Case Study: Gerber

Ferric, Manganese and Hydrogen Sulfide removal for Gerber baby food manufacturing plant

 

Project ID:

Company: Gerber
Location: Costa Rica
Year: 2003
Description: Process water for baby food manufacturing plant
Goal: Ferric, Manganese and Hydrogen Sulfide Removal
Capacity: 65 m3/hr
Water Source: 3 private deep wells

The Problems:

  • The plant’s well water contained Ferric, Manganese and Hydrogen Sulfide.
  • Water color and turbidity above the maximum allowable level.
  • Un-controlled chlorine levels.
  • High delta pressure on the media filters was reducing the flow rate.
  • Microbiological contamination, especially by sulfate reducing bacteria.
Parameter Existing Values Required Value
Turbidity (NTU) 30 < 5
Coliform Forming Units (CFU/100 ml) 10,000 < 10
Color (UC) 100 < 15
Ferric (mg/l) 7 < 1
Manganese (mg/l) 2 < 0.2

Technical Solution:

The following processes were carried out:

  • Pre filtration: 100 micron automatic back wash Arkal disc filtration system.
  • Oxidation of Fe, Mn and H2S: Lamela-Oxidation Process.
  • Media Filtration: Catalytic Media Filters – implementing AFM®.

Lamela-Oxidation-Reactor (L.O.R.) - installed

Lamela-Oxidation-Reactor (L.O.R.) - process

Water Cascade

AFM® Filters

Results:

Parameter Required Value Before treatment After treatment
Turbidity (NTU) 5 30 0.5
Coliform Forming Units (CFU/100 ml) 10 10,000 nil
Color (UC) 15 100 5
Ferric (mg/l) 1 7 0.3
Manganese (mg/l) 0.2 2 0.05

Dryden Aqua’s Deliverables: