Which additive (residue) should I mix with a WWTP sludge (30% C, 4%N) for composting achieving a C/N ratio higher than 20 in the mixture?

The C/N ratio of the sludge is around 6. But the levels of %C is quite high, I modelled the process mixing the sludge with the straw but the amounts of straw needed are too high because instead, a...

14 November 2014 6,592 12 View