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Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104177
Title Bacteriology of activated sludge
show extra info.
door H.W. van Gils
Author(s) Gils, H.W. van
Publisher Delft : W.D. Meinema
Publication year 1964
Description 101 p ill
Series title Report / Instituut voor Gezondheidstechniek T.N.O. (32)
Notes Proefschrift Wageningen
Tutors Mulder, Prof. Dr. Ir. E.G.
Graduation date 1964-06-29
Dissertation no. 370
Author abstract show abstract
The bacteriology and biochemistry of activated sludge grown in domestic waste water or fed with synthetic media were studied. The nature of the flocs was investigated by determining morphological and physiological characteristics of many strains isolated.

Predominant bacteria were Achromobacteraceae, further in sludge grown in domestic waste water Pseudomonadaceae and coryneform bacteria, and in sludge grown in waste water from synthetic media Micrococcaceae and large oval encapsulated coccoid bacteria.

Bacterial flocs were not formed readily by many of the strains tested in pure culture. Addition of FeCl 3 or CaCl 2 sometimes stimulated flocculation. Variation in C/N relation of the substrate had no effect.

Biochemical activities of activated sludge and of some strains in pure culture were studied in Warburg respirometers. Domestic activated sludge readily absorbed organic acids and ethanol, whereas sugars and polyalcohols were taken up slowly. The same held for pure cultures isolated from this sludge. Adaptation to sugar breakdown was-stimulated by N compounds and particularly by amino acids.

Dissimilation was 10-20 % for glucose and 30-40 % for acetate. Rate of uptake for glucose and O 2 , and dissimilation percentages were independent of substrate concentration, but proportional to sludge concentration. Almost 60 % of added glucose was stored as polysaccharides by glucose-adapted sludge when no N was supplied. When ammonium sulphate was added only 25 % of the glucose yielded polysaccharides. Endogenous respiration was higher, the higher the sludge load while addition of (NH 4 ) 2 S0 4 with the glucose caused a still higher endogenous respiration, presumably due to amino acid synthesis.

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On paper FORUM ; STACKS ; NN08202,370
FORUM ; STACKS ; NN08200,370
FORUM ; STACKS ; NN08202,370
Keyword(s) (cab) sewage sludge / sludges / disposal / slurries / processing / handling / parasitology / biology / wastes
Categories Waste treatment
Publication type PhD thesis
Language English
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