Effect of sintering temperature on the characteristics of sludge ceramsite

Ceramsite obtained from water and wastewater sludge and its characteristics affected by Fe2O3, CaO, and MgO

“…From the results, it is clear that hydrated products formed at higher CaO contents are one of the first decomposed phases during the heating. There was little difference in DT-TG curves for the 3 mixtures above 300 • C. Weak weight loss for 3 mixtures were detected above 500 • C in TG analyses, which indicated that there was little volatilization of substances and the endothermic changes were caused by the oxidation of mostly inorganic substances and the transformation of crystalline phases [22].…”

“…Significant weight loss for the mixtures with MgO contents of 1.6%, 2%, and 4% occurred within the temperature ranges of 243.5-526, 241.6-501.6, and 239.5-541.1 • C, respectively. The detected weight loss in the above temperature ranges were caused by the evaporation of water and decomposition of carbonous materials [22].…”

“…These applied ways of WWTS are pyrolysis for carbon or adsorbents [11][12][13][14][15][16][17], compressing into building blocks [18][19][20], and sintering for production of ceramsite [21][22][23]. The resulting ceramsite made with WWTS and clay has been proposed to be used as construction materials [21,22], because heavy metals are properly stabilized in ceramsite and cannot be easily released into the envi- ronment again to cause secondary pollution [23]. But, the suitable natural materials (clay) for ceramsite production are exhausting in earth.…”

Preparation and characterization of ceramsite from lime mud and coal fly ash

“…These components are useful for construction materials, i.e. bricks, fine aggregate in mortars and ceramic materials or filter media in reactors for treating municipal and industrial wastewater [21,22]. Conversion of industrial waste lime mud into ceramsite should be promoted as an achievement for suitable waste disposal option.…”

A research on ceramsite obtained from blast furnace slag and sewage sludge

“…SS or SS plus other solid wastes can also be used as sorbent or biosorbent on heavy metal (Rozada et al, 2008), phenol (Usarat and Kesinee, 2007) and dyeing pollution (Rozada et al, 2007). According to its characteristics including organic matter, containing high fertility, the general application of SS is as additive to the different soils, such as turgrass (Hefa et al, 2007) and agriculture (Dai et al, 2009;Carbonell et al, 2006).The same as BFS, SS also can be used to produce ceramsite (Xu et al, 2008(Xu et al, , 2010 or combined with others waste, for example, fly ash (González-Corrochano et al, 2009), coal ash (Xingrun et al, 2009), discarded tyres (Rozada et al, 2007) to manufacture lightweight aggregate or as packing in fixed-bed system. The objective of this study was to examine the feasibility of ceramsite produced from blast furnace slag and sewage sludge at different sintering technology and mass ratios (BFS: SS: clay).…”