Enhanced Biological Phosphorus Removal in Activated Sludge Systems

Antibody recognition of an 18 kDa protein possibly involved in phosphate removal by activated sludge

“…Samples were taken from the second anoxic and the aerobic zones of a stable laboratory scale activated sludge system of the modified UCT (University of Cape town) configuration (Toerien et al, 1990). This system had an anaerobic zone followed by two, i.e.…”

Characterization of two phosphate transport systems in Acinetobacter johnsonii 210A

“…Under anaerobic conditions, polyP is degraded again and Pi is released via the low-affinity secondary transport system. Enhanced biological phosphorus removal from domestic wastewaters in full-scale activated-sludge plants is currently perceived to hinge on the provision of alternate stages in which the activated sludge is subjected to anaerobic and aerobic conditions (40). A characteristic feature of such plants is that Pi, after being released from the biomass in an anaerobic stage, is reincorporated in the biomass during aeration, together with part or all of the influent Pi (16).…”

Wastewater Protozoan-Driven Environmental Processes for the Protection of Water Resources

“…The polyphosphate is accumulated in the sludge, accompanied by potassium and magnesium accumulation. Magnesium and potassium are therefore known to be essential to enhanced phosphate removal (Toerien et al, 1990;Momba % Cloete, 1996). Sludge age is also an important factor in the removal of phosphate, because the time that the microorganisms are given to break down the waste products has a significant effect on effluent quality.…”

“…Sufficient time must be permitted for microorganisms to be in contact with the waste to accomplish the treatment. A sludge age ranging from 15 to 20 days is therefore required for the removal of phosphate in activated sludge systems (Toerien, 1990). Previous investigators have also shown the role of carbon sources in nutrient removal from wastewater (Kargi et al, 2005;Akpor et al, 2008).…”