Non-biodegradable wastes are a problem in waste handling. Because through aerobic and anaerobic treatment biodegradable wastes can be teated and converted into other forms like biogas, and it will reduce the waste volume also.
But when you have non-biodegradable they dont get treated in the process, only thing you can to is filter them out before nomal treatment.
After normal treatment, you can incinerate non-biodegradable solid wastes and if you cant do it you have to dump those wastes, Both these two methods it will cost you extra money and tiem and labor.So this makes it difficult to handle them
Solid wastes are the wastes that are in solid form. This includes plastics, industry waste, papers and etc, actually municipal solid waste also comes under this category
Muncipal solid waste includes, primarily, the organic wastes, foo, vegtables and and hotel wastes, paper etc, almost everything solid that you find in an urban area.