Is there a youtube channel all about how chemical waste is neutralized for disposal? What happens to the tub of very basic water and maybe some bleach? Just pour down the drain? What pHs are safe to pour down the drain? How is more complex waste, like containing pharmacological products or heavy metals, neutralized and disposed?
It all really depends. For liquid wastes, you probably want to get it close to neutral so that it doesn't mess up your plumbing if you pour it down the drain. For any complex organic or any inorganic stuff, you probably want to capture it and then send it to a chemical disposal facility.