All households, or better yet, all buildings and places where people congregate will have trash that need to be disposed of. That is the main purpose of garbage collection. All the trashes they collect are dumped in designated locations for proper disposal. The garbage is often segregated as biodegradable and non-biodegradable. It means that garbage that naturally decomposes and those that do not, like plastics and bottles, are disposed of in different manners. The dumpster rentals would also have its ways of disposing junk. Source for more about dumpster rentals.
Garbage that is organic is often converted to compost that serve as something like a fertilizer. Metal, steel, glass and plastic are often recycled. The same is done with waste paper that processed to be paper material again.
Ways of disposal
There are many ways of disposal of garbage. In the earlier days of disposal, it was incineration of garbage and there was no segregation as to type of trash, except for glass and metal. Plastics were also burned then along with other garbage. As trash was becoming a problem because of increasing volume, land fill was done to dispose of them. Land fill was a good option because after the fill level is reached, the garbage dumped was covered with soil. All decomposed except for plastics.
Other ways of disposal being used now are gasification, composting, microbiological decomposition and anaerobic digestion. These are processes developed that are more environmental friendly that hardly make use of oxygen.
Waste disposal services
The many types of trash and junk are sort of posing a problem for waste management. Electronic devices has become part of the problem because once they are junked they have various parts that could be toxic if burned or incinerated. Fortunately, manufacturers have encouraged people to drop their junked items in designated places.