Zhao, Yuhe, and Xinqiang Ning. “Research on the Enhancement of an Anammox System Using Iron Derived from Excess Sludge”. International Journal of Natural Resources and Environmental Studies 8, no. 5 (June 1, 2026): 104–113. Accessed June 6, 2026. https://wepub.org/index.php/IJNRES/article/view/6179.