Damrongsat, A., Krongthamchat, K., & Dararat, S. (2017). Using Zeolite and Ugraded Sand to Remove Ammonia Nitrogen From Swine Wastewater(Thai). Asia-Pacific Journal of Science and Technology, 11(4), 311–318. retrieved from https://so01.tci-thaijo.org/index.php/APST/article/view/83984