The filtrates or centrates from dewatering of digested sludges cause high internal nitrogen loads on sewage treatment plants. Especially at poor inflow C:N ratios separate treatment of these sludge liquors can significantly relieve the biological treatment stage. We developed a new process for a biological sidestream treatment with primary sludge as the carbon source for denitrification. The process has beeen tested in laboratory-scale tests and by computer simulations. The stability of the process is being investigated in a full-scale application under practical conditions.
Integrated sidestream treatment for enhanced enlargement of sewage plants
G. Kolisch, T. Rolfs; Integrated sidestream treatment for enhanced enlargement of sewage plants. Water Sci Technol 1 May 2000; 41 (9): 155–162. doi: https://doi.org/10.2166/wst.2000.0194
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