Anaerobic mesophilic digestion of sludge with extra-thermophilic and high pH pre-treatmentMenert, Anne; Rikmann, Ergo; Michelis, Merje; Vaalu, Tarmo; Blonskaja, Viktoria; Vilu, RaivoProceedings of 4th Conference on the Establishment of Cooperation between Companies and Institutions in the Baltic Sea Region2005 / p. 451-463 https://open.lnu.se/index.php/eco-tech/article/view/2102