Techno Press
Techno Press

Advances in Environmental Research   Volume 5, Number 3, September 2016, pages 169-178
DOI: http://dx.doi.org/10.12989/aer.2016.5.3.169
 
Anaerobic-aerobic granular system for high-strength wastewater treatment in lagoons
Rania A. Hamza, Oliver T. Iorhemen and Joo H. Tay

 
Abstract     [Full Text]
    This study aimed at determining the treatability of high-strength wastewater (chemical oxygen demand, COD>4000 mg/L) using combined anaerobic-aerobic granular sludge in lagoon systems. The lagoon systems were simulated in laboratory-scale aerated and non-aerated batch processes inoculated with dried granular microorganisms at a dose of 0.4 g/L. In the anaerobic batch, a removal efficiency of 25% was not attained until the 12th day. It took 14 days of aerobic operation to achieve sCOD removal efficiency of 94% at COD:N:P of 100:4:1. The best removal efficiency of sCOD (96%) was achieved in the sequential anaerobic-aerobic batch of 12 days and 2 days, respectively at COD:N:P ratio of 200:4:1. Sequential anaerobic-aerobic treatment can achieve efficient and cost effective treatment for high-strength wastewater in lagoon systems.
 
Key Words
    biological wastewater treatment; dried granular microorganisms; high-strength wastewater; lagoon systems; sequential anaerobic-aerobic treatment
 
Address
Department of Civil Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2019 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: technop@chol.com