Application of water treatment sludge in the manufacturing of lightweight aggregate

Characterization and pozzolanic properties of calcined alum sludge

“…The most feasible alternatives to solve the problem of sludge discharge including several reuse options were identified globally such as; for coagulant recovery and reuse [9], as coagulant in wastewater treatment [10], as adsorbent for phosphorus [11], manganese [12] and fluoride [13] from aqueous solutions, as coconditioning and dewatering with sewage sludge [14], as constructed wetlands substrate [15], as soil buffers [16], nutrients reduction in laden soils and runoffs [17], in brick making [18][19][20], in ceramic making [21,22], in pavement and geotechnical works [23], for structural soil improvement [24] and in manufacture of cement [25][26][27][28][29], cementitious materials [30][31][32][33][34][35][36], and light weight aggregate [37,38]. Replacement part of clay by sludge improves the compressive strength of produced cement paste.…”

Utilization of water treatment plant sludge in structural ceramics bricks

“…The sludge produced by WTP can be used like additive to produce high-alumina refractory ceramics, lightweight aggregate (LWA), Glassceramics, and finally as a prime material for clinker manufacture (Ferreira and Olhero, 2002;Huang and Wang, 2013;Toya et al, 2007;Husillos Rodríguez et al, 2011).…”

Review on Different Beneficial Ways of Applying Alum Sludge in a Sustainable Disposal Manner

“…Haung and Wang, [69] anticipated a method of manufacture light-weight aggregate from 10 different water treatment plant in Taiwan and with the method that was applied, they were able to produce a light weight aggregate which met the standard specification for light weight aggregate as required by ASTM C330. Different laboratory experiment was employed to achieve this result, which included two stages.…”