this question is not clear and need to be elaborated. 

Dear Bhaskar,

Municipal waste is not a homogeneous material. It will be almost impossible to compose a representative sample. The best you can do is collect samples from some local sources such as schools, residences, restaurants, instutions and compare them. In addition, at present there are many separation and recycling initiatives that render the usefulness of raw waste composition questionable. I have made a few experiments that may give you a clue on how to proceed. Here they are. 

The prospect of municipal waste landfill diversion depends on geographical location"

The Environmentalist, Springer International

vol. 22  no. 4  pp. 319-324  (2002)  ISSN 0251 1088 (print) 1573-2991(electronic)  http://dx.doi.org/10.1023/A:1020710829477 

“The tale of garbage composition” (invited forum paper)

International Journal of Environment and Waste Management, Inderscience International

vol. 14 no. 4 pp. 414-415 (2014) ISSN 1478 9876 (print) and 1478 9868 (electronic)

                                                http://www.inderscience.com/jhome.php?jcode=ijewm go to volume 14 issue 4

I have also studied the heating value of waste and came to the conclusion that it is similar to that of sugar cane bagasse. Unfortunately, that publication is written in Portuguese.

Good luck,

Manfred

Dear Bhaskar,

Please find attachment.

Regards

Krishna

I'll advice you use a multi stage stratified random sampling approach. Strata can be Residential, Commercial, Institutional, Health facility.