Program: Collaborative Research for Common Regional Issues (CRC)

Field: Civil Engineering

Principal Investigator: Assoc. Prof. Dr. SHREESHIVADASAN CHELLIAPAN

Sending University: Universiti Teknologi Malaysia (UTM)

Japanese Co-Investigator: Prof. Dr. Hiroshi TAKAHASHI

Japanese University: Tohoku University

Year: 2016


Significant quantities of metal bearing waste (for example nickel, copper, titanium and zinc) either in solid or liquid form is generated by the industrial activities such as automotive, printed circuit board and metal finishing sectors without recovery of the valuable materials from waste streams or landfill. Solid waste generally arises via the chemical treatment of outfall contaminated rinse waters which removes the contaminants from solution by conversion of the heavy metals into their insoluble hydroxide salts. These heavy metal hydroxides are precipitated and formed as a sludge-like mass with typical solids content of 3%; i.e. they contain some 97% water. The sludges thus formed may in turn be dewatered substantially within a filter press to form a more solid filter cake at some 30 “ 35% solids content for offsite disposal. An important factor in the potential uptake of the developed technology is considered to be the increasing value of metals, which is projected to continue to rise inexorably due to escalating world demand. As a result, there is an opportunity for significant cost benefit via metal recovery from waste which would otherwise be consigned to landfill. this project can contribute to solve the urban heat problem