Abstract:The research concerned the elaborate of non-waste biogas production technology based on the development of digestate from anaerobic digestion. In the anaerobic digestion process, the substrates of plant origin in the form of silage were used. The digestate obtained after biogas production was processed using the ORTWED method into a valuable granulated organic-mineral fertilizer, which contains a solid fraction of digestate, calcium and biogenic elements. This method can be successfully applied in agriculture in the context of its sustainable development due to the growing problem of utilization of digestate forming in agricultural biogas plants.

The article concerns the idea of knowledge and its innovative potential in the knowledge-based economy. The processes related to the knowledge transfer and knowledge management are often considered as factors determining the success in innovativeness. Knowledge management is also an important issue in inter-organizational cooperation since it considerably helps in the development of new technological solutions. The article provides research results on knowledge management conducted among enterprises and scientific units involved in cooperation under R&D projects co-financed by the Polish Federation of Engineering Associations and the National Centre for Research and Development.

This paper is mainly based on a case study of Tuzal Ltd. -a small firm acting in the eco-innovation market in Poland. The main aim of the paper is to analyze main barriers which are being met by enterprises, especially small firms, acting in the eco-innovation market. The following barriers are analysed: problems in convincing customers to innovative solutions; a specific nature of cooperation with local administration units; continuous changes in legal regulations; an increasing market competition; a lack of funds for marketing; a generation gap and a retirement age of the company's owner.

Purpose – The purpose of the article is to analyse the importance of linkages and trust in business‑science cooperation. Moreover, the aim is to verify the impact of close business‑science relations on the innovativeness of the national economy. Research method – Literature studies, surveys, FGI (Focus Group Interview) Results – The research confirms the high importance of relations and relationship management in the development of business‑science cooperation. Companies that assess cooperation with science as valuable and significant to innovation, also indicate a high level of mutual relations and related fluidity in the exchange of knowledge. On the other hand, weak relations and low levels of trust often lead to problems in the implementation of joint projects, and, as a result, in the development of innovation. Originality / value / implications / recommendations – The processes of relationship development and trust‑building are as important in business‑science cooperation as the carefully conducted technology transfer. Thus, companies and scientific units engaged in mutual cooperation should pay attention to both of these factors. In macroeconomic terms, the level of relations between representatives of business and science affects the number of innovations created by a given economy. As a result, it also determines its innovativeness.

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