., et. al. Bioenergy potential of Ulva lactuca: Biomass yield methane production and combustion. Bioresource Technology, 2011, No. 102, pp. 2595-2604. http://dx.doi.org/10.1016/j.biortech.2010.10.01010.1016/j.biortech.2010.10.010]Search in Google Scholar
[46. Surendra, K. C., Takara, D., Hashimote, A. G., et. al. Biogas as a sustainable energy source for developing countries: Opportunities and challenges. Renewable and Sustainable Energy Reviews, 2012, No. 31, pp. 846-859.10.1016/j.rser.2013.12.015]Search in Google Scholar
[47. Collet, P., Helias, A., Lardon, L., et. al. Life-cycle assessment of microalgae culture coupled to biogas production. Bioresource Technology, 2011, No. 102, pp. 207-214. http://dx.doi.org/10.1016/j.biortech.2010.06.15410.1016/j.biortech.2010.06.15420674343]Search in Google Scholar
[48. Frost, P., Gilkinson, S. 27 months performance summary for anaerobic digestion of dairy cow slurry at AFBI Hillsborough. Interim Technical report. USA: Agri-Food and Biosciences Institue, 2011. p. 13.]Search in Google Scholar
[49. Aresta, M., Dibendetto, A., Barberio, G. Utilization of macro-algae for enhanced CO2 fixation and biofuels production: Development of a computing software for an LCA study. Fuel Processing Technology, 2005, No. 86, pp. 1679-1693. http://dx.doi.org/10.1016/j.fuproc.2005.01.01610.1016/j.fuproc.2005.01.016]Search in Google Scholar
[50. Tredici, M. R. Energy balance of microalgae cultures in photobioreactors and ponds. The energy balance and the NER, calculated on real number as at the base of a sound LCA of algal biofules. Italy: EU workshop, Life Cycle Analysis of Algal Based Biofuels, 2012. p. 38.]Search in Google Scholar
[51. Biogas composition from different sources [Online] [Accessed: 13 March 2014]. Available: http://www.biogas-renewable-energy.info/ biogas_ composition.html]Search in Google Scholar
[52. Selehion, A. R., Minael, S., Razavi, S. J. Design and performance evaluation of screw press separator for separating dairy cattle manure. International Journal of Agronomy and Plant Production, 2013, No. 4, pp. 3849-3858.]Search in Google Scholar
[53. Cuellar, A. D., Webber, M. E. Cow power: the energy and emissions benefits of converting manure to biogas. Environmnetal Research Letters, 2008, No. 3(3), p. 8.10.1088/1748-9326/3/3/034002]Search in Google Scholar
[54. Koenig, R. T., Hammac, W. A., Pan, W. L. Canola growth, development and fertility. Fact sheet. USA: Washington state university, 2011, p. 6.]Search in Google Scholar
[55. Balodis, I., Balodis, O. Winter Oilseed Rape Growing - Experience in Farm „Azaidi. Lauksaimniecības zinātne veiksmīgai saimniekošanai, 2013, No. 21, p. 4.]Search in Google Scholar
[56. Biogāzes izmantošanas alternatīvu sistēmu efektivitātes un izmaksu salīdzināšanas sociāli-ekonomisko ieguvmu novērtējums. Izpildes tehniskais ziņojums (Biogas use alternative system efficiency and cost comparison for socio-economic gain evaluation. Technical implementation report). Latvia: Enerģija un vide, 2012, p. 20.]Search in Google Scholar
[57. Dubrovskis, V., Niklass, M., Emsis, I., Kārkliņš, A. Biogāzes ražošana un efektīva izmantošana (Biogas production and efficienct use). Latvia: Latvijas Biogāzes Asociācija, 2013. p. 88.]Search in Google Scholar
[58. Frank, E. D., Han, J., Palau-Rivera, I., et. al. Methane and nitrous oxide emissions affect the life-cycle analysis of algal biofuels. Environmental Research letters, 2012, No. 7, p. 10.10.1088/1748-9326/7/1/014030]Search in Google Scholar
[59. Auziņš, J., Januševskis, A. Eksperimentu plānošana un analīze (Experimental planning and analysis). Latvia: Riga Technical University press, 2007. p. 256.]Search in Google Scholar
[60. Keskinkan, O., Goksu, M. Z. L., Basibuyuk, M., et. al. Heavy metal adsorbtion properties of a submerged aquatic plant (Ceratophyllumdemersum). Bioresource Technology, 2004, No. 92 (2), pp. 197-200.10.1016/j.biortech.2003.07.01114693453]Search in Google Scholar
[61. Aravind, P., Prasad, M. N. V. Zinc protects chloroplasts and associated photochemical functions in cadmium exposed Cerathophyllumdemersum L., a freshwater macrophyte. Plant Science, 2004, No. 166 (5), pp. 1321-1327.10.1016/j.plantsci.2004.01.011]Search in Google Scholar
[62. Rajiv, K. S. Air, water and soil pollution science and technology: green plants and pollution. USA: Nova science publisher, 2010. ]Search in Google Scholar
[63. Block, T. A. Rhoads, A. F., Anisko, A. Aquatic Plants of Pennsylvania: A Complete Reference Guide Book. USA: University of Pennsylvania Press, 2011. http://dx.doi.org/10.9783/978081220504610.9783/9780812205046]Search in Google Scholar
[64. Ha, M. H., Pflugmacher, S. Time-dependentalterations in growth, photosynthetic pigments and enzymatic defense systems of submerged Ceratphyllumdemersum during exposure to the cyanobacterial neurotoxin anatoxin-a. Aquatic toxicology, 2013, No.138, p. 26-34. http://dx.doi.org/10.1016/j.aquatox.2013.04.00710.1016/j.aquatox.2013.04.00723685387]Search in Google Scholar
[65. METHOD 1684: Total, Fixed, and Volatile Solids in Water, Solids, and Biosolids. Environmental Protection Agency, Office of Water, Office of Science and Technology, Engineering and Analysis Division. USA: US EPA.2001. ]Search in Google Scholar