Ahmad A, Ghufran R, Wahid ZA. Effect of cod loading rate on an upflow anaerobic sludge blanket reactor during anaerobic digestion of palm oil mill effluent with butyrate. JEELM [Internet]. 2012Nov.22 [cited 2024Nov.15];20(4):256-64. Available from: https://transport.vgtu.lt/index.php/JEELM/article/view/4645