_____________________________________________________________________________________________________ *Corresponding author: E-mail: anna@au-plovdiv.bg; Journal of Agriculture and Ecology Research International 8(1): 1-7, 2016; Article no.JAERI.25217 ISSN: 2394-1073 SCIENCEDOMAIN international www.sciencedomain.org Biobased Fertilizers - Comparison of Nutrient Content of Digestate/Compost A. Aladjadjiyan 1* , D. Penkov 1 , Ann Verspecht 2 , A. Zahariev 3 and N. Kakanakov 3 1 Agricultural University, “Mendeleev” 12, 4000 Plovdiv, Bulgaria. 2 Gent University, Gent, Belgium. 3 National Biomass Association, “Antim I”, 22, 4000 Plovdiv, Bulgaria. Authors’ contributions This work was carried out in collaboration between all authors. Author AZ managed the data about Shishmantsi, collected information about collection, technology and development of compost in the factory. Author DP collected information about waste distribution, collection, storage in Han Bogrov. Author AV managed the analyses of the study. Author AA managed and wrote the last draft of the manuscript. All authors read and approved the final manuscript. Article Information DOI: 10.9734/JAERI/2016/25217 Editor(s): (1) Claudius Marondedze, Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Kingdom of Saudi Arabia. Reviewers: (1) Ade Onanuga, Dalhousie University, Halifax, Canada. (2) Monica Guadalupe Lozano Contreras, National Institute of Forest Research Agricultural and Livestock (INIFAP), Mexico. (3) Tunira Bhadauria, Kanpur University, Uttar Pradesh, India. (4) Raimundo Jimenez Ballesta, Universidad Autonoma Madrid, Spain. Complete Peer review History: http://sciencedomain.org/review-history/14266 Received 23 rd February 2016 Accepted 12 th April 2016 Published 20 th April 2016 ABSTRACT Agriculture is the main source of soil degradation processes in Bulgaria. Therefore, soil improvement is an important task. The possibilities for using composted either municipal waste or residues from biogas production for soil improvement in Bulgaria, suggested by the development of INEMAD (Improvement of Nutrient and Energy Management through Anaerobic Digestion) project, should be assessed and popularized. The advantages and disadvantages should be analysed and discussed. This paper uses the results of two previously published papers by AUP within the framework of INEMAD where the possibilities for production and sale of compost from municipal waste and digestate from biogas by anaerobic digestion of animal manure are discussed. Original Research Article