Sudsuansee thaithat, Sergsiri S, Khanthirat W. The Two-Stage Anaerobic Digestion System Using Solar Heat Energy. JEIT [internet]. 2023 Apr. 29 [cited 2026 Oct. 7];1(1):10-22. available from: https://ph03.tci-thaijo.org/index.php/JEIT/article/view/568