Basic description of the above process flow: Production wastewater (liquid) is mainly discharged continuously, and the water quality of the continuously discharged wastewater is weakly acidic after regulation. The main pollutants are P and heavy metals. The wastewater from the workshop outlet flows into the regulating tank to stabilize the water quantity and quality, and to mix the wastewater quantity and quality for subsequent treatment. The main pollutants in the waste liquid are pH value, P, and some heavy metal ions. Afterwards, the wastewater is pumped into the first stage reaction tank by a lift pump, and adjusted to a suitable pH value by adding calcium hydroxide to remove zinc and other heavy metal ions. Under the action of coagulants and coagulants, sludge water separation is carried out in the inclined tube sedimentation tank, and the supernatant enters the next treatment stage; The sludge is discharged into the sludge drying tank, and after drying, the sludge cake is transported outside. After sedimentation, the wastewater enters the intermediate water tank and is then pumped into a multi-media filtration tank for filtration before being discharged in compliance with standards.
Based on the analysis of the inflow volume and pollutant types, this sewage treatment project has determined to use flocculation sedimentation+multi-media filtration method to remove pollutants from the water. The process flow is as follows:
Basic description of the above process flow:
The production wastewater (liquid) is mainly discharged continuously, and the water quality of the continuously discharged wastewater is weakly acidic after regulation. The main pollutants are P and heavy metals. The wastewater from the workshop outlet flows into the regulating tank to stabilize the water quantity and quality, and to mix the wastewater quantity and quality for subsequent treatment. The main pollutants in the waste liquid are pH value, P, and some heavy metal ions. Afterwards, the wastewater is pumped into the first stage reaction tank by a lift pump, and adjusted to a suitable pH value by adding calcium hydroxide to remove zinc and other heavy metal ions. Under the action of coagulants and coagulants, sludge water separation is carried out in the inclined tube sedimentation tank, and the supernatant enters the next treatment stage; The sludge is discharged into the sludge drying tank, and after drying, the sludge cake is transported outside. After sedimentation, the wastewater enters the intermediate water tank and is then pumped into a multi-media filtration tank for filtration before being discharged in compliance with standards.