Conventional systems for generating air-saturated water for dissolved air flotation (DAF) are capital - intensive. Furthermore, sophisticated control is required to maintain air dose during changes in process flow and water temperature.
Alternative technologies are now available, including ejectors which combine air compression and dissolution in a compact module. The system has lower capital costs, reaches gas-liquid equilibrium very quickly, and potentially enables easier control of air dose. There was a need to examine these technologies and costs to identify appropriate strategies for new installations and asset replacement.
The research, was undertaken by five contributors, who examined availablity and proven technologies (including strategies taken to control air dose), audit operational systems to assess efficiency, operating costs, reliability and security, and develop comprehensive comparison of the available technologies and their costs.
- Improved security of operation
- Minimisation of capital and operating expenditure for asset management planning
- More informed choice of technology
- Cost effective designs of new plant.