Secondary Dissolved Air Flotation (DAF) Systems Application in Food Wastewater Treatment

Application info:

Installation address: A famous food factory in Shanghai

Industry: Fast Food and Convenience Food Processing

Wastewater Characteristics:

Wastewater Composition: Contains grease and suspended solids

WWTP Capacity: 800m3/d

PH Value: 6-8 (Neutral to slightly alkaline)

COD: 500-800 mg/L

Effluent discharging Requirements: Must meet the standards for discharge into the municipal sewage network

Treatment Process Flowchart:

Oil Separator → Equalization Tank → Primary DAF → A/O Tank → Sedimentation Tank → Secondary DAF → Discharge into Sewer

Secondary DAF (dissolved air flotation) Equipment Performance:

Influent Suspended Solids (SS): 150-300 mg/L

Effluent Suspended Solids (SS): Less than 30 mg/L