METHOD FOR TREATING HIGHLY-CONCENTRATED WASTEWATER CONTAINING NITROGEN

摘要

PURPOSE: Provided is a method for treating highly-concentrated wastewater containing nitrogen with high treatment efficiency without depending on temperature fluctuation and seasons. CONSTITUTION: The method comprises the steps of installing an anaerobic digestion tank before an anoxic/aerobic tank; reducing COD of wastewater in the anaerobic digestion tank; introducing the outflow of the anaerobic digestion tank to the anoxic/aerobic tank; and bypassing raw wastewater to the anoxic/aerobic tank without by way of the anaerobic digestion tank to suppress temperature rise of wastewater in the anoxic/aerobic tank, wherein the bypass flow rate is adjusted so as for bypass quantity to be 0.4 to 0.6 times total quantity of raw water when ambient temperature is about 10 to 20°C.