This work is a case study of an agro-industrial company from Arad County, Romania. This company applies an integrated farming and processing approached by (near) closed loop cycle of bio-resources: (1) agricultural farming, (2) animal breeding (cattle and pigs), (3) food production (meat and milk products), (4) marketing finished agro (bio) products. The single link missing to close this cycle is conversion of organic wastes into energy and fertilizer. We propose application of anaerobic digestion of organic wastes generated in agricultural and industrial processes of this company to produce energy and organic fertilizer which will be applied on the agricultural fields to produce new feedstock for the agro-industrial complex. The methodology applied highlights the influence of the added co-substrates on the digestion process, and the possibilities of the energy recovery in suitable units, to mitigate the highest value of energy efficiency. In comparison to alternative technologies for energy production, the proposed CHP energy recovery is consuming less primary energy for the same amount of energy as underline the PES indicators of 20.30 % for scenario 1, and 11.05 % for scenario 2.

Proceedings of the 25th European Biomass Conference and Exhibition, 12-15 June 2017, Stockholm, Sweden, pp. 938-942