To me the evolution of the ...

Published September 26, 2017 19:14 by Rafael Gay-de-Montella MSc PEng, Water Wastewater Treatment Expert, Oil-Gas, Tailings, Boilers, ZLD; Evaporators, Sludge

To me the evolution of the COD will show the stage where the decomposition of the waste is.
In addition CH4 / CO2 ratio with value 1 (inversion point) at complete solids decomposition.

I suggest Eleazer et al., 1997