eaguilaa@ulima.edu.pe

eaguilaa@ulima.edu.pe

eaguilaa@ulima.edu,pe

eaguilaa@ulima.edu.pe

En el Perú, el tratamiento convencional del agua potable y residual tiene como finalidad remover diversos contaminantes; sin embargo, no es eficiente en la desinfección. Esta investigación se propone lograr la remoción de microorganismos patógenos presentes en aguas residuales en condiciones reales, aplicando el proceso de electrocoagulación, sin necesidad de usar cloro.

eaguilaa@ulima.edu,pe

The main objective of this investigation was to evaluate the efficiency of electrocoagulation for the elimination of nitrogen and phosphorous from domestic wastewater and to determine the main operating parameters affecting the process. Accordingly, an acrylic reactor and aluminum (cathode) and iron (anode) electrodes were used. Tests were performed based on a multilevel factorial experimental design, considering current intensity, treatment time, and pH as factors. The design response variables were the percentage of nitrogen and phosphorous removal. In the case of phosphorus, removal rates of up to 99% were reached after 40 minutes of treatment with current intensities of 3 amps and at a modified pH of 6. Nitrogen removal was up to 27% with a treatment time of 40 minutes, 3 amps, and a pH of 6. Statistical analysis revealed that pH did not have a significant effect on the nitrogen remo...

Sludge residue from pumping water treatment obtained by electrocoagulation process (LEC) in fishmeal factories, was used as a feeding ingredient for Tenebrio molitor larvae. LEC was conditioned by three bioprocesses: fermentation with Lactobacillus casei, fermentation with Sacharomyces, and hydrolysis with pancreatin enzymatic mixture. Soybean isolate was used as a control. Larvae consuming LEC-containing diets presented a higher weight gain rate than the controls. The proximal larvae dry basis composition values of fat, ash, and protein (37.2% ± 2%, 3.9% ± 0.4%, and 50.2% ± 4.9%, respectively) did not present significant intergroup differences. LEC contained 4.2% aluminum and its conditioning through fermentation with lactic bacteria reduced its bioavailability in the larvae, with values similar to those of controls (3.9 ± 0.7 µg Al/g). The iron content in LEC-fed larvae was higher...

In the fishmeal industry, seawater is used to transport fish to the factories. Due to this, “pumping water” with high concentrations of organic matter is generated that is treated via chemical coagulation before letting it into the sea. The objective of this study is to characterize and compare the sludge obtained from conventional chemical coagulation and the sludge from the electrocoagulation process. A pilot electrocoagulation plant was built next to a chemical coagulation plant. The sludge obtained from both methodologies was analyzed for its proximal composition, its iron and aluminum content, and the fatty acid profile in its contained fat. Electrocoagulation was found to produce sludge with a higher concentration of lipids and ash, which indirectly confirmed that it removes more organic pollutants and salts than chemical coagulation. The contents of aluminum and iron in the sl...

This study aims to optimize the removal of total suspended solids (TSS) in pump water from fish flour factories through electrocoagulation technology and to determine the effects of the main operation parameters. Pump water has high conductivity (40.1 mS), due to the presence of dissolved salts and contains high concentration of organic substances (12,360 mg/L of TSS and 520 mg/L of fats). In this study, pump water was treated in an electrocoagulation reactor with aluminum electrodes using Response Surface Methodology with a 3kfactorial design based on two factors, current intensity (I) of 8–13 A and treatment time (t) of 20–40 minutes. The percentage of TSS removed from the water was used as the response variable. The results revealed that I and t significantly (p < 0.05) influenced the process. In accordance, the optimal operational parameters for TSS removal were I = 13 A and t = ...

This study focused on reducing total chromium levels in raw wastewater from the leather tanning industry via electrocoagulation to comply with maximum permissible limits (MPL) and to determine the effects of main process parameters. An electrocoagulation reactor was built using aluminum electrodes as an anode and cathode. Then, the response surface methodology was applied using a 3k factorial design considering three factors, namely current intensity, treatment time, and pH. The total chromium removal percentage was considered as a response variable. 99% of the total chromium found in wastewater could be removed after 14-min treatment at 2-A current intensity and pH 5.5. Similar amount of chromium was removed at pH of 8.5 and 7. Statistical analysis performed at a confidence level of p < 0.05 revealed that all three factors influenced electrocoagulation. Total chromium could be efficient...

This study intends to assess the removal efficiency of the chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total suspended solids (TSS) from raw tannery wastewater using electrocoagulation by aluminum electrodes as well as to determine the effects of its main operating factors. Therefore, the response surface methodology was applied through an experimental Box–Behnken design by considering the current intensity (I), treatment time (T), and pH levels as the factors. In addition, the BOD, COD, and TSS removal percentages were considered to be the response variables. The results indicate that the treatment time, current intensity, and pH level were significant for COD and TSS, whereas only the treatment time was significant at a confidence level of p-value < 0.05 for BOD. For COD, the optimal operating conditions were I = 3 A, T = 24 min, and pH = 8.4; for BOD, the opti...

This research determined the efficiency of removal of chemical oxygen demand (COD) by an electrocoagulation process. An electrocoagulation reactor with aluminum and iron electrodes was used to treat water from the treatment plant of the Research Center for Wastewater Treatment and Hazardous Waste. The COD removal percentage was a response variable for the experimental factorial design. The factors influencing the process were current intensity, treatment time, and pH. The best results in the percentage of removal of the COD were very similar to that obtained at a pH of 8.2 and 7, with values of 83% and 84%, respectively, with a current intensity of 7 A and a treatment time of 15 min. However, at 5 A and 10 min, values that exceed 80% removal were obtained. Statistical analysis indicates that only current intensity and time were significant for the response variable. Electrocoagulation is...

The pollution caused by the use of water in many activities of human beings, has taken us to the need of using new technologies to the removal of contaminants from wastewater, one of them is the electrocoagulation. In this research we suggest the construction of an electrocoagulation reactor to evaluate the efficiency in the removal of COD (Chemical Oxygen Demand) from wastewater coming from the painting industry; it also wants to determine the best conditions of pH, conductivity, electric intensity and time of treatment. Based on the results we’ve gotten in the treatment of effluent with electrocoagulation, we determined an average efficiency in the 87 % of COD removal. This optimum ranges were gotten with an electrical intensity of I = 5 amperes, with the natural pH of the effluent in 7,12 and a 15 minutes treatment time, with which we accomplish the environmental compliance of the c...

La contaminación causada por el uso del agua en muchas de las actividades del ser humano, nos lleva a la necesidad de utilizar nuevas tecnologías para remoción de contaminantes de las aguas residuales, una de ellas es la electrocoagulación. En este estudio se planteó construir un reactor de electrocoagulación para evaluar la eficiencia en la remoción de la DQO (Demanda Química de Oxigeno) de aguas residuales provenientes de la industria de pintura; así como determinar las mejores condiciones de pH, conductividad, intensidad de corriente y tiempo de tratamiento. En base a los resultados obtenidos al realizar el tratamiento del efluente con electrocoagulación, se determinó una eficiencia promedio del 87% en la remoción de la DQO. Estos valores óptimos de operación se obtuvieron con una intensidad de corriente I= 5 amperios, con el pH natural del efluente de 7,12 y un tiempo d...