Treatment of the most challenging type of industrial wastewater, collected from over 20 huge leather factory with high amount of COD and heavy metal like CrIII and CrVI in order to reuse for irrigation proposes. Meet the requirement of IEPO standards in wastewater reuse by tacking advantage from customized process and optimized arrangement of biological treatment units including UABR, UAFB, MBBR and EAAS.

Owner / Client / Consultant:

Khorasan Razavi Industrial Zones Company KRIZ Co./ Charmshar Industrial Zone / Pars Arian Ab Consulting Engineers Co.

Location / Completion Year / Duration:

Mashhad – Khorasan Razavi Province – Iran / 2019 / 24 month

Contract Type:

PC (Procurement and Construction)

Represented Solution and Services in This Project:

Main Solution:

  • Industrial Wastewater Treatment & Reuse (Irrigation Propose)

Supplementary Services:

  • Hydraulic Structure / Concrete tanks and Clarifiers
  • Electrical and Automation done with Absun Madar Eng. Co.

Employed Process Unit:

  • Screening & Filtration (Coarse Screen + Fine Screen + Rotary Drum Filter)
  • UABR (Up-Flow Anaerobic Baffled Reactor)
  • Sulfur Reduction Unit
  • UAFB (Up Flow Anaerobic Sludge Blanket)
  • MBBR (Moving Bed Bioreactors)
  • EAAS (Extended Aeration Activated Sludge)
  • Sludge Thickener + Stabilization unit + Dewatering Unit (Decanter Centrifugal)

Fluid Characteristic:

  Feed Product
Ind. Wastewater Irrigation Water
Flow Rate 3000 m³/day 3000 m³/day
BOD5 4000 mg/L < 100 mg/L
COD 8000 mg/L < 200 mg/L
TSS 2000 mg/L < 60 mg/L