Kaewtapan, Kantima, Natthakongka Sirithorn, and Wanida Chooaksorn. 2024. “Study on the Potential of Co-pelletizing Fuel from Municipal Wastewater Treatment System Sludge, Tea Ground, and Coffee Ground”. Science and Engineering Connect 47 (4). Bangkok, Thailand:348-61. https://ph04.tci-thaijo.org/index.php/SEC/article/view/7768.