Effects of Ultraviolet-Enhanced Ozonation on Degradation of Ammonia and Urea in Fertilizer Plant Wastewater

International Conference on Science and Innovated Engineering

工业技术（总论）;自然科学（总论）

Muhammad Yusuf, A.R.^1 ; Mulana, Farid^2 ; Said, Syahiddin Dahlan^2

Post-Graduate Study Program, Chemical Engineering Department, Syiah Kuala University, Darussalam-Banda Aceh

23111, Indonesia^1

Chemical Engineering Department, Syiah Kuala University, Darussalam-Banda Aceh

23111, Indonesia^2

关键词: Combination systems;    Degradation process;    Fertilizer plant;    Hydroxyl radicals;    Initial feed concentration;    Organic contaminant;    Ozonation process;    Potential methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/536/1/012034/pdf
DOI  :  10.1088/1757-899X/536/1/012034

来源: IOP

【 摘 要 】

Ammonia and urea contained in fertilizer plant wastewater are pollutants to the environment. High concentration of ammonium and urea in wastewater can affects algae blooms in ecosystem which will generate various diseases in aquatic biota. It is known that there are many methods for degradation of ammonium and urea contained in fertilizer plant wastewater. One of potential method is ultraviolet-enhanced ozonation. Ozonation is oxidation with O3 that generates hydroxyl radicals which subsequently react with organic contaminants, while UV irradiation can break down O3 molecules and produce radical ions OH. The objectives of this study were to examine the effects of the utilization of the ultraviolet-enhanced ozonation method in degradation of various initial ammonium (100-300 ppm) and urea concentration (100-300 ppm) in inlet feed of ozonation-UV irradiation combination system. Some important variables such as contact time (0-120 minutes) and ozone feed rate of 0.2, 0.6, and 1.21 g/h were evaluated. Degradation process was carried out in two steps; ozonation and UV irradiation. Ozonation process was carried out in a contacting tank at constant feed flow rate of 1.5 l/min and at room temperature, while UV irradiation process was conducted in pipeline equipped with UV lamp at various contact time. The ultraviolet-enhanced ozonation could degraded ammonium and urea nitrogen up to 83.6% and 63.8%, respectively, at ozone feed rate 1,21 g/h, contacting time 60 and 120 min, initial feed concentration of ammonia (100 ppm) and urea (40 ppm).