Efficient biological denitrification process for coking wastewater

• Main Authors: LIU BIN, CHEN WEIJIANG, LIU HONGQUAN, GAO MAIXIA, JU PANPAN, HUAI JUNTIAN
• Format: Patent
• Language: Chinese; English
• Published: 25.06.2021
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the technical field of sewage treatment, and discloses an efficient biological denitrification process for coking wastewater, which is characterized by comprising a complete mixing hydrolysis pretreatment system, a multi-stage and multi-section enhanced AO system and a rear DNBF filter denitrification system. The efficient biological denitrification process for the coking wastewater comprises the following steps: 1) ammonia distillation wastewater firstly enters a full-mixing hydrolysis tank through a regulating tank, mud-water mixing is achieved through a built-in stirrer, mud-water separation and sludge backflow are achieved through a rear-end sedimentation tank, the high sludge amount in the hydrolysis tank is guaranteed, and hydrolysis acidification bacteria in the tank conduct ring opening and chain breaking on refractory organic matterS; 2) a multi-stage and multi-stage reinforced AO process is adopted to replace a traditional AO process, firstly, a carbon source is reasonably d