Identifying targets for increased biogas production through chemical and organic matter characterization of digestate from full-scale biogas plants: what remains and why? - Ekstrand, Eva-Maria; Björn, Annika; Karlsson, Anna; Schnürer, Anna; Kanders, Linda; Yekta, Sepehr Shakeri; Karlsson, Martin; Moestedt, Jan (Biotechnology for Biofuels & Bioproducts, 2022)