Emerging usage of electrocoagulation technology for oil removal from wastewater: A review.

Recent Progress on Electrocoagulation Process for Wastewater Treatment: A Review

Various wastewaters treatment by sono-electrocoagulation process: A comprehensive review of operational parameters and future outlook

An overview on combined electrocoagulation-degradation processes for the effective treatment of water and wastewater.

In this study, the efficiency of ozonation, electrocoagulation and ozone assisted electrocoagulation processes for removal of pollutants from effluent of distillery industry was compared. The experimental results showed that ozone assisted electrocoagulation process yielded higher pollutant removal than ozone and electrocoagulation processes alone. Response surface methodology based on central composite design was used to optimize various operating parameters of the ozone assisted electrocoagulation process for the treatment of industrial effluent. The effects of five independent parameters such as current density(X 1 ), COD concentration(X 2 ), effluent pH(X 3 ), inter-electrode distance(X 4 ) and electrolysis time(X 5 ) on the% COD removal and power consumption were investigated. A quadratic model was used to predict the COD removal and power consumption in different conditions. The significance of independent variables and their interaction were evaluated by ANOVA. In order to achieve the maximum COD removal and minimum power consumption, the optimum conditions were obtained by mathematical and statistical methods. The results showed that maximum COD removal efficiency could be achieved at optimum conditions of X 1  − 3A/dm 2 , X 2  − 3000 ppm, X 3  − 7, X 4  − 1.8 cm and X 5  − 5 h. In conclusion, hybrid electrocoagulation process could be applied successfully for removing pollutants from effluent.

Integrated ozone—electrocoagulation process for the removal of pollutant from industrial effluent: Optimization through response surface methodology

To reduce the water consumption and pollution in car-washing, a combined technique, i.e., electrocoagulation coupled with ultrasound, was proposed to treat the car-washing water for reuse. The effects of parameters (such as current intensity (I), initial pH, electrode distance (d), treatment time (t), and so on) on the removal efficiency of COD and turbidity in the wastewater were studied. The results indicate that the removal efficiency of COD and turbidity is maximum (68.77% and 96.27%, respectively) when I=1.2 A, pH=6.0, d=1.5 cm, and t=20 min. The quality of treated wastewater could meet the COD and turbidity requirements in Water Quality Standard for Urban Water Consumption. Meanwhile, the character of the reaction cell was studied, and it shows that the cell voltage is a linear function of the electrode distance when the current is constant. Compared with the removal rate of pollutants from car-washing wastewater by the single electrocoagulation method, a higher rate could be achieved by this combined technique.

Treatment of Car-Washing Wastewater by Electrocoagulation-Ultrasound Technique for Reuse

Ball-milling as effective and economical process for biodiesel production under Kraft lignin activated carbon stabilized potassium carbonate.

In order to obtain high-speed and large-drive-current during operation, this paper proposed two structure-advanced BiCMOS analog switches. On the key parts of the circuit, a few Bipolar Junction Transistors (BJTs) were used while for the main parts, the Complementary Metal Oxide Semiconductor (CMOS) devices were configured. The component parameters were optimized and the measures for accelerating the operation and raising the drive-current were taken. The performance of the proposed two analog switches was tested through simulation and experiments of hardware circuits. The results indicated that the Delay-Power Product (DP) of the BiCMOS operating in the voltage range of 2.5V~3.5V is reduced by an average of 26.1pJ and the driving current is more than 1.38mA as compared with those of the conventional CMOS analog switches. These advantages show the great potential of the proposed two BiCMOS analog switches in the digital communication systems which require low-voltage, high-speed and large-drive-current.

Two High-Speed and Large-Drive-Current BiCMOS Analog Switches

A high-precision amplifier design in a stander 0.35μm CMOS process was proposed. This design obtains a high-performance by proper application of dynamic element matching to a second generation current conveyor (CCII). In comparison with the traditional CMOS circuits, the proposed approach can not only increase the output swing and decrease output resistance but also compensate the effect of the input offset and 1/f noise voltage. The simulation results show that the gain error is reduced 38~50 times than the traditional amplifier, and the precision is significantly improved. So the proposed circuit is suitable for the design of special amplifiers used in various detections and signal mediation.

Design of CMOS Amplifier Using New CCII Topologies

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Papers

Treatment of Car-Washing Wastewater by Electrocoagulation-Ultrasound Technique for Reuse

Ball-milling as effective and economical process for biodiesel production under Kraft lignin activated carbon stabilized potassium carbonate.

Two High-Speed and Large-Drive-Current BiCMOS Analog Switches

Design of CMOS Amplifier Using New CCII Topologies