If you are fluent in Swedish, you can check out our Hungry for Saltvik videos on agro-ecological symbiosis (AES) collaborations. AES is a form of food production and processing in which the farms, the food processors, and the energy producers function in an integrated manner. The operations are running in spatial proximity to each other allowing efficient material and energy integration. You can read more about AES on Helsinki University website.
Below is a video where Christer Söderström from Orkla talks about the plant's biogas investment – you can find the whole series in YouTube.