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Investigation into excess activated sludge accumulation at low temperatures


, : Investigation into excess activated sludge accumulation at low temperatures. Water Research Oxford 28(3): 501-509

The effect of low-temperature (8 and 20 degrees C) operation of the activated sludge process on the volatile suspended solids yield was investigated at laboratory scale using two parallel 4-litre sequencing batch reactors operating at a sludge retention time of ~ 10 d and a hydraulic retention time of ~ 1.25 d. The observed yield of volatile suspended solids increased at lower temperatures for two levels of influent suspended solids (~ 15 and 70 mg/litre).

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Other references

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Ebrahimzadeh, H.T.righi, G., 1979: Neoformation of roots and vegetative and floral buds on segments of the flower stalk of the Nicotiana tabacum cultivar Basma S. 31 cultivated in vitro. Canadian journal of botany, 57(10): 1187-1188

Makarova, I. V., 1976: New data on the morphology of some species of the genus thalassiosira from the pacific ocean studied by transmission electron microscopy. Concise data on the extent of knowledge about diatomous algae shells as studied in EM are presented, and the basic characters of transmission and scanning microscopies (TEM and SEM) are given. The use of TEM enabled the author to contribute to the...

Prigent, A., 1989: Artificial insemination in Italy and Germany. In the 1st of the 3 sections of this paper, rabbit ejaculate volume, numbers of spermatozoa (x 106) per ml and per ejaculate, and sperm motility during spring, summer, autumn and winter are tabulated for 2 breeding stations. Yearly averages for th...

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Shan YuLi; Liu KeHui, 2000: Knowledge economy and agricultural modernization in China. An overview of modern agriculture in China is presented. Ways in which agriculture could be further improved are suggested. Synchronization of agricultural modernization, rural industrialization, rural urbanization, farmer learning and training, a...

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