Data on treatment of sewage wastewater by electrocoagulation using punched aluminum electrode and characterization of generated sludge

The electrocoagulation setup must be optimized in order to design an economically feasible process. Therefore, in this work, the effect of the punched aluminum electrode on the performance of the electrocoagulation (EC) has been investigated. A series of experiments were performed for treatment of sewage wastewater using plane electrode and compare with punched electrodes. Effect of contact time, voltage, electrode spacing and stirring speed has been optimized for removal of Biochemical oxygen demand (BOD) and Total dissolved solids (TDS). It was observed that the performance of electrocoagulation process increased using punched electrode. Also, the less operating cost noticed in punched electrode as compared to a plane electrode for (70–80%) removal of BOD and TDS. These data would be useful in designing of an EC reactor to obtain high removal efficiency at low energy consumption.


a b s t r a c t
The electrocoagulation setup must be optimized in order to design an economically feasible process. Therefore, in this work, the effect of the punched aluminum electrode on the performance of the electrocoagulation (EC) has been investigated. A series of experiments were performed for treatment of sewage wastewater using plane electrode and compare with punched electrodes. Effect of contact time, voltage, electrode spacing and stirring speed has been optimized for removal of Biochemical oxygen demand (BOD) and Total dissolved solids (TDS). It was observed that the performance of electrocoagulation process increased using punched electrode. Also, the less operating cost noticed in punched electrode as compared to a plane electrode for (70-80%) removal of BOD and TDS. These data would be useful in designing of an EC reactor to obtain high removal efficiency at low energy consumption. &

Value of the data
The effect of the punched aluminum electrode and operating cost of the electrocoagulation (EC) has been investigated.
495% BOD and TDS have been removed from sewage wastewater using punched electrodes. This dataset will be useful for designing of an economically feasible process in wastewater treatment area.
This dataset showed that the less operating cost required for complete removal of pollutant by applying punched electrode as compare to the plane electrode.
From the environmental esthetic point of view, the utilization and disposal of electrocoagulation generated sludge are very important. Therefore characterization of floc generated by EC has been done for further use.

Data
This dataset contains 3 Tables and 7 Figures that represent the performance evaluation of electrocoagulation process using punched electrodes and the plane electrode. The characteristics of collected sewage sample are presented in Table 1. Details of operating parameters are given in Table 2. The different electrode configurations are shown in Fig. 1. The dataset in order to optimize the effect of contact time, voltage, electrode spacing and stirring speed on the removal of BOD and TDS from sewage wastewater is given in Figs. 2-5. The energy consumption and operating cost are demonstrated in Table 3. After electrocoagulation, the sludge was characterized by scanning electron microscopic (SEM EVO 50), energy-dispersive X-ray spectroscopy (EDAX, model Penta FET Precision) and the results are shown Figs. 6 and 7 respectively.

Sample collection
Sewage wastewater was collected from MGD Waste Water Treatment Plant at Pappankalan, New Delhi, India and characterized for various parameters using Water analysis kit (NPC363D, India) (see in Table 1).

Experimental procedure
Experiments were conducted in a 1 L glass beaker in the batch mode of operation using aluminum electrode pair (12.5 cm × 2.5 cm × 0.4 cm). The electrode pair was immersed in wastewater to a depth of 5 cm with the electrodes around 1 cm apart. The effective area of the electrode pair was 12.2 cm 2 . The assembly was connected to a direct current power source (Science tech 4074, India). The experimental setup was similar to provided in our previous studies [1,2]. Experiments were carried out using aluminum electrodes with/without punched holes (see in Fig. 1) to study the effect of electrode configuration on the performance of electrocoagulation. Various operating parameters used    in EC experiments (see in Table 2). The removal efficiency of BOD and TDS from sewage water was investigated after each experiment using Eq. (1) and results are shown in Figs. 2-5. To observe the energy consumption and operating cost throughout the experiments following equations were adapted from literature [3][4][5][6][7] and the results are tabulated in Table 3.

Characterization of EC sludge
The sludge generated during the electrocoagulation treatment is highly complex in nature. In this context, the characterization of electrocoagulation-generated sludge has been performed for manufacturing of non-constructional building blocks (seen in Figs. 6 and 7).