The addition of iron (III) hydroxide during methanogenic digestion of activated sludge by anaerobic sludge displaying an iron-reducing activity resulted in a microbial reduction of iron (III) with the formation of iron (II), capable of precipitating phosphates. The feasibility of eliminating 66.6 to 99.6% of the dissolved phosphate at initial concentrations of 1000 to 3500 mg PO 43-/l by adding 6420 mg/l iron (III) hydroxide into a reactor for anaerobic fermentation of activated sludge was analyzed. The optimal ratio of iron (III) added to dissolved phosphate removed (mg) providing a 95% removal amounted to 2:1. These results may be used in new technology for anaerobic wastewater treatment with phosphate removal.
CITATION STYLE
Stabnikov, V. P., Tay, S. T. L., Tay, D. K., & Ivanov, V. N. (2004). Effect of iron hydroxide on phosphate removal during anaerobic digestion of activated sludge. Applied Biochemistry and Microbiology, 40(4), 376–380. https://doi.org/10.1023/B:ABIM.0000033914.52026.e5
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