Waste water characteristics and treatment from land reclamation using incineration bottom ash

3^rd International Conference on Hydrology & Meteorology

September 15-16, 2014 Hyderabad International Convention Centre, India

Augustine Quek

Accepted Abstracts: Hydrol Current Res

Abstract :

Reclaiming land from the sea, or land reclamation, causes deviations in the local geochemical and hydrological cycles: Recent advances in technology has enabled waste materials, such as incineration bottom ash (IBA) and marine clay, to be used as land reclamation material, by binding the two together with additives, forming a solid matrix. Such matrices inevitably produce wastewaters during and after the land reclamation processes, potentially impacting the geological, geophysical, hydrological and biological environment. Results showed that while heavy metal concentrations within the matrix meets the Dutch criteria for industrial land use, the wastewaters produced during certain stages may not meet local wastewater discharge standards. The wastewaters produced during the construction stage contain heavy metals, whose concentrations could be controlled by the type construction methods employed. Wastewaters produced from leachates after land reclamation typically showed high concentrations only for one or two metals, selenium and copper. However, these wastewaters could be collected and treated easily, as confinement is part of the land reclamation processes. The use of polyaluminum chloride (PACl) or iron oxide (Fe2O3) could reduce heavy metal concentrations significantly, at different optimal dosages. pH reduction of the alkaline wastewaters could also be achieved through the addition of PACl. This presentation will discuss the potential impacts on the use of IBA in land reclamation, and how they can be mitigated.

Biography :

Augustine Quek obtained his PhD from the National University of Singapore, School of Civil and Environmental Engineering, before completing two and a half years of Postdoctoral studies at the same University. He was an Assistant Professor at Nottingham University, before assuming the position of R&D Project Manager at Chemilink Technologies, a specialty chemical company for the construction industry. He has published more than 11 papers in peer-reviewed, international journals, including three review papers on waste to resources.