english Scum Treatment and Disposal Methods
Effective approaches for managing scum generated in water treatment processes
Scum Pretreatment and Volume Reduction
- Scum produced by dissolved air flotation has high water content requiring pretreatment
- Mechanical dehydration uses equipment like filter presses and centrifuges to apply pressure
- Extracts water to form low-moisture cake for easier disposal
- Natural drying transports scum to drying facilities for evaporation and osmosis
- Adjust pH and viscosity during pretreatment to avoid equipment clogging
- Ensures dehydration efficiency and lays foundation for subsequent treatment
Resource Recycling
- For scum with simple composition and no harmful pollutants
- Scum with high oil content can undergo oil extraction processes
- Extracted oil can be used to produce biodiesel or industrial oils
- Food processing scum meeting standards can be used as organic fertilizer
- Applications in agricultural production or landscaping
- Achieves resource recycling and reduces total waste volume
Safe and Harmless Disposal
- For scum containing harmful pollutants unable to be recycled
- Incineration in specialized facilities decomposes hazardous substances
- High-temperature conditions ensure thorough decomposition
- Flue gas must be purified and treated to meet standards before discharge
- Ash disposed according to hazardous waste management requirements
- Sanitary landfilling with impermeable materials prevents soil and groundwater contamination
Source Reduction Control
- Reducing scum generation at source minimizes treatment and disposal pressures
- Optimize process parameters like flocculant dosage and dissolved air pressure
- Improve pollutant separation efficiency to reduce active substances in scum
- Strengthen front-end pretreatment with screen filtration and pH adjustment
- Remove impurities prone to scum formation at early stages
- Control scum generation at source to reduce treatment burden and cost
