Removal of ammonia from tannery effluents in a reed bed constructed wetland


Kucuk O., Sengul F., Kapdan I.

WATER SCIENCE AND TECHNOLOGY, vol.48, pp.179-186, 2003 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 48
  • Publication Date: 2003
  • Journal Name: WATER SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.179-186
  • Keywords: ammonia removal, constructed wetland, horizontal subsurface flow, reed bed, tannery effluent, LANDFILL LEACHATE
  • Dokuz Eylül University Affiliated: No

Abstract

A horizontal subsurface flow reed bed, Pragmites australis, constructed wetland system was operated continuously for one year at 5 different hydraulic retention times between 5 days-11 days with real tannery industry effluent to investigate mainly NH4-N and COD removal performance of the system. The bed was also operated at different initial NH4-N concentrations between 10-30 mg/L by adding NH4Cl into the tannery effluent. The results indicated that ammonia-nitrogen removal is significantly affected by hydraulic retention time while COD is not. The optimum HRT was determined as 8 days with over 95% NH4-N and around 30% COD removal efficiency. The system shows higher removal performance at high initial NH4-N concentrations. Almost complete (99%) NH4-N removal and over 40% COD removal was obtained at (NH4-N)(0) = 20 mg/L and HIRT = 7 days. PO4-P and total chromium removal were not significantly affected by operating conditions.