Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 361277
Title Effect of Na+ and Ca2+ on the aggregation properties of sieved anaerobic granular sludge
Author(s) Pevere, A.; Guibaud, G.; Hullebusch, E.D. van; Boughzala, W.; Lens, P.N.L.
Source Colloids and Surfaces. A: Physicochemical and Engineering Aspects 306 (2007)1-3. - ISSN 0927-7757 - p. 142 - 149.
Department(s) Sub-department of Environmental Technology
Publication type Refereed Article in a scientific journal
Publication year 2007
Keyword(s) sequencing batch reactor - waste-water treatment - rheological properties - activated-sludge - uasb reactors - sequential extraction - molecular-mechanism - calcium - sewage - suspensions
Abstract Interactions between fine particles (0¿50 ¿m) of anaerobic granular sludge were investigated by studying the effect of Na+ or Ca2+ supply on the evolution of the zeta potential and viscosity of granular sludge suspensions. In the Na+ or Ca2+ concentration range investigated, the Na+ addition affected only slightly the evolution of the viscosity of fine particles of an anaerobic granular suspension. In contrast, Ca2+ addition strongly modified the evolution of the viscosity of the studied anaerobic granular sludge suspension. The use of rheology combined with zeta potential measurements clearly described the physico-chemical interactions between small anaerobic granules and especially the importance of aggregation phenomena that occur between fine anaerobic particles under Ca2+ addition. The positive effect of Ca2+ on the aggregation of non-fed fine anaerobic granular sludge is likely to induce the formation of bigger particles and thus, prevent their wash-out from anaerobic bioreactors.
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