Abstract
Elutriation is described by Wang (1) as “A process of sludge conditioning whereby a sludge is washed either by fresh water or plant effluent, to reduce the sludge alkalinity and fine particles, thus decreasing the amount of required coagulant in further treatment steps, or in sludge dewatering,” as shown in Fig. 1. Elutriation is the term commonly used to refer to the washing of anaerobically digested sludge before vacuum filtration, as shown in Fig. 2. Washing causes a dilution of the bicarbonate alkalinity in the sludge and therefore reduces the demand for acidic metal salt by as much as 50% (2)–(14).
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Wang, L.K., Chang, SY., Hung, YT., Chen, J.P. (2007). Elutriation and Polymer Conditioning. In: Wang, L.K., Shammas, N.K., Hung, YT. (eds) Biosolids Treatment Processes. Handbook of Environmental Engineering, vol 6. Humana Press. https://doi.org/10.1007/978-1-59259-996-7_12
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DOI: https://doi.org/10.1007/978-1-59259-996-7_12
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