Estimation of nitrification capacity of rock media trickling filters in external nitrification BNR
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Estimation of nitrification capacity of rock media trickling filters in external nitrification BNR
In the external nitrification (EN) biological nutrient removal (BNR) activated sludge (AS) system, the nitrification process is removed from the BNR activated sludge system and performed ‘externally’ on an integrated nitrifying trickling filter (NTF). As such, optimum design and operation of the NTF is essential for reliable performance of the ENBNRAS system. Although information on the design ...
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A biological nutrient removal (BNR) activated sludge (AS) scheme incorporating external nitrification in a fixed media system is evaluated. A laboratory scale investigation of the scheme indicates that it holds considerable potential for BNRAS system intensification through major reduction in sludge age and oxygen demand and significant improvement in sludge settleability. Because the BNRAS sys...
متن کاملBiochemistry of nitrification in soil.
Schloessing, J. H. & Muntz, C. A. (1877). C.R. Acad. Sci., Paris, 84, 301; 85, 1018. Schloessing, J. H. & Muntz, C. A. (1878). C.R. Acad. Sci., Paris, 86, 892. Schloessing, J. H. & Muntz, C. A. (1879). C.R. Acad. Sci., Paris, 89, 1075. Snell, F. D. & Snell, C. T. (1936). Colorimetric Methods of Analysis, p. 623. London: Chapman and Hall. Stevens, F. L. & Withers, W. A. (1909). Zbl.'Bakt. II, 23...
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Urethanes have marked physiological activity in plants and animals. Lefevre (1939) found that phenyl urethane affects wheat germination, and subsequently Templeman and Sexton (1946) showed that a variety of urethanes suppress the germination of wheat and oats without affecting charlock. The most active urethanes (for example, isopropylphenylcarbamate;ethylphenylcarbamate) are effective at a con...
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Marshall, K. C. (Cornell University, Ithaca, N. Y.) and M. Alexander. Nitrification by Aspergillus flavus. J. Bacteriol. 83:572-578. 1962.-Aspergillus flavus has been shown to produce bound hydroxylamine, nitrite, and nitrate when grown in peptone, amino acid, or buffered ammonium media. Free hydroxylamine was not detected in these cultures, but it was found in an unbuffered ammonium medium in ...
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ژورنال
عنوان ژورنال: Water SA
سال: 2009
ISSN: 0378-4738
DOI: 10.4314/wsa.v32i5.47830