De or het mestvergisting?

The correct Dutch article is:

de mestvergisting

Rule Words ending in -ing: almost always de. See the rule

How to use mestvergisting

the mestvergistingde mestvergisting
this mestvergistingdeze mestvergisting
that mestvergistingdie mestvergisting
our mestvergistingonze mestvergisting
your mestvergistingjouw mestvergisting
every mestvergistingelke mestvergisting
which mestvergisting?welke mestvergisting?
a big mestvergisting / the big mestvergistingeen grote mestvergisting, de grote mestvergisting