Describe in detail the methods of collection system with a flow diagram and the type of vehicle used for the collection system.

The waste collection system involves several steps and different types of vehicles. Here's a detailed description:

1. Curbside Collection: This is the most common method of waste collection in urban areas. The waste is placed in bins or bags and left at the curb of the street. The type of vehicle used for this method is usually a garbage truck with a rear loader, side loader, or front loader.

2. Door-to-Door Collection: In this method, waste collectors go from door to door to collect waste. This is common in rural areas or in areas where curbside collection is not feasible. The type of vehicle used can vary, but it is usually a smaller truck or van.

3. Centralized Collection: In this method, residents bring their waste to a central location, such as a waste transfer station or recycling center. The type of vehicle used for this method is usually a larger truck or trailer.

4. Drop-off Centers: These are designated areas where residents can drop off their waste. These centers are usually located in convenient locations, such as shopping centers or community centers. The type of vehicle used for this method is usually a larger truck or trailer.

5. Buy-back Centers: These are centers where residents can sell their recyclable waste, such as bottles and cans. The type of vehicle used for this method is usually a larger truck or trailer.

Here's a flow diagram of the waste collection system:

1. Waste is generated by residents.
2. Residents place their waste in bins or bags (for curbside collection) or bring their waste to a central location (for centralized collection).
3. Waste collectors collect the waste using the appropriate vehicle.
4. The waste is transported to a waste transfer station or recycling center.
5. The waste is sorted and processed.
6. The waste is disposed of or recycled.

Different types of vehicles are used depending on the method of collection and the type of waste. For example, rear loader trucks are commonly used for curbside collection of household waste, while larger trucks or trailers are used for transporting waste from centralized collection points or drop-off centers to waste transfer stations or recycling centers.