%0 Journal Article %T Upgrading of Tafresh municipal wastewater treatment plant (TMWTP) using the Modified Ludzack-Ettinger (MLE) process %J Journal of Advances in Environmental Health Research %I Kurdistan University of Medical Sciences %Z 2676-3478 %A Turkan, Mohammad Reza %A Saeidijam, Saeid %A Reyahi Khoram, Mahdi %D 2019 %\ 10/01/2019 %V 7 %N 4 %P 241-248 %! Upgrading of Tafresh municipal wastewater treatment plant (TMWTP) using the Modified Ludzack-Ettinger (MLE) process %K Activated sludge %K Tafresh city %K Treatment Plant %K Wastewater %R 10.22102/jaehr.2019.185631.1134 %X The present study aimed to evaluate the treatment efficiency of the modified Ludzack-Ettinger (MLE) process using the conventional activated sludge (CAS) in Tafresh city, located in Iran during October-December 2016 (before upgrading) and October-December 2017 (after upgrading to the MLE process). The measured parameters in the study included chemical oxygen demand (COD), five-day biochemical oxygen demand (BOD5), nitrate-nitrogen, total suspended solids, phosphate, dissolved oxygen, ammonium-nitrogen, and pH. According to the obtained results, the treatment efficiency of the MLE process based on the BOD5 and COD was 92.11% and 91.20%, respectively. On the other hand, the treatment efficiency of the CAS process (before upgrading) based on the BOD5 and COD removal was 48.55% and 56.76%, respectively. Therefore, it could be concluded that the MLE process was able to successfully upgrade wastewater treatment services. %U https://jaehr.muk.ac.ir/article_99208_b7e3aceeb6b22b53537b6bc86b0a6ef6.pdf