An internal carbon source for improving biological nutrient removal

Enhancing denitrification using a carbon supplement generated from the wet oxidation of waste activated sludge

“…Pure carbon sources such as ethanol (Mokhayeri et al, 2008), methanol (Foglar and Briški, 2003), acetate (Isaacs and Henze, 1995;Kampas et al, 2009;Mokhayeri et al, 2008) and VFA mixtures (Fass et al, 1994) have increased denitrification rates, but it is very important to find an economical carbon source and minimise sludge production, as the carbon source and solid waste management costs are responsible for the majority of the total costs of treated wastewater (MacDonald, 1990).…”

Feedforward control for nitrogen removal in a pilot-scale anaerobic-anoxic-oxic plant for municipal wastewater treatment

“…Considering that the hourly fluctuation of inlet flow was regular in many municipal WWTPs [7][8][9] and that the influent nitrogen and chemical oxygen demand (COD) concentration played important roles in nitrogen removal [10,11], a series of experiments were carried out to investigate the impact of inlet flow, influent nitrogen, and COD concentrations on the pilot-plant. Feedforward strategies were then established based on the experiment results.…”

Phosphorus Release from Sediments in a Riparian <i>Phragmites australis</i> Community at the Estuary of the Chikugogawa River, Western Japan

“…PO  Phosphorus mobilization in anaerobic sediments has been shown by experimental condition. The anaerobic reaction of biodegradation or novel fermentation processes using municipal sludge release mobilized phosphorus [17,18], however, release of inorganic phosphorus is inhibited by the presence of nitrate [19]. Similar to the anaerobic process of biodegradation, incubation of river or lake sediment produces phosphate ion under anaerobic condition [15,[19][20][21].…”