Image credit: (above) AI-generated image of Eco-wizard Titus Diggs as he wields his wand to move organic waste to the recycling site known as the Hogwash.
Meet Titus Diggs, Hogwarts Director of Sanitation. No he never went to Hogwarts (not everybody gets in you know!) But he rose from being a humble scouring sorcerer to become a Ministry-certified Professional Eco-wizard. It's his job to organize and oversee trash collection and removal. Organic waste goes to the reed-bed recycling site (pictured above) known as the Hogwash (...I couldn't resist). The rest is hauled away by...
Image credit: (above) AI-generated image of Stercutius Cropper, head of Eco-Wizard Environmental Services, as he directs his scouring sorcerers to collect and haul trash away from Hogwarts.
...Stercutius Cropper IV, head of Eco-Wizard Environmental Services, and his crew of scouring sorcerers. He is as flinty-eyed as he appears. And no he didn't go to Hogwarts either. Unlike most non-Hogwarts wizards, he is a full-fledged, Ministry-recognized, wand wielding wizard. How? His father sent him overseas to be educated. And no, he did not go to Durmstrang or Beauxbatons. Chew on that, boys and girls (hee hee).
To see the actual magical solid waste management facility that receives Hogwarts' rubbish, visit Hogwarts Waste Management Facilities. For a look at the junkyard where all of the non-organic waste that can't processed goes, visit Hogwarts Waste Management Facilities Chapter 2.