Advanced On-Line Instrumentation Helps DAF Systems Lower Costs
Many food processors use dissolved air flotation (DAF) to remove fats, oils and grease (FOG) and suspended solids from their wastewater streams. In DAF operations, chemical coagulant and flocculant additions are often required, and dosage rates are typically kept on the high side because of the wide, sudden variations in influent water quality that are characteristic of food processing facilities. Because periodic jar tests can provide a snapshot of loadings current only at the time the sample was pulled, operators typically overfeed coagulant and flocculant to play it safe. This can be an expensive procedure, however.
Advanced on-line instrumentation in DAF operations provides the capability of optimizing system performance while significantly lowering chemical usage. The continuous, real time measurements from these new sensors can provide for automated and optimized chemical feed regardless of wide load variations.
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