Coking wastewater biochemical treatment system and process

• Main Authors: LIU BIN, CHEN WEIJIANG, LIU HONGQUAN, WANG CHONGPU, KONG XINGHUA, JU PANPAN, BAI TIANQIAO
• Format: Patent
• Language: Chinese; English
• Published: 25.10.2022
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a coking wastewater biochemical treatment system and process. The system comprises a pre-aeration system, a hydrolysis tank, an anoxic tank, an aerobic tank and a secondary sedimentation tank which are connected in sequence, the pre-aeration system comprises an aeration tank, a contact tank and a sedimentation tank; the hydrolysis tank comprises a tank body, and the interior of the tank body is divided into a plurality of reaction chambers with sludge layers; a water turning plate extending downwards is arranged on the top surface of each reaction chamber; a first pipeline and a second pipeline are respectively arranged at the upper parts of the reaction chambers at two ends. The treatment process comprises the following steps: mixing aerated muddy water and ammonia distillation wastewater in the pre-aeration system to reduce toxicity and load, feeding into the hydrolysis tank for hydrolysis, carrying out anoxic treatment and aerobic treatment, and discharging the precipitate. The was