Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge

Table 1

Inorganic materials in alum sludge.

Constituent	Weight percent
Aluminum	3.38%
Iron	0.819%
Manganese	0.16%
Chromium	0.013%
Vanadium	0.002%
Zinc	0.0098%
Lead	0.0001%
Barium	0.0001%
Arsenic	0.0002%