Sanitary Ware Waste as a Source for a Valuable Biodiesel Catalyst

Table 4

Chemical analysis of sanitary ware wastes compares with local gypsum ore and pure gypsum.

Item	Sanitary ware waste	Local ore	CaSO4.2H2O
Insol.	1.3%	0.2%	—
CaO	31.8%	32%	32.6
MgO	0.4%	0.6%	—
Free water	0.5%	0.3%	—
NaCl	0.2%	0.4%	—
SO3	43.7%	44%	46.5
CO2	1.5%	1.5%	—
Comb. water	21%	19.7%	20.9
Total	100.4%	98.7%	100%