Abstract: Method of testing a landfill for its methane potential comprising selecting a landfill which contains a significant decomposable fraction and a significant non-decomposable fraction, locating a plurality of zones within the landfill with each of said zones having at least one different characteristic, taking at least one sample of the material of the landfill at each of the zones, measuring the content of each of the fractions of each of the samples, and utilizing the ratio of one of the fraction contents to the other of the fraction contents for at least some of the samples to find the approximate methane potential of the landfill.

Abstract: This process removes water and at least some of an impurity from a fluid stream which contains a product fluid. The impurity includes a halogenated hydrocarbon. The process includes removing substantially all of the water from the fluid stream to provide a substantially dehydrated fluid stream and introducing the dehydrated fluid stream to an adsorption zone to adsorb the halogenated hydrocarbon from the dehydrated fluid stream to provide the product fluid. The adsorption zone is regenerated by passing a hot regeneration gas through it to remove the halogenated hydrocarbon. The heat from the hot regeneration gas cracks the halogenated hydrocarbon to provide a gaseous impurity component containing hydrogen and at least one halogen. The gaseous impurity component is removed from the regeneration gas at a location outside the adsorption zone.

Abstract: A method of withdrawing landfill gas from a landfill without drawing air into the landfill comprising providing a well in the landfill and withdrawing landfill gas from the well at a plurality of different withdrawal rates. The pressure at a selected region within the landfill is detected while the landfill gas is being withdrawn. A relationship is then established between the withdrawal rate and the pressure at the selected regions. This relationship is utilized to establish a maximum withdrawal rate, and this maximum rate occurs at approximately zero gauge pressure. Landfill gas is then withdrawn from the well at no more than about the maximum withdrawal rate.

Abstract: A process for purifying a fluid stream which includes an impurity and a product fluid comprising providing three adsorption zones, cycling each of the adsorption zones on stream for the adsorption of the impurity from the fluid stream in a predetermined sequence to provide a substantially uninterrupted flow of the product fluid from the adsorption zones, desorbing the impurity from each of the adsorption zones in a predetermined sequence by sequentially reducing the pressure within each of the adsorption zones sufficiently to desorb the impurity, and repressurizing each of the adsorption zones subsequent to the desorption of such adsorption zone to make such adsorption zone ready for subsequent use for on stream adsorption of the impurity. The duration of the period of desorption for each of the adsorption zones is at least as great as about the duration of the period of on stream adsorption of the impurity.