Joint solid manure cooperation, transforming a problematic product into a useful resource by digestion

Purpose and goal

The project has, through an inventory analysis (study visit/exhibition/conference), identified various techniques for the disintegration of solid manure as well as function for the following unit operations in the biogas plant. The project has also clarified the importance of source separation in stables and developed a draft for a method for environmental assessment of digestion of solid manure. Based on the results of the activities, the partners have discussed a structure for the continued work in the area, potential activities and an expansion of partners for an UDI 2 Project.

Expected results and effects

Collected information strengthens our assessment that solid manure can become an important biogas substrate in the future that can be co-digested with other substrates from agriculture and waste. Solid fertilizer can also contribute about 1 TWh of biogas/year and, in the longer term, it will contribute to the Agenda 2030. The project has resulted in identifying techniques for pre-treatment of solid manure which not are available on the Swedish market today. Further, the project group has together got a better understanding of the whole system "biogas and digestate from solid manure".

Planned approach and implementation

The structure of the inventory analysis has been appreciated by partners who operate biogas plants, and this has concretized the challenge "biogas and digestate from solid manure". The information has contributed with important pieces on requirement specification regarding the design and test of critical unit operations prior to an UDI 2 application. The inventory analysis, as well as the work on hypothetical plants, has also contributed to discussions about how activities in stables (upstream) as well as digestate handling (downstream) can be designed for an UDI 2 application.