WATER TREATMENT

PURPOSE:To always stably remove ammonia and org. matter without being affected by the fluctuation in dissolved materials by adding phosphorus and ammonia to water to be treated while gradually increase the amt. thereof from a season when the climatic temp. begins to fall. CONSTITUTION:The phosphorus 7 and the ammonia 6 are added to the water 1 to be treated while the amt. thereof is gradually increased from the season, past a summer or hot season, when the climatic temp. begins to fall. The concns. of the ammonia and phosphorus necessary for propagating microorganisms, such as nitrate bacteria, growing in a biological active carbon adsorption pond 5 are thereby assured and the propagation of the microorganisms in the biological active carbon adsorption pond 5 is accelerated. The microorganisms are sufficiently cultured in the seasons from a summer to autumn to assure the sufficient microorganisms in a winter or cold season when the concn. of the ammonia in the water 1 to be treated increases. The ammonia and org. matter are thus removed always stably throughout the year without being affected by the fluctuations in the dissolved materials.