Jung, Kyung-Won Hwang, Min-Jin Park, Dae-Seon Ahn, Kyu-Hong 2024-01-20T05:30:56Z 2024-01-20T05:30:56Z 2021-09-03 2015-12-17 1383-5866 https://pubs.kist.re.kr/handle/201004/124616 This study deals with the application of a fluidized three-dimensional electrode reactor (F-TDER) system combining granular activated carbon (GAC) as a moving particle electrode and an electric field for greywater treatment by electrocoagulation. In order to eliminate the adsorption capacity of GAC, pre-exposed GAC (20 cycles) to greywater was employed. Through a series batch test, the four main key parameters as independent variables and each experimental range were determined (applied current, GAC dosage, initial pH, and reaction time). Statistical optimization of the F-TDER system was subsequently carried out by the response surface methodology with a Box-Behnken design to describe interactive effects of determined independent variables on the maximization of COD removal efficiency. From an analysis of variance, it was found that a quadratic polynomial model fitted with the actual data well (R-2 = 0.9709). The response surface analysis showed that GAC dosage, initial pH, and reaction time were more influential factors than applied current, and they had either slightly interdependent or significantly interactive effects on COD removal efficiency. The optimum conditions found were applied current of 354.3 mA, GAC dosage of 47.1 g/L, initial pH of 5.4, and reaction time of 55 min which resulted in 98.56 +/- 0.14% of COD removal efficiency. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV RESPONSE-SURFACE METHODOLOGY GREY WATER-TREATMENT WASTE-WATER BED REACTOR ELECTROCOAGULATION REMOVAL DEGRADATION INDUSTRY DESIGN SLUDGE Performance evaluation and optimization of a fluidized three-dimensional electrode reactor combining pre-exposed granular activated carbon as a moving particle electrode for greywater treatment Article 10.1016/j.seppur.2015.10.030 1 SEPARATION AND PURIFICATION TECHNOLOGY, v.156, pp.414 - 423 SEPARATION AND PURIFICATION TECHNOLOGY 156 414 423 scie scopus 000366537900036 2-s2.0-84959552755 Engineering, Chemical Engineering Article RESPONSE-SURFACE METHODOLOGY GREY WATER-TREATMENT WASTE-WATER BED REACTOR ELECTROCOAGULATION REMOVAL DEGRADATION INDUSTRY DESIGN SLUDGE Greywater Electrocoagulation Granular activated carbon Fluidized three-dimensional electrode reactor Response surface methodology