ไกรวุฒินันท์ ปริญญา, and คําใจดี พีรพร. “The Efficiency of filter media used in anaerobic filter in wastewater treatment”. KKU Science Journal 45, no. 2 (June 30, 2017): 399–405. accessed December 6, 2025. https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249719.