Fish Processing Plant


Product:         Geotube® Dewatering Technology

Application:   Aquaculture

Location:       Chile


The Challenge:

A Chilean fish processing plant wanted to develop a cost-efficient method of managing its waste products.

The Solution:

Geotube® dewatering technology was used by the owner to take the blood water (mixture including blood, fish parts, and lipids) from the processing plant and dewater it with Geotube® containers [photo 2].

The fish processing waste material flowed from the plant to an elevated drum filter where the initial separation took place.  The solids dropped out over a gravity flow separator.  Liquid waste flowed into a homogenization tank [photo 3].  Next the pH was tested and adjusted with caustic soda as needed.  Then conditioner was added to the homogenization tank [photo 4]. A control system was used to measure and apply the correct dosages.  Polymer was injected into the feedline as it passed through a mixing chamber en route to the Geotube® containers [photo 5].

The Results:

The Geotube® dewatering process yielded clear effluent.  [Photo 6 shows the transition from raw waste (on left), to conditioner step (in middle), to polymer step (on right.)  Photo 7 presents the dewatered effluent after one hour.]

After the Geotube® dewatering on the blood water, the test results revealed the following:

  • Solids Removal:               97%
  • BOD Reduction:                80%
  • Nitrogen Capture:             92%
  • Oils and Fats Removal:   97%