Why treat leachate when it can be evaporated by spraying or irrigation, or why not just re-circulate it into the rubbish?
A. Most landfills can be operated satisfactorily for at least some periods in their lifetimes in this manner, and, if so and no significant negative environmental impact results, these methods are cheap and effective in avoiding damaging leachate discharges. Unfortunately, in those regions of the world where rainfall exceeds what can be effectively evaporated during winter or rainy seasons, this is often not feasible.
