| Then they poured distilled water into the columns and captured this leachate as it flowed out the bottom into flasks. |
| The treatment of leachate and the safe disposal or even use of landfill gas are components of an environmentally sound waste management policy. |
| Sludge in the landfill ferments and produces polluting leachate and greenhouse gases. |
| Many of these are soluble in water and become dissolved in any surplus moisture in the landfill site to produce a liquid mixture termed leachate. |
| The leachate was collected and then chemically converted to true saltpeter, potassium nitrate, by mixing it with a solution of potash. |
| The residual material no longer produces methane, and leachate is much reduced. |
