Parallel DAF Chambers for High Flowrate Wastewater Treatment
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Solution Overview
Problem
Current wastewater treatment systems using dissolved air flotation (DAF) chambers are limited in handling high flowrates without increasing the cross-sectional area and height, which compromises the efficiency of the 'funneling effect' and leads to operational challenges.
Innovation Solution
The implementation of two or more DAF chambers with a submerged contact chamber, a pressurized dissolver, and a recirculation pump to create air-saturated water that forms bubbles adhering to suspended matter, along with automatic control valves and timers to manage the liquid level and float material discharge, ensuring efficient treatment at high flowrates without enlarging the chamber size or height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cross-sectional area and height of the DAF chamber are increased to handle higher flowrates, then the flowrate capacity is improved, but the chamber height becomes impractically high and the funneling effect efficiency deteriorates
Solution Approach 1:
The single DAF chamber is divided into multiple separate chambers arranged in parallel. Each chamber maintains a practical height while collectively handling the total required flowrate. The chambers share common piping systems for feed water input, air saturation, and effluent discharge, achieving high productivity without increasing individual chamber dimensions.
2Productivity
If the cross-sectional area of the DAF chamber is increased to handle higher flowrates, then the flowrate capacity is improved, but the funneling effect efficiency deteriorates
Solution Approach 1:
Instead of using one large cross-sectional area, the system uses multiple smaller chambers in parallel. Each chamber maintains an optimal cross-sectional area for efficient funneling effect, while the aggregate capacity of all chambers handles the total required flowrate.
3Productivity
If the chamber height is increased to handle higher flowrates, then the flowrate capacity is improved, but the operational efficiency and space utilization deteriorate
Solution Approach 1:
The system segments the treatment capacity across multiple chambers of practical height, improving ease of operation and space utilization while maintaining high flowrate capacity through parallel configuration and shared piping infrastructure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for effective treatment of high flowrates, maintaining the efficiency of the 'funneling effect' and enabling operation within height and space restrictions, making it suitable for environments with stringent flowrate requirements.
Implementation Method 1
dissolved air flotation (DAF) chamber which receives treated water from chamber 110 using recirculation pump 116 that saturates the water with air. The air bubbles adhere to suspended matter in the water or wastewater, causing the suspended matter to float to the surface of the chamber
Implementation Method 2
coagulation coil 104 (to which coagulant and flocculent is added using respective pumps 106 and 108)
Implementation Method 3
coagulation coil 104 (to which coagulant and flocculent is added using respective pumps 106 and 108)
Data Source
AI summary
The present invention relates to a treatment system, apparatus, assembly, facility, cycle and/or method for the treatment of water or wastewater, in particular, a system, apparatus, assembly, facility, cycle and/or method for treating water or wastewater received at high flowrates (including in excess of approximately 200 L/min) through a series of two or more dissolved air flotation chambers.