Cabaces, Donnalyn C., Rose Ann G. Andal, Maxell Win C. Eguillon, and John Erick C. Pagcaliwagan. “Development of Biogas Scrubber Using Water Purification System”. PUP Journal of Science & Technology 10, no. 1 (May 31, 2018): 1–10. Accessed January 27, 2026. https://publishing.pup.edu.ph/ojs/index.php/PUP-JST/article/view/400.