Method and device for accelerating the decomposition of biogenic organic matter in refuse disposal sites
First Claim
1. A method of aerobically accelerating decomposition of CH4 to CO2 and H2O in garbage dumps covered by an air-permeable covering, which comprises the steps of:
- (a) depositing garbage at a garbage dump ground in a heap or pile;
(b) suctioning out a quantity of dump gases produced by the garbage in the lower third of the pile or heap greater than the quantity of the CH4 produced in the heap or pile through a plurality of suction pipes wherein said suction pipes have suction openings with upper and lower suction effective regions through which the dump gases are drawn off, arranged in the ground region of the dump, wherein the suction openings are filter stretches limited in their upper section effective regions by a gas tight shell, and only in their lower regions have one or more gas suction openings, thereby creating a vacuum at the bottom of the dump to provide suction;
(c) following step (b), suctioning into the lower third of the heap or pile oxygen in atmospheric air through an exterior surface of the air-permeable covering of the dump or pile so that oxygen forcibly traverses the heap or pile and penetrates downwardly into the heap or pile resulting in an oxygen excess; and
(d) directly and uniformly aerating the entire heap or pile with the oxygen excess sucked into the lower third of the heap or pile, to limit CH4 formation from the garbage while effecting an aerobic decomposition of the CH4 to CO2 and H2O, thereby transforming an anaerobic decomposition process into a decomposition which is at least mostly an aerobic decomposition.
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Accused Products
Abstract
The invention relates to a method and device for accelerating the decomposition of biogenic organic matter in refuse disposal sites. According to the method, at least one suction line is inserted into a disposal site debris heap (11) via which the arising refuse site gases are removed by suction. According to the invention, the quantity of gas removed by suction in the area of the bottom of the refuse disposal site should be greater than the quantity of gas arising in this area due to decomposition whereby enabling oxygen from the outside air to penetrate into the debris heap and transforming the decomposition process into an, at least to a large extent, aerobic decomposition.
7 Citations
13 Claims
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1. A method of aerobically accelerating decomposition of CH4 to CO2 and H2O in garbage dumps covered by an air-permeable covering, which comprises the steps of:
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(a) depositing garbage at a garbage dump ground in a heap or pile; (b) suctioning out a quantity of dump gases produced by the garbage in the lower third of the pile or heap greater than the quantity of the CH4 produced in the heap or pile through a plurality of suction pipes wherein said suction pipes have suction openings with upper and lower suction effective regions through which the dump gases are drawn off, arranged in the ground region of the dump, wherein the suction openings are filter stretches limited in their upper section effective regions by a gas tight shell, and only in their lower regions have one or more gas suction openings, thereby creating a vacuum at the bottom of the dump to provide suction; (c) following step (b), suctioning into the lower third of the heap or pile oxygen in atmospheric air through an exterior surface of the air-permeable covering of the dump or pile so that oxygen forcibly traverses the heap or pile and penetrates downwardly into the heap or pile resulting in an oxygen excess; and (d) directly and uniformly aerating the entire heap or pile with the oxygen excess sucked into the lower third of the heap or pile, to limit CH4 formation from the garbage while effecting an aerobic decomposition of the CH4 to CO2 and H2O, thereby transforming an anaerobic decomposition process into a decomposition which is at least mostly an aerobic decomposition. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for aerobically accelerating decomposition of CH4 to CO2 and H2O in a garbage dump in a heap or pile covered by an air-permeable covering, which comprises:
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(a) a plurality of suction pipes included in the heap or pile and extending to the ground region of the garbage dump for suctioning off dump gases from the lower third of the heap or pile, wherein each suction pipe has suction openings with upper and lower suction effective regions arranged in the ground region of the dump, wherein the suction openings are filter stretches limited in their upper suction effective regions by a gas tight shell so that only the filter stretches in the lower suction effective regions have one or more gas suction openings; (b) at least one measurement sensor for analyzing and measuring concentration of dump gases comprising CH4 arising in the heap or pile; (c) a control device for adjusting a throughflow quantity of the dump gases drawn off from the plurality of suction pipes as detected by the measurement sensor; and (d) means for providing suction at the bottom of the heap or pile of the garbage dump for the plurality of suction pipes for suctioning off dump gases and for forcibly introducing flow of oxygen in atmospheric air through an exterior surface of the air-permeable covering of the heap or pile to the bottom of the heap or pile, to directly traverse the heap or pile, providing uniform aeration of the entire heap or pile resulting in an oxygen excess, to effect an aerobic conversion of the CH4 to CO2. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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Specification