What are the Effects of Unusual Operational Conditions on the Plant. Is it Possible for Explosive Methane Concentrations to Ever Occur?
Yes, it is. Do always be diligent in the presence of landfill gas/methane, and obtain advice from experts. One possibility, in terms of adverse effects on emissions from the plant, is the situation where the plant has been allowed to be filled entirely with untreated leachate before being turned on. In such a situation, the initial flush of gas from each reactor, as the first air passes through the leachate, will undoubtedly contain potentially methane concentrations exceeding the LEL if unventilated. As this mixes with air explosive concentrations of methane gas (between the lower and upper explosive limits) will then be present. This is in exactly the same manner as any pumping chamber, or confined leachate storage tank etc, will also be liable to contain an explosive and hazardous atmosphere. Indeed, each methane stripping reactor will contain such a a potentially explosive atmosphere within it, before the air supply is even turned on. This potential situation must obviously be born
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