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Integrated Chemical Dosing DAF Machine with Coagulation and Flocculation
This Integrated Chemical Dosing Dissolved Air Flotation Machine combines the flotation separation cell with a complete pre-treatment chemical conditioning system into a single compact factory-pre-engineered package. The system arrives on-site with three independently controlled chemical dosing stations for coagulant, pH adjustment, and flocculant polymer each mounted on a common structural steel base frame with interconnecting pipework, injection quills, and static mixers pre-installed and leak-tested at the factory.
The integrated design eliminates the engineering coordination, separate procurement, and field piping typically required to connect standalone dosing skids to the DAF unit, reducing total installed cost by twenty-five to thirty-five percent and cutting site installation time from weeks to days. Each dosing station includes a chemical storage tank with level indicator, a variable-speed metering pump with stroke adjustment, a calibration column for flow verification, and a static in-line mixer immediately downstream of the injection point to ensure complete chemical dispersion before the wastewater enters the flocculation chamber.
The two-stage flocculation zone features independent variable-speed paddle agitators optimized for the distinct mixing intensity requirements of coagulant neutralization versus polymer floc bridging, ensuring optimal chemical utilization and minimizing excess chemical carryover into the treated effluent.
Key Features
Triple Independent Dosing Stations: Dedicated chemical preparation and metering systems for coagulant aluminum or ferric salts, pH correction acid or caustic, and high molecular weight flocculant polymer each with individual pump control and monitoring.
Pre-Engineered Package Design: All chemical systems mounted on a common structural steel skid with interconnecting pipework, injection quills, static mixers, and isolation valves fully assembled and factory tested before shipping to your site.
Two-Stage Flocculation Chamber: Rapid mix zone with high-shear turbine agitator for coagulant dispersion followed by a gentle tapered flocculation zone with slow-speed paddle mixer for optimal floc growth without shear-induced breakage.
Calibrated Chemical Feed Verification: Each metering pump includes a draw-down calibration column with graduated markings allowing operators to quickly verify actual chemical feed rates against setpoints without additional analytical instrumentation.
Anti-Siphoning Injection Assembly: Spring-loaded injection quills with integral check valves prevent process water backflow into chemical lines during pump shutdown, eliminating cross-contamination and maintaining dosing accuracy on system restart.
Bunded Chemical Containment: Integrated spill containment bund surrounding the chemical tank area captures accidental leaks or overflows, preventing chemical release to the environment and simplifying regulatory compliance documentation.
Pre-Piped Sample Ports: Strategically located sampling valves after each dosing stage enable operators to collect jar test samples for periodic chemical dose optimization without interrupting continuous system operation.
Technical Specifications
Parameter
Specification
Model Series
ECER-DAF-CD Series
Flow Rate Range
5 - 60 m³/h
Dosing Stations
3 Independent (Coagulant, pH, Polymer)
Chemical Tank Volume
100 - 500 Liters per Station
Metering Pump Type
Diaphragm, Variable Stroke and Speed
Pump Turndown Ratio
10:1 (Manual or Automatic Control)
Flocculation Stages
Rapid Mix plus Tapered Slow Mix
Static Mixer Type
Helical Element Inline Mixer
Spill Containment
Integrated Bunded Base Structure
SS Removal Efficiency
≥ 92%
Total Installed Power
4.0 - 12 kW
Applications
The integrated chemical dosing DAF is the ideal solution for facilities that process variable wastewater compositions requiring flexible and responsive chemical treatment programs.
Industrial Laundry Operations: Washing diverse textile types including heavily soiled workwear, restaurant linens, and healthcare fabrics benefit from the ability to adjust chemical dosing programs between different wash campaigns to maintain consistent effluent quality parameters.
Concrete Manufacturing Plants: Ready-mix concrete and precast manufacturing plants recycling process water with highly variable suspended solids concentrations and pH levels depend on the responsive integrated dosing system to maintain treatment performance through production changes and material formulation variations.
Food Processing Facilities: Poultry and meat processing facilities experiencing hourly variations in fat and protein loadings from different slaughter and cutting operations rely on the flexible three-station chemical system to automatically compensate for continuously changing influent characteristics.
Centralized Wastewater Treatment: Centralized industrial wastewater treatment facilities accepting tanker-delivered liquid waste from multiple generators with unknown and variable compositions trust the integrated chemical conditioning to handle the wide range of contaminants without requiring operator intervention for each incoming delivery.
Metal Surface Treatment: Metal surface treatment and anodizing lines generating alternating acidic and alkaline rinse waters with dissolved metal concentrations use the pH adjustment station to maintain optimal coagulation pH throughout the production cycle for consistent metal hydroxide precipitation and removal performance.
Packaging & Quality Assurance
Each integrated chemical dosing DAF system completes a full wet commissioning test at our factory using water to verify hydraulic balance, chemical pump calibration, flocculator operation, and skimmer function before being drained and prepared for shipment.
The complete package is secured on a welded steel shipping frame that serves double duty as the permanent installation base, eliminating the need for a separate concrete foundation in many installation scenarios. All chemical tanks are drained, flushed, and dried before packing, while metering pumps receive protective shipping brackets to prevent calibration drift during transit.
Documentation includes a complete process and instrumentation diagram, chemical dosing calculation spreadsheet, pump calibration curves, recommended chemical preparation and handling procedures, material safety data sheets for common coagulants and flocculants, and a comprehensive commissioning guide.
We provide a twelve-month warranty on all components with optional startup assistance where our commissioning engineer visits your site to supervise installation, perform initial chemical calibration, train your operators on chemical preparation and dosing adjustment procedures, and verify treatment performance against design specifications during the critical first week of continuous operation.
