It takes an enormous amount ...
Published by Robert Duff, UtraPure Water/ Wastewater Engineer at SUNY Polytechnic Institute - CNSE
It takes an enormous amount of energy to incinerate water. It would be best to either concentrate the organics into a smaller waste stream before incineration or use wet oxidation and then wastewater treatment . If you stick with incineration the combustion process should incorporate a waste to energy design so you can recover as much energy as possible.