Energy Consumption of Dissolved Air Flotation Systems

1

Impact of Equipment Type on Energy Consumption

• Different types of DAF systems have significantly different energy consumption profiles.
• Traditional pressurized DAF systems require maintaining high-pressure environments, resulting in high energy consumption from pumps and air compressors.
• Shallow DAF systems rely on efficient separation structures and don't require high-pressure operation, reducing energy consumption by more than 30% compared to traditional types.
• High-efficiency DAF systems optimize dissolved air efficiency and reduce power equipment load, resulting in moderate energy consumption.

2

Energy Consumption Correlation of Operating Parameters

• The setting of operating parameters directly affects energy consumption levels.
• Excessive dissolved air pressure or reflux ratio can lead to power equipment overload and sharp energy consumption increases.
• If influent suspended solids concentration exceeds design range, operating power must be increased to ensure treatment effectiveness, indirectly increasing energy consumption.
• Reasonable parameter adjustment to keep equipment in its optimal operating range can effectively control energy consumption.

3

Energy Consumption Optimization Space of Process Support

• Process support design has a profound impact on energy efficiency.
• Variable frequency control systems allow dynamic adjustment of equipment power based on influent quality, avoiding ineffective energy consumption.
• Pretreatment units reduce influent impurity content, decreasing flotation system operating load and indirectly saving energy.
• High-efficiency dissolved air releasers improve dissolved air utilization and reduce power consumption.

4

Impact of Operation and Maintenance Management on Energy Consumption

• Standardized operation and maintenance management can effectively control energy costs.
• Sludge buildup and pipe blockages increase operating resistance and lead to higher energy consumption.
• Regular cleaning and maintenance keep equipment running efficiently and prevent energy waste.
• Improper chemical dosing affects treatment effectiveness and indirectly increases energy consumption.
• Precise chemical control reduces overall energy costs and ensures low-energy system operation.