NOVELTY - Animal excrement is stacked in composting workshop, ventilating naturally to achieve a composting temperature of 55-65 degrees C in every 3-4 days when the atmospheric temperature is 25-40 degrees C in summer or in every 5-6 days when the atmospheric temperature is 5-15 degrees C in winter. When the composting temperature is 55-65 degrees C, the composting layer is turned over and mixed using a turning and mixing machine. When the concentration of ammonia is more than 33 ppm in the environment, dilute sulfuric acid is sprayed and atomized to neutralize ammonia in the compost.    USE - Removal of ammonia and conservation of nitrogen in animal excrement composting workshop.    ADVANTAGE - The method enables economical ammonia removal and nitrogen conservation. Air pollution by ammonia and loss of nitrogen are prevented.    DETAILED DESCRIPTION - Sulfuric acid solution with a concentration of 98% is diluted with distilled water, to obtain dilute sulfuric acid with a concentration of 0.8-1.2 %W/V. Animal excrement is stacked in composting workshop, ventilating naturally to achieve a composting temperature of 55-65 degrees C in every 3-4 days when the atmospheric temperature is 25-40 degrees C in summer or in every 5-6 days when the atmospheric temperature is 5-15 degrees C in winter. When the composting temperature is 55-65 degrees C, the composting layer is turned over and mixed using a turning and mixing machine. When the concentration of ammonia is more than 33 ppm in the environment, the dilute sulfuric acid is sprayed and atomized using an acid mist spraying device to neutralize ammonia in the compost.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view explaining the removal of ammonia and conservation of nitrogen in animal excrement composting workshop. (Drawing includes non-English language text)    Dilute sulfuric acid solution tank (1)    Ammonia concentration sensor (4)    Atomizing nozzle group (6)    Ambient temperature sensor (7)    Composting-layer sensor (9)