TY - JOUR ID - 40195 TI - Optimization of ammonia removal in an integrated fix-film activated sludge using response surface methodology JO - Journal of Advances in Environmental Health Research JA - JAEHR LA - en SN - 2676-3478 AU - Hossini, Hoshyar AU - Rezaee, Abbas AU - Barati-Roshvanlo, Reza AD - Department of Environmental Health, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran Y1 - 2015 PY - 2015 VL - 3 IS - 2 SP - 130 EP - 138 KW - Ammonia KW - Wastewater KW - optimization KW - Biofilms DO - 10.22102/jaehr.2015.40195 N2 - In this work, removal of ammonia from synthetic wastewater using integrated fixed-film activated sludge (IFAS) process was optimized using response surface methodology (RSM). The main operating parameters such as ammonia concentration rate (ALR) and hydraulic retention time (HRT) were optimized to acquire the maximum removal efficiency. The linear, 2FI, quadratic, mean, and cubic models were utilized for modeling of the parameters. Residual nitrate and nitrite were determined as the byproducts. The results showed that the actual data fitted well with the predicted results. The maximum ammonia removal achieved using mean, linear, 2FI, quadratic, and cubic models were 59.88, 79.05, 79.32, 77.11, and 78.65%, respectively. Nitrate and nitrite were determined in ammonia concentrations of higher than 100 mg/l. The obtained results showed that RSM is a suitable technique for the optimization of conditions for the maximum removal of ammonia. UR - https://jaehr.muk.ac.ir/article_40195.html L1 - https://jaehr.muk.ac.ir/article_40195_53e1bac746e7f7f29a5f7d26a63615e4.pdf ER -