Case Study-Herreruela & Carcaboso – Caceres

Objective:Supply of drinking water treatment system to the cities of Herreruela and Carcaboso in the province of Caceres, Spain



Project ID

Company Herreruela & Carcaboso
Location Spain
Year 2011-2012
Description Supply of drinking water treatment system to the cities of Herreruela and Carcaboso in the province of Caceres, Spain
Goal Reduce arsenic and iron levels
Capacity Herreruela: 200 m3 /day
Carcaboso: 400 m3/day
Water Source Tube Wells

The Problems:

The drinking water contained high levels of Arsenic and Iron above drinking water limits standards.

Herreruela Parameter Existing Value Required Value
Turbidity (NTU) 5 <1
Arsenic (ug/l) 45 <10
Iron (mg/l) 4.48 <0.2
Herreruela Parameter Existing Value Required Value
Turbidity (NTU) 5 <1
Arsenic (ug/l) 45 <10
Iron (mg/l) 4.48 <0.2

Technical Solution:

The following processes were carried out:
  • Aeration and Oxidation (detention time of 30-60 minutes) using air diffusers in order to blow off VOC’s and raise the redox potential to >100 mv.
  • MagpHlow dozing into the aeration tank in order to raise pH levels to 8.0-8.3.
  • Coagulant dozing of APF into the aeration tank.
  • AFM® filtration.
  • Chlorine dozing.

Full scale plant

Results

Herreruela Parameter Required Value Before Treatment After Treatment
Turbidity (NTU) <1 5 <0.5
Arsenic (ug/l) <10 45 <10
Iron (mg/l) <0.2 4.48 <0.14

Carcaboso Parameter Required Value Before Treatment After Treatment
Turbidity (NTU) <1 5 <0.3
Arsenic (ug/l) <10 11 <3
Iron (mg/l) <0.2 2.3 <0.12

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