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Leachate Treatment

Electrochemical Processes

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The future use of electrochemical processes in the treatment of leachate has been suggested. This page provides a brief overview of the processes involved for information purposes and does not make any recommendations or specify standards.

Three electrochemical processes may be applicable to the treatment of wastewater, electro-coagulation/electro-flocculation, and electro-oxidation.

Electrodes placed in the leachate can be aluminium or iron. On the application of an electric current coagulants are formed by the dissolution of the anode.

Hydrogen gas is generated at the cathode and oxygen at the anode. Aluminium and iron precipitates that form can be removed by sedimentation or by flotation.

Flotation of low density flocculated particles is aided by the generation of hydrogen and oxygen.

The oxidation of organic substances and ammoniacal-N can occur directly at the anode or indirectly from the degradable content of the solution.

Indicative UK EA BAT requirements for chemical treatment processes General 1. Storage and handling of chemicals is covered in section 2.1.2. 2, of their Sector Guidance Note for IPPC S5.03, Ozonation.

The use of automated on-line dosing of chemical equipment. Manual dosing should be avoided as it reduces the accuracy of addition rates and can lead to overdosing.

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