Sewage Treatment at "HUDIARA DRAIN" by Floating Wetlands (500 M) (UNICEF)

Project Area: Lahore (HUDIARA DRAIN)
Duration: 03 Months (Oct 2025 – Dec 2025)
Project Cost: PKR 30.3 Million
Drain Length: 500 m (1,640 ft) stretch
Installation of Floating Wetlands: 11 Beds (Each 24' x 100')
Installation of Aerators: 05 x
Solarization for the aerators: University of Lahore (UOL)

Objectives

  • Reduction of bad smell from the drain
  • Reduction of production of hydrogen disulphide (H2S) and methane (CH4)
  • Transform the drain’s banks into landscaped green belts with walking trails
  • BOD and COD reduction up to 30-35%
  • Reduction in mosquito breeding by improving water flow and reducing stagnant pools

SCOPE OF WORK

  • Install RCC columns and anchoring systems on both sides of drain to prevent drifting of floating wetlands and aerators.
  • Installation of a 08 x floating wetlands (100’ x 24’ with roots upto 6’ depth) with indigenous plants including Phragmites australis (common reed), Typha domingensis (dib), and Cana indica (aqiq).
  • The roots of the plants act as biofilter, clean the water by filtration, adsorption, absorption, provide the oxygen, and shoots provide habitat for birds)
  • Installation of 06 aerators to provide oxygen for aerobic bacteria to grow and decompose organic matter
  • Solarization works for the aerators (by the UOL)

Ponds-Before-after

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layout-Hudiara drian