چکیده مقاله
This study investigates the optimization of nitrogen removal in wastewater treatment using algae cultivation, a cost effective and efficient method The objective is to identify the optimal nitrogen concentration and aeration rate, which are critical for enhancing microbial activity and improving nitrogen removal in industrial wastewater treatment plants Membrane bioreactors MBR with a two liter active volume were used to promote cell growth, with a light source of 1x intensity, pH around 5, and a temperature of 30°C A central composite design CCD combined with response surface methodology RSM was applied to evaluate the effects of added nitrogen, aeration rate, and their interaction on nitrogen removal Aeration rates ranged from 0 1 to 1 L min, while initial nitrogen concentrations varied between 1 to 2 mg L ANOVA results showed significant effects of aeration rate, added nitrogen, and their interaction on nitrogen removal efficiency p value < 0 The aeration rate had the greatest impact on nitrogen removal The highest nitrogen removal rate X% was achieved at an aeration rate of 1 L min and a nitrogen concentration of 2 mg L Optimization was performed using Design Expert software, confirming the positive correlation between increased aeration and nitrogen removal However, it was found that excessive nitrogen levels could negatively affect the algae's performance, as ammonia concentrations beyond the algae's tolerance threshold hinder nitrogen removal Therefore, optimizing both nitrogen and aeration levels is crucial for maximizing removal efficiency
کلیدواژهها
نویسندگان
Alireza Ganji
M Sc , Faculty of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Azadeh Babaei
Assistant Professor, Department of Chemistry, Karaj Branch, Islamic Azad University, Iran
Atefeh Alipourzadeh
M Sc , School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
شیوه ارجاع
Ganji, Alireza and Babaei, Azadeh and Alipourzadeh, Atefeh,1404,Effect of nitrogen concentration and aeration rate on the nitrogen removal rate in microalgal membrane bioreactor: Using response surface methodology,The 7th international conference on creative achievements of architecture, urban planning, civil engineering and environment in the sustainable development of the Middle East,Mashhad
ارائهشده در
مجموعه مقالات هفتمین کنفرانس بین المللی دستاوردهای خلاقانه معماری، شهرسازی، عمران و محیط زیست در توسعه پایدار خاورمیانه15 مرداد 1404 · مشهد