Pig slurry valorization by ammonia recovery, biogas upgrading and microbial protein production - Nicolas, Amanda Prado de; Serra-Toro, Andreu; Ventura, Maria; Astals, Sergi; Dosta, Joan; Mas, Francesc; Segura, Yolanda; Melero, Juan A; Martinez, Fernando; Puyol, Daniel (Bioresource Technology, 2025)