Aquaculture Wastewater Treatment Using A Combination Of Ozonation Process And Activated Carbon Adsorption
Loading...
Date
2021-06-01
Authors
Mohd Shukri, Farah Anis
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
This study investigates the effectiveness of ozonation treatment alone and
combination of ozonation treatment with activated carbon adsorption to treat the
synthetic aquaculture wastewater. The solution of a synthetic dye, methylene blue was
ozonated using an ozone generator in order to illustrate the color removal of
aquaculture wastewater. The experiment was conducted under a constant ozone dosage
of 600 mg/h and the concentration was observed throughout 60 minutes. The factors
affecting the process of degradation were investigated, i.e., the effects of initial dye
concentration (mg/L) and effects of pH. Apart from that comparison between
ozonation and ozonation-activated carbon adsorption was observed. The ozonation
was done in 1L beaker with 500 mL dye solution. The initial concentration studied in
this work were 30 mg/L, 45 mg/L and 60 mg/L meanwhile pH 3, pH 7 and pH 9 for
pH studies. As a result, the initial dye concentration of 60 mg/L took the longest
reaction time to achieve 90% of color removal efficiency followed by 45 mg/L and 30
mg/L. This happened as ozone became the limiting substances in the reaction since the
ozone dosage supplied was kept constant. Eventually, within 60 minutes, all color were
successfully removed for all the initial concentrations. Apart from that, the degradation
of methylene blue with ozone treatment had the highest color removal at pH 9 which
was under basic condition and the lowest at pH 3 which was under acidic condition.
Ozonation performed best under alkaline condition as more hydroxyl radicals could
be generated compared in acidic condition. Besides that, the rate of degradation was
enhanced with the combination of activated carbon adsorption and ozonation
treatment.