Ferric, Manganese and Latex removal for Chiquita banana packing plant

Company : Chiquita
Location : Panama
Year : 2003
Description : Supply clean water for a Banana Packing plant
Goal : Ferric, Manganese and Latex Removal from delaxing pools
Capacity : 40 m3/hr
Water Source: A private deep well

The Problems :

  • The plant’s well water contained Ferric and Manganese.
  • The incoming bananas oozed Latex from the cut.
  • The combination of the above turned the water color to purple and stained the bananas.
  • Water turbidity was above the maximum allowable level.
  • Water polluted with germs and fecal coliforms.
  • Wastewater were not recycled and created ecological problems downstream.

Technical Solution :

The following processes were carried out:

  • Side-stream circulation: Screen Filtration with automatic back wash.
  • Oxidation of Ferric, Manganese and Latex into a lamella reactor: Implementing Hydrogen Peroxide with redox control.
  • Coagulant dosing in order to agglomerate the oxidized fine particles into bigger flocs.
  • Media Filtration: Catalytic Media Filters – implementing AFM®.

Delaxing Pools

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

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

Exterior view of the Catalytic Media Filters

Results :

Parameter

Required Value

Before treatment

After treatment

Iron (mg/l)

< 1

1.5

0.3

Manganese (mg/l)

< 0.2

0.4

0

Color (color units)

< 10

500

10

COD (mg/l)

120

25

Turbidity (NTU)

< 10

150

2

Colony forming units CFU/100 ml

< 10

1,500

10

Appearance of delaxing pools

Minimize

Purple-black

Clear

Water saving (%)

Minimize

0

84%

Electricity saving (%)

Minimize

0

40%


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