Case Study-Municipal-Wastewater-Tertiary-Treatment

Objective: Reduce BOD, TSS and Turbidity


Location Middle East
Year 2006
Description Effluent Tertiary Treatment after biological treatment plant for Unlimited Irrigation
Goal Reduce BOD, TSS and Turbidity
Capacity 23 m3/hour
Water Source Secondary Effluent

The Problems:

  • The plant produces between 400-500 m³ of waste water per day and sends for irrigating a nearbywild area.
  • The run-off water from such unlimited irrigation affects the environment.
  • According the Department of Health and Environment, water for unlimited irrigation must go through tertiary treatment process to achieve required water quality standards.
Parameter Existing Value Required Value
Turbidity (NTU) 50 <3
BOD (PPM) 30 <10
TSS (PPM) 30 <10

Technical Solution:

  • Oxidation with sodium hypochlorite to reduce the organic load and disinfect the system.
  • Pre-filtration with Arkal Spin Klin unit , OPAL 3×2”, 130 μ.
  • AFM® – Catalytic Media filtration with coagulation.
  • Final disinfection with sodium hypochlorite , including ½ hr detention time.

Results

Parameter Existing Value Required Value After Treatment
Turbidity (NTU) 3 50 2
BOD (PPM) 10 30 2
TSS (PPM) 10 30 10

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  • The system is completely automatic with a minimum of maintenance.
  • The system was certified for unlimited irrigation
  • The customer saves expensive potable water for irrigation and can irrigate the surrounding gardens with the treated water