Aerobic Sequencing Batch Reactor System With Granular Activated Carbon for the Treatment of Wastewater Containing a Reactive Dye

Abstract

In this study, the effect of adding granular activated carbon (GAC) to aerobic sequencing batch reactor (SBR) on possibility to treat a wastewater containing a reactive dye (Brill Blue KN-R) was investigated. Experiments were performed in four cylindrical Plexiglas reactors for 68 days (5 days for acclimatization of sludge and 63 days for normal operation in two separate phases). Initial dye concentrations were adjusted to 20, 25, 30 and 40 mg/L in the reactors R1, R2, R3 and R4, respectively . Constant concentration of GAC (1000 mg/L) was added to SBRs after 36 days of normal operation. According to the obtained data, dye removal efficiencies were increased significantly by adding GAC to SBRs. The average dye removal efficiencies of R1, R2, R3 and R4 were increased 23, 23.6, 18.7 and 18 percent, respectively, after adding GAC to SBR reactors. Additionally, no significant changes on average COD removal efficiencies were observed. Average SVI of all reactors was slightly decreased by adding GAC. The average SVI of all reactors, before and after adding GAC, was in the range of 37-49 mL/g and 27-43 mL/g, respectively.

Advanced catalytic oxidation process based on a Ti-permanganate (Mn/Ti-H+) reaction for the treatment of dye wastewater

“…The usual management procedures involved in textile wastewaters are elimination by activated carbon adsorption, coagulation/ occulation, and membrane separation (ultraltration, reverse osmosis), but these processes are not the comprehensive solution of the removal of pollutants, while a biological treatment is not an exact solution due to the biological resistance of some dyes. [14][15][16][17][18] Thus, the dye wastewater management requires ultraadvanced processes for the recovery of colored water with the elimination of all relative byproducts by using the developed method. Therefore, for this purpose, the oxidizing agent KMnO 4 was used due to its preventive nature instead of any other compound of a high oxidative potential for the preservation of water bodies.…”

A Critical Analysis on the Efficiency of Activated Carbons from Low-Cost Precursors for Heavy Metals Remediation

“…This is evident from the vast literature survey which also reveals that ACs have been used successfully for the removal of metal ions, besides other pollutants such as phenols, detergents, pesticides, chlorinated hydrocarbons. [47][48][49][50][51][52][53] The high adsorption capacity and faster kinetics as demonstrated by ACs for heavy metal ion removal from liquid phases is primarily due to their high micropore volume, large specific surface area, and favorable pore size distribution. 8 Despite the major success of AC as commercial adsorbent in waste water treatment, its use is restricted due to the high cost of its precursors such as coal, coconut shells, wood, peat, and petroleum-based residues.…”

Mathematical Correlations of the Variable Parameters Specific for an SBR Experimental Laboratory Plant

“…For an SBR plant, the biological tank is the main element of the system. The treatment process is divided into five phases: filling, reaction, settling, discharge of treated water and sludge [10][11][12][13][14][15][16][17][18][19][20][21][22].…”

“…In the cases of lower variable inflows, the mechanical-biological treatment process is directly by several factors (wastewater temperatures, chemical composition). Also, it is known that, SBR process efficiency depend by operation time cycle and who the working parameters can counterbalance the problems introduced in the system by qualitative and quantitative inflow variation [10][11][12][13][14][15][16][17][18][19][20][21][22].…”

“…In some researches SBR modeling process were performed by taken into consideration some important parameters and how these interact [10][11][12][13][14][15][16][17][18][19][20][21][22].…”