Charcoal: Charcoal is on the top of the list of smell deodorizers as it is one of the best absorbent agents that can soak up the bad odor. Charcoal is also widely used as water filters and in most odor-removing commercial products. You can put a medium-sized chunk of charcoal inside your smelly patio for instance, and leave it there for a couple of days. You will notice that it can effectively remove the trash can smell.
Outdoor trash bins with flaps are better at keeping the waste contained, even controlling smells to a certain degree. However, these receptacles are also more prone to getting broken or needing to be cleaned, since the flap comes into constant contact with the waste.