Wastewater treatment from washing machines by the method of electrocoagulation for the reuse in irrigation of vegetables - Ate Vitarte

La electrocoagulación (EC) en los últimos años está llamando la atención para la eliminación de diferentes contaminantes presentes en diversos efluentes. A través de este trabajo, se verificó la viabilidad de utilizar la técnica de electrocoagulación como una alternativa ante los procesos químicos convencionales, en el tratamiento del agua residual de lavadoras para ser reutilizado en riego de vegetales. Analizadas regularmente. Se analizaron cuatro factores: intensidad, tiempo, distancia y pH; con tres niveles para cada factor. Para optimizar el proceso de electrocoagulación sobre los factores de diseño, se realizaron experimentos de acuerdo al método de Taguchi. Se realizó el análisis de varianza (ANOVA) para ver el efecto de los variables sobre la remoción de la turbiedad y otros parámetros fisicoquímicos. Los resultados arrojaron que los parámetros de mayor influencia en la remoción de la turbiedad fueron tiempo e intensidad a comparación de los demás. La optimización de los factores sobre la alta remoción de los parámetros fisicoquímicos se obtuvo a los niveles de intensidad 5 Amperios, 15 minutos, 2 centímetros y pH 7.5, con una remoción de 99.02% turbiedad, 90.83% DQO y 95.93% SST, el efluente tratado se encuentra en el rango permisible para su uso en riego de vegetales.Electrocoagulation (EC) in recent years is calling the growing attention for the elimination of different contaminants present in the various effluents. Through this work, the feasibility of using the electrocoagulation technique as an alternative to conventional chemical processes in the treatment of wastewater from washing machines to be reused in vegetable irrigation, analyzed regularly was verified. Four factors were analyzed: intensity, time, distance and pH; with three levels for each factor. To optimize the electrocoagulation process on the design factors, the experiments were carried out according to the Taguchi method. The analysis of variance (ANOVA) was performed to see the effect of the variables on the removal of turbidity and other physicochemical parameters. The results showed that the parameters with the greatest influence on the removal of turbidity were time and intensity compared to the others. The optimization of the factors on the high removal of the physicochemical parameters was obtained at the levels of intensity 5 Amps, time of 15 minutes, distance of 2 centimeters and pH 7.5, with a removal of 99.02% in turbidity, 90.83% in COD Y 95.93% in SST, with which the treated effluent is in the permissible range for use in vegetable irrigation

Effects of the Operational Parameters in a Coupled Process of Electrocoagulation and Advanced Oxidation in the Removal of Turbidity in Wastewater from a Curtember

The tannery industry during its process generates various polluting substances such as organic matter from the skin and chemical inputs, producing wastewater with a high concentration of turbidity. The objective of this research is to evaluate the most appropriate operational parameters of the coupled process of electrocoagulation and advanced oxidation to achieve the removal of turbidity in wastewater from a tannery in the riparian zone (tannery). This process uses a direct current source between perforated aluminum electrodes of circular geometry submerged in the effluent, which causes the dissolution of the aluminum plates. For our study, an electrocoagulation unit coupled to an ozone generator has been built at the laboratory level, where the influence of five factors (voltage, inlet flow to the reactor, initial turbidity, pH, and ozone flow) has been studied with three levels with regarding turbidity, using the Taguchi experimental methodology. The optimal conditions for the removal of turbidity were obtained at 10 volts, 7.5 pH, 360 L/h of wastewater recirculation flow rate; 2400 mg/h of ozone flow rate; and 1130 NTU of initial turbidity of the sample in 60 min of treatment reaching a removal of 99.75% of the turbidity. Under optimal conditions, the removal of chemical oxygen demand (COD) and biochemical oxygen demand (BOD) was determined, reaching a removal percentage of 33.2% of COD and 39.36% of BOD was achieved. Likewise, the degree of biodegradability of the organic load obtained increased from 0.467 to 0.553

Effects of the Operational Parameters in a Coupled Process of Electrocoagulation and Advanced Oxidation in the Removal of Turbidity in Wastewater from a Curtember

The tannery industry during its process generates various polluting substances such as organic matter from the skin and chemical inputs, producing wastewater with a high concentration of turbidity. The objective of this research is to evaluate the most appropriate operational parameters of the coupled process of electrocoagulation and advanced oxidation to achieve the removal of turbidity in wastewater from a tannery in the riparian zone (tannery). This process uses a direct current source between perforated aluminum electrodes of circular geometry submerged in the effluent, which causes the dissolution of the aluminum plates. For our study, an electrocoagulation unit coupled to an ozone generator has been built at the laboratory level, where the influence of five factors (voltage, inlet flow to the reactor, initial turbidity, pH, and ozone flow) has been studied with three levels with regarding turbidity, using the Taguchi experimental methodology. The optimal conditions for the removal of turbidity were obtained at 10 volts, 7.5 pH, 360 L/h of wastewater recirculation flow rate; 2400 mg/h of ozone flow rate; and 1130 NTU of initial turbidity of the sample in 60 min of treatment reaching a removal of 99.75% of the turbidity. Under optimal conditions, the removal of chemical oxygen demand (COD) and biochemical oxygen demand (BOD) was determined, reaching a removal percentage of 33.2% of COD and 39.36% of BOD was achieved. Likewise, the degree of biodegradability of the organic load obtained increased from 0.467 to 0.553

Turbidity Removal from a Model Solution by Continuous Mode Electrocoagulation and Evaluation of Energy Consumption

The purpose of the research has been the construction of a new electrocoagulation (EC) equipment and its technical evaluation in the treatment of a model solution with a high level of turbidity. The EC system contains six cells installed in series, coupled to a flocculator and a clarifier (sludge decanter), each cell unit is composed of a cylindrical aluminum (Al) anode and a solid stainless-steel rod as cathode in connection with a DC power supply, the aluminum anodes are replaced by iron (Fe) according to the proposed tests. The influence of two factors, such as the applied electric potential and the type of electrode used, on turbidity removal performance, total dissolved solids (TDS) and electrical energy consumption were examined. The tests were carried out using a two-factor factorial design, electrical potential at (0, 3, 6 and 9 V) and type of anode (aluminum and iron). The investigation of the operating parameters was carried out in continuous mode. The initial turbidity of the water to be treated was set at 84.5 NTU, a value generally found in surface water. The results showed that the best conditions for turbidity removal were at an electrical potential of nine volts reaching a removal of 82.29 % and an energy consumption for aluminum electrodes of 0.7142 kWh/m3. It is also observed that the value of total dissolved solids after treatment is still slightly high. In conclusion, electrocoagulation with Al/steel electrodes proved to be an appropriate technology for water treatment due to its turbidity removal efficiency and low electrical energy consumption. &nbsp