Electrochemical degradation of tridecane dicarboxylic acid wastewater with tantalum-based diamond film electrode

Xu, Li; Wang, Wei; Wang, Mingyu; Cai, Yanfei

doi:10.1016/j.desal.2007.01.136

Cited by 16 publications

(8 citation statements)

References 4 publications

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“…2, 3). Similar observations have also been reported by Li et al (2008) that COD decreases with the decrease in distance between electrodes of the same composition. This is because the shorter distance speeds up the anion discharge on the anode and improves the oxidation.…”

Section: Resultssupporting

confidence: 91%

Removal of turbidity, COD and BOD from secondarily treated sewage water by electrolytic treatment

Chopra

Sharma

2012

Appl Water Sci

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A preliminary study was conducted for the removal of turbidity (TD), chemical oxygen demand (COD) and biochemical oxygen demand (BOD) from secondarily treated sewage (STS) water through the electrolytic batch mode experiments with DC power supply (12 V) up to 30 min and using a novel concept of electrode combinations of different metals. The different surface areas (40, 80, 120 and 160 cm 2) of the electrodes as a function of cross-sectional area of the reactor and the effect of inter-electrode distances (2.5-10 cm) on the electrolysis of STS water were studied. This study revealed that the effluent can be effectively treated with the aluminum (Al) and iron (Fe) electrode combinations (Al-Fe and Fe-Al). The maximum removal of TD (81.51 %), COD (74.36 %) and BOD (70.86 %) was recorded with Al-Fe electrode system, while the removal of these parameters was found to be 71.11, 64.95 and 61.87 %, respectively, with Fe-Al electrode combination. The Al-Fe electrode combination had lower electrical energy consumption (2.29 kWh/m 3) as compared to Fe-Al electrode combination (2.50 kWh/m 3). The economic evaluation of electrodes showed that Al-Fe electrode combination was better than Fe-Al electrode combination. This revealed the superiority of aluminum as a sacrificial electrode over that of iron which can probably be attributed to better flocculation capabilities of aluminum than that of iron.

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Section: Resultssupporting

confidence: 91%

Removal of turbidity, COD and BOD from secondarily treated sewage water by electrolytic treatment

Chopra

Sharma

2012

Appl Water Sci

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“…3). Similar observations have also been reported by Li et al (2008) for the removal of COD which decreases with the decrease in distance between electrodes of the same composition. This is because that the shorter distance speeds up the anion discharge on the anode and improves the oxidation.…”

Section: Effect Of Inter Electrode Distancesupporting

confidence: 77%

Removal of nitrate and sulphate from biologically treated municipal wastewater by electrocoagulation

Sharma

Chopra

2015

Appl Water Sci

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The present investigation observed the effect of current density (j), electrocoagulation (EC) time, inter electrode distance, electrode area, initial pH and settling time on the removal of nitrate (NO 3 -) and sulphate (SO 4 2-) from biologically treated municipal wastewater (BTMW), and optimization of the operating conditions of the EC process. A glass chamber of two-liter volume was used for the experiments with DC power supply using two electrode plates of aluminum (Al-Al). The maximum removal of NO 3 -(63.21 %) and SO 4 2-(79.98 %) of BTMW was found with the optimum operating conditions: current density: 2.65 A/m 2 , EC time: 40 min, inter electrode distance: 0.5 cm, electrode area: 160 cm 2 , initial pH: 7.5 and settling time: 60 min. The EC brought down the concentration of NO 3 -within desirable limit of the Bureau of Indian Standard (BIS)/WHO for drinking water. Under optimal operating conditions, the operating cost was found to be 1.01$/m 3 of water in terms of the electrode consumption (23.71 9 10 -5 kg Al/m 3 ) and energy consumption (101.76 kWh/m 3 ).

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“…This was achieved with 20 minutes retention time followed by sand filtration as shown in figure 5. In addition, it is also reported by Li et al, (2008) that COD of effluent decreases with the decrease in distance (0.5 cm) between electrodes of the electro-coagulation treatment cell. This is because the shorter distance speeds up the anion discharge on the anode and improves the oxidation.…”

Section: Characterization Of White Pepper Process Effluentmentioning

confidence: 73%

Coagulation-flocculation treatment of white pepper (<i>Piper nigrum L.</i>) processing wastewater

et al. 2017

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Wastewater generated in white pepper (Piper nigrum L.) processing contains high Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and hydrolyzable tannins that results dark tan/brown colour effluent which cannot be discharged to the environment without proper treatment. Therefore, these experiments were conducted to investigate the effectiveness of electro-coagulation using aluminum (Al) electrodes and coagulation-flocculation with Alum [Al 2 (SO 4) 3 .18H 2 O] in reducing the strength of pepper soaked effluent. A laboratory scale electro-coagulation unit was made using two aluminium plates (9 cm × 5 cm × 0.3 cm) as electrodes leaving a 0.5 cm gap between plates and powered with a 12 V DC power supply through a resistance box which is used to regulate the current density. The current density could be controlled between 0-1 A. Coagulation flocculation with Alum was tested at five doses; 1 to 5 g/L with 1 g increments at laboratory scale. The effluent colour was measured using a spectrophotometer at a wave length of 600 nm. According to the results, removal efficiencies of colour, Turbidity and COD were 94%, 91% and 89%, respectively for 20 minutes of electro-coagulation and 92%, 90% and 92%, respectively with 3 g/L Alum treatment. The pH of the effluent during electro-coagulation for 20 minutes increased to 9.0 while Alum treatment with 3g/L reduced to 5. When treated effluent filtered through a fine sand filter, Total Dissolved Solids (TDS), Electrical Conductivity (EC) and COD could be reduced further and reached the standard values to discharge in to the environment as irrigation water.

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Electrochemical degradation of tridecane dicarboxylic acid wastewater with tantalum-based diamond film electrode

Cited by 16 publications

References 4 publications

Removal of turbidity, COD and BOD from secondarily treated sewage water by electrolytic treatment

Removal of turbidity, COD and BOD from secondarily treated sewage water by electrolytic treatment

Removal of nitrate and sulphate from biologically treated municipal wastewater by electrocoagulation

Coagulation-flocculation treatment of white pepper (<i>Piper nigrum L.</i>) processing wastewater

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