Operational factors affecting the bioregeneration of mono-amine modified silica loaded with Acid Orange 7.
In this study, the operational factors affecting the bioregeneration of AO7-loaded MAMS particles in batch system, namely redox condition, initial acclimated biomass concentration, shaking speed and type of acclimated biomass were investigated. The results revealed that with the use of mixed culture acclimated to AO7 under anoxic/aerobic conditions, enhancement of the bioregeneration efficiency of AO7-loaded MAMS and the total removal efficiency of COD could be achieved when the bio-decolorization and bio-mineralization stages were fully aerated with dissolved oxygen above 7 mg/L. Shorter duration of bioregeneration was achieved by using relatively higher initial biomass concentration and lower shaking speed, respectively, whereas variations of biomass concentration and shaking speed did not have a pronounced effect on the bioregeneration efficiency. The duration and efficiency of bioregeneration process were greatly affected by the chemical structures of mono-azo dyes to which the biomasses were acclimated.
School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia. al_amrani2003@yahoo.com
Waheeba Ahmed
WA
Al-Amrani
Poh-Eng
PE
Lim
Chye-Eng
CE
Seng
Wan Saime Wan
WS
Ngah
D000327:Adsorption; D000588:Amines / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry* / Q000378:metabolism*; D001557:Benzenesulfonates / Q000737:chemistry* / Q000378:metabolism*; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D004396:Coloring Agents / Q000737:chemistry / Q000378:metabolism; D007220:Industrial Waste; D010084:Oxidation-Reduction; D010100:Oxygen; D012822:Silicon Dioxide; D014865:Waste Disposal, Fluid / Q000379:methods*
D000588:Amines; D001391:Azo Compounds; D001557:Benzenesulfonates; D004396:Coloring Agents; D007220:Industrial Waste; D012822:Silicon Dioxide; C014722:2-naphthol orange; D010100:Oxygen