As far as dustbins inside trains are concerned, designated housekeeping supervisor of the train should decide on emptying and replacing garbage bag as frequently as required.
Of course there has to dedicated garbage-coach.
The garbage thus collected during the entire journey will then be transferred to designated/approved solid waste management operators for further processing (incineration and final disposal)
Organic and inorganic waste should be separated at source.Each coach will have 2 garbage bags (1 for organic and the other for inorganic). Same kind of partition must be there in the garbage-coach.
If railways is interested in international standards, it requires matching efforts, and must be done systematically. Nothing comes cheap, quality involves cost. more
Another major problem is presence of mouse,insects etc in the AC 1st class coach of Rajdhani express .For other trains it ifs further horrible more