Waste water treating device and method based on electrochemical principle
A wastewater treatment and electrochemical technology, applied in the field of environmental engineering, can solve the problems of increasing energy consumption, reducing treatment efficiency, and large electrode consumption, and achieve the effects of preventing electrode passivation, prolonging equipment life, and reducing equipment energy consumption
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[0038] Example 1:
[0039] To treat coking wastewater, the coking wastewater used is the effluent of the secondary sedimentation tank after biochemical treatment. The distance between the plates is 8mm, the anode and cathode are made of aluminum electrodes, the input voltage of the pulse power supply is 220V, the input frequency is 50Hz, the power supply duty ratio is 60%, the output frequency is 3000Hz, and the output current is 1A / m 2 , the processing time is 10min. The flocs are removed by static separation, and the effluent complies with the coking chemical pollutant discharge standard (GB16171-2012). The water quality indicators before and after treatment are shown in Table 1.
[0040] Table 1: Changes in water quality indicators after coking wastewater treatment
[0041]
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[0042] Example 2:
[0043] Treatment of wastewater containing a variety of heavy metals. The distance between the plates is 10mm, the anode and cathode are aluminum electrodes, the input voltage of the pulse power supply is 220V, the input frequency is 50Hz, the power supply duty ratio is 70%, the output frequency is 500Hz, and the output current is 6A / m 2 , the processing time is 45min. The concentrations of heavy metals in the water before and after treatment are shown in Table 2.
[0044] Table 2: Concentration change of heavy metal wastewater after treatment
[0045]
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