Abstract:
:Dehydrogenase activity assay of activated sludge using the redox dye 2-(p-iodophenyl)-3-(p-nitrophenyl)-5-phenyltetrazolium chloride (INT) was investigated. INT-dehydrogenase activity (INT-DHA) was directly proportional to INT dosage and inversely proportional to bio-mass concentration over limited ranges. INT dosages exceeding 2.5m/M were toxic to dilute activated sludge suspensions. INT-DHA was greatest near pH 9, whereas the peak oxygen uptake rate (OUR) occurred at pH 8. Both INT-DHA and OUR varied inversely with sludge age, but INT-DHA was the more sensitive of the two parameters to this variable. Consistently good and highly significant correlations between INT-DHA and OUR of chlorine stressed activated sludge were found at sludge ages ranging 2.2-7.0 days.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Lopez JM,Koopman B,Bitton Gdoi
10.1002/bit.260280719subject
Has Abstractpub_date
1986-07-01 00:00:00pages
1080-5issue
7eissn
0006-3592issn
1097-0290journal_volume
28pub_type
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