METHOD OF USING AN ACTIVATED SLUDGE CONTAINING AEROBIC BACTERIA TO REMOVE NITROGEN AND PHOSPHORUS FROM WASTE WATER

摘要

PROCESS USING AN ACTIVATED SLUDGE CONTAINING AEROBIC BACTERIA TO REMOVE NITROGEN AND PHOSPHORUS FROM WASTE WATER; THE RESIDUAL WATER IS INTRODUCED CONTINUOUSLY AND GRADUALLY INTO A TREATMENT BASIN 38 CONTAINING THE SLUDGE TO FORM A MIXED LIQUOR THEREOF, IT IS REPEATED AT LEAST TWICE A CYCLE ENDING IN TWO HOURS, CONSISTING OF A STirring stage and OF AN AERATION STAGE OF WHICH THE RELATIVE DURATIONS ARE BETWEEN 11 AND 15, THE MIXED LIQUOR BEING IN THE AGITATION STAGE IN AN ANOXIC CONDITION WHERE NITRIFICATION IS CARRIED OUT THEN IN AN ANAEROBIC STATE OR AEROBIC BACTERIA PHOSPHORUS, WHEN IN THE AERATION STAGE, A DENITRIFICATION IS CARRIED OUT WHILE THE BACTERIA INGREE A CONSIDERABLE QUANTITY OF MIXED LIQUOR PHOSPHATES.