Ozonator

An ozone generator, or ozone machine, or ozonator, is a device that you can use to remove bad odors.
You can use an ozone generator to remove bad odors such as:
pet odors:
1. Pet dander is made up of skin flakes and is the most common source of that "pet smell" that is difficult to get rid of with traditional methods. For pet odors in a room, an ozone machine can mask any odors that a human nose can detect.
2. Pet urine – a very common source of strong odors in carpets and porous materials.
3. smells of large cars (transport)
Long-haul and short-haul trucking companies that transport produce, livestock, and many other items that leave behind a variety of odors may need to frequently deodorize their vehicles.
4 cigarette smoke
Smoke is difficult to remove from the air and dangerous to inhale, so it is one of the odors you should take immediate action to alleviate.
5. mold
6. human odors and body odors
7. industrial environments or workplaces

read more about ozone generator and bad odor removal here