Air leakage and ammonia emissions from covered slurry storage tanks

• By measuring the decay in concentration of an injected trace gas at different occasions, the air flow leakage was determined in three covered slurry storage tanks with the following coverings, wooden roof, plastic tent and concrete roof. Air from five different locations in the air space inside the tanks was sucked to an infrared spectrophotometer. The studies demonstrated that trace gas technique can be a reliable method of determining the air leakage from covered slurry storage tanks. It was not possible to observe any form of layering/accumulation of the gas in any specific areas of the tanks. Individual measuring locations showed very small differences in the decay process both with and without mixing of the air volume above the slurry. Measurements indicated that wind may have a considerable effect on the air leakage from the tanks. The mean values of the air exchanges for the tanks varied between 0.33 and 0.86 m3/ m2, h. The plastic tent had the lowest air exchange in relation to the bottom area

Ämnesord

LANTBRUKSVETENSKAPER  -- Husdjursvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Animal and Dairy Sience (hsv//eng)

LANTBRUKSVETENSKAPER  -- Veterinärmedicin (hsv//swe)

AGRICULTURAL SCIENCES  -- Veterinary Science (hsv//eng)

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