Briefing: Continuous-flow RF–oxidation system for dairy manure treatment

A newly designed continuous-flow radio-frequency oxidation system for treating dairy manure slurry was evaluated. The suitability of the treated liquid dairy manure for struvite (MgNH₄PO₄·6H₂O₂) production and for use as liquid organic fertiliser was examined. The results indicated that the radio-frequency oxidation system was very effective for treating dairy manure; approximately 73% of the total soluble phosphorus, 48% of orthophosphates and 32% of soluble chemical oxygen demand were released. The resulting solution met stoichiometric equivalence requirements for the production of struvite and struvite-(K), and it also contained an excellent fertiliser value which can be used as liquid organic fertiliser.