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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 104503
Title Bacteriological studies on dairy waste activated sludge
show extra info.
door A.D. Adamse
Author(s) Adamse, A.D.
Publisher Wageningen : Veenman
Publication year 1966
Description 75 p ill
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Mulder, Prof. Dr. Ir. E.G.
Graduation date 1966-09-30
Dissertation no. 401
Author abstract show abstract
Dairy-waste activated sludge was examined for bacterial composition and response to different conditions. Strains isolated were classified mainly into three groups: predominantly coryneform bacteria (largely Arthrobacter), some Achromobacteraceae and a small groups of Pseudomonadaceae. Experiments with representative strains of the three groups confirmed the ultimate predominant position of Arthrobacter.

Two thirds of the bacteria gave a neutral reaction on Hugh and Leifson media, and more than half were not proteolytic. The activated sludge showed a ready accumulation of polysaccharides under certain nutritional conditions.

Dissimilation of the carbohydrate of the substrate started immediately after adding substrate to an aerated activated sludge suspension. This was demonstrated by a drop in pH, through accumulation of acid intermediates, and a sharp decrease of dissolved O 2 . Dissolved O 2 was estimated by a stirrer-cleaned oxygen electrode. When dissolved O 2 was still available, acetic acid accumulated; when O 2 was exhausted, lactic acid formed.

Dissimilation of the proteins usually started after the carbohydrate was exhausted and lasted longer. This meant that there may be an important discrepancy between the original and the actual C/N relation of the substrate.

Experiments with Sphaerotilus natans and Arthrobacter strains, and published data yielded an explanation of the mechanism of bulking of activated sludge.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,401
FORUM ; STACKS ; NN08202,401
Keyword(s) (cab) milk processing / waste water treatment / water treatment / biological treatment / parasitology / sewage effluent disposal / purification plants
Categories Manure treatment
Publication type PhD thesis
Language English
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