Treatment of wet coffee processing wastewater using a pulsed-electrocoagulation process: optimization using response surface technique
Abstract In this study, the removal efficiency of chemical oxygen demand (COD), color, turbidity, phosphate, and nitrate from wet coffee processing wastewater by pulsed-electrocoagulation process (PECP) was examined with various factors such as pH: 3–11, reaction time: 15–75 min, current: 0.150–0.75...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-02-01
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| Series: | Applied Water Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s13201-024-02118-1 |
| _version_ | 1797266633141518336 |
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| author | Kassahun Tadesse Asefaw Perumal Asaithambi Maleku Tegegn |
| author_facet | Kassahun Tadesse Asefaw Perumal Asaithambi Maleku Tegegn |
| author_sort | Kassahun Tadesse Asefaw |
| collection | DOAJ |
| description | Abstract In this study, the removal efficiency of chemical oxygen demand (COD), color, turbidity, phosphate, and nitrate from wet coffee processing wastewater by pulsed-electrocoagulation process (PECP) was examined with various factors such as pH: 3–11, reaction time: 15–75 min, current: 0.150–0.750 Amp, and electrolyte concentration: 0.25–1.25 g/L. Several operational parameters for the treatment of wet coffee processing wastewater utilizing the PECP have been optimized through the application of the surface response design technique, which is based on the central composite design. A quadratic model helped estimate the percentage removal of COD, color, turbidity, phosphate, and nitrate with power consumption under various situations. It also evaluated the significance and their interaction with independent variables using analysis of variance (ANOVA). Through the use of statistical and mathematical techniques, optimum conditions were determined in order to remove the maximum pollutant and nutrient while using the minimum of power. The results showed that the removal of COD—98.50%, color—99.50%, turbidity—99.00%, phosphate—99%, and nitrate—98.83%, with a power consumption of 0.971 kWh m−3 were achieved at pH-7, NaCl dose of 0.75 g/L, electrolysis duration of 45 min, and current of 0.45 Amp. Therefore, under the different operating conditions, the PECP demonstrated to be a successful technique for pollutant removal from wastewater and industrial effluent. |
| first_indexed | 2024-03-07T14:47:35Z |
| format | Article |
| id | doaj.art-609bf667d7dc46709b27e389dcb9159e |
| institution | Directory Open Access Journal |
| issn | 2190-5487 2190-5495 |
| language | English |
| last_indexed | 2024-04-25T01:03:47Z |
| publishDate | 2024-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Water Science |
| spelling | doaj.art-609bf667d7dc46709b27e389dcb9159e2024-03-10T12:19:11ZengSpringerOpenApplied Water Science2190-54872190-54952024-02-0114311710.1007/s13201-024-02118-1Treatment of wet coffee processing wastewater using a pulsed-electrocoagulation process: optimization using response surface techniqueKassahun Tadesse Asefaw0Perumal Asaithambi1Maleku Tegegn2Department of Water Supply and Environmental Engineering, Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma UniversityDepartment of Water Supply and Environmental Engineering, Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma UniversityDepartment of Water Supply and Environmental Engineering, Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma UniversityAbstract In this study, the removal efficiency of chemical oxygen demand (COD), color, turbidity, phosphate, and nitrate from wet coffee processing wastewater by pulsed-electrocoagulation process (PECP) was examined with various factors such as pH: 3–11, reaction time: 15–75 min, current: 0.150–0.750 Amp, and electrolyte concentration: 0.25–1.25 g/L. Several operational parameters for the treatment of wet coffee processing wastewater utilizing the PECP have been optimized through the application of the surface response design technique, which is based on the central composite design. A quadratic model helped estimate the percentage removal of COD, color, turbidity, phosphate, and nitrate with power consumption under various situations. It also evaluated the significance and their interaction with independent variables using analysis of variance (ANOVA). Through the use of statistical and mathematical techniques, optimum conditions were determined in order to remove the maximum pollutant and nutrient while using the minimum of power. The results showed that the removal of COD—98.50%, color—99.50%, turbidity—99.00%, phosphate—99%, and nitrate—98.83%, with a power consumption of 0.971 kWh m−3 were achieved at pH-7, NaCl dose of 0.75 g/L, electrolysis duration of 45 min, and current of 0.45 Amp. Therefore, under the different operating conditions, the PECP demonstrated to be a successful technique for pollutant removal from wastewater and industrial effluent.https://doi.org/10.1007/s13201-024-02118-1Coffee processing wastewaterPulsed-electrocoagulationRemoval of pollutant and nutrientPower consumptionOptimizationResponse surface methodology |
| spellingShingle | Kassahun Tadesse Asefaw Perumal Asaithambi Maleku Tegegn Treatment of wet coffee processing wastewater using a pulsed-electrocoagulation process: optimization using response surface technique Applied Water Science Coffee processing wastewater Pulsed-electrocoagulation Removal of pollutant and nutrient Power consumption Optimization Response surface methodology |
| title | Treatment of wet coffee processing wastewater using a pulsed-electrocoagulation process: optimization using response surface technique |
| title_full | Treatment of wet coffee processing wastewater using a pulsed-electrocoagulation process: optimization using response surface technique |
| title_fullStr | Treatment of wet coffee processing wastewater using a pulsed-electrocoagulation process: optimization using response surface technique |
| title_full_unstemmed | Treatment of wet coffee processing wastewater using a pulsed-electrocoagulation process: optimization using response surface technique |
| title_short | Treatment of wet coffee processing wastewater using a pulsed-electrocoagulation process: optimization using response surface technique |
| title_sort | treatment of wet coffee processing wastewater using a pulsed electrocoagulation process optimization using response surface technique |
| topic | Coffee processing wastewater Pulsed-electrocoagulation Removal of pollutant and nutrient Power consumption Optimization Response surface methodology |
| url | https://doi.org/10.1007/s13201-024-02118-1 |
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