Nitrification monitoring in activated sludge by oxygen uptake rate (OUR) measurements

Surmacz-Górska, Joanna; Gernaey, Krist V.; Demuynck, Carl; Vanrolleghem, Peter A.; Verstraete, Willy

doi:10.1016/0043-1354(95)00280-4

Cited by 184 publications

(93 citation statements)

References 12 publications

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“…Furthermore, OUR can provide much information concerning the treatment plant's performance, wastewater characteristics, the degradability of special concentrated streams as well as the parameters needed to predict possible optimizations of a treatment plant. The OUR measurements proved that the oxygen-depletion bioprocesses in mixed liquor are a necessary but not sufficient condition for nitrification [31]. Figure 4 shows the respirograms of mixed liquor with the addition of R. capsulatus as the inoculum, both in AE-DK and AN-LT growth conditions.…”

Section: Nur and Ourmentioning

confidence: 99%

Potential of Rhodobacter capsulatus Grown in Anaerobic-Light or Aerobic-Dark Conditions as Bioremediation Agent for Biological Wastewater Treatments

Costa

Ganzerli²,

Rugiero

et al. 2017

Water

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Abstract:The use of microorganisms to clean up wastewater provides a cheaper alternative to the conventional treatment plant. The efficiency of this method can be improved by the choice of microorganism with the potential of removing contaminants. One such group is photosynthetic bacteria. Rhodobacter capsulatus is a purple non-sulfur bacterium (PNSB) found to be capable of different metabolic activities depending on the environmental conditions. Cell growth in different media and conditions was tested, obtaining a concentration of about 10 8 CFU/mL under aerobic-dark and 10 9 CFU/mL under anaerobic-light conditions. The biomass was then used as a bioremediation agent for denitrification and nitrification of municipal wastewater to evaluate the potential to be employed as an additive in biological wastewater treatment. Inoculating a sample of mixed liquor withdrawn from the municipal wastewater treatment plant with R. capsulatus grown in aerobic-dark and anaerobic-light conditions caused a significant decrease of N-NO 3 (>95%), N-NH 3 (70%) and SCOD (soluble chemical oxygen demand) (>69%), independent of the growth conditions. A preliminary evaluation of costs indicated that R. capsulatus grown in aerobic-dark conditions could be more convenient for industrial application.

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Section: Nur and Ourmentioning

confidence: 99%

Potential of Rhodobacter capsulatus Grown in Anaerobic-Light or Aerobic-Dark Conditions as Bioremediation Agent for Biological Wastewater Treatments

Costa

Ganzerli²,

Rugiero

et al. 2017

Water

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“…Azide (50% at 0.3 µM in vivo) has been shown to be a strong selective inhibitor of nitrite oxidation (Ginestet et al 1998). Chlorate (20 mM) has been used to stop nitrite oxidation in activated sludge systems (Surmacz-Gorska et al 1996). In tests with gold-mine service water, it was shown that chlorine (3-13 mg L −1 ), chlorine dioxide (2-8 mg L −1 ), bromine (>8 mg L −1 ) and cyanide (>2 mg L −1 ) caused selective inhibition of the nitritation (Jooste & Vanleeuwen 1993).…”

Section: Inhibitory Compoundsmentioning

confidence: 99%

Origin, causes and effects of increased nitrite concentrations in aquatic environments

Philips

Laanbroek

Verstraete

2002

Rev Environ Sci Biotechnol

Self Cite

312

198

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Literature frequently mentions increased nitrite concentrations along with its inhibitory effect towards bacteria and aquatic life. Nitrite accumulation has been studied for decades, and although numerous causal factors have already been commented on in literature, the mechanism of nitrite accumulation is not always clear. From the broad range of parameters and environmental factors reviewed in this paper, it is obvious that the causes and consequences of nitrite accumulation are not yet completely understood. Among others, pH, dissolved oxygen, volatile fatty acids, phosphate and reactor operation have been found to play a role in nitrite accumulation, which results from differential inhibition or disruption of the linkage of the different steps in both nitrification and denitrification. In the case of nitrification, this differential inhibition could lead to the displacement or unlinking of the ammonia oxidisers and nitrite oxidisers. In this paper, the idea is formulated that the nitrifier population forms a role model for the total microbial community. Increased nitrite concentrations would in this aspect not only signal a disruption of nitrifiers, but possibly also of the total configuration of the microbial community.Abbreviations: AMO -Ammonia mono-oxygenase; Anammox -Anaerobic ammonium oxidation; AOBAmmonia-oxidising bacteria; ATP -Adenosine triphosphate; COD -Chemical oxygen demand; DNRA -Dissimilatory nitrate reduction to ammonium; DO -Dissolved oxygen; EU -European union; FA -Free ammonia; F/M -Food to micro-organism ratio; FNA -Free nitrous acid; HAO -Hydroxylamine oxidoreductase; HRTHydraulic residence time; NDBEPR -Enhanced biological phosphate removal with nitrification and denitrification; NO -Nitric oxide; NOB -Nitrite-oxidising bacteria; NOR -Nitrite oxidoreductase; OLAND -Oxygen limited autotrophic nitrification denitrification; RBC -Rotating biological contactor; Sharon -Single reactor high activity ammonia removal over nitrite; SRT -Sludge residence time; TAN -Total ammoniacal nitrogen; TOC -Total organic carbon; VAS -Volatile attached solids

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“…The method of grasping riverbed activity from oxygen uptake rate is well known as a highly repeatable and easy to measure method for estimating biofilm activity (Hanes and Irvine, 1968). Moreover, it is possible to separate a specific microbial activity and quantify it by adding an inhibitor (Surmacz-Gorska et al, 1996). While O P /O R was 0.69 in average for the case of brick-filled channel, it turned out to be 0.10 in average for the gravel-filled channel, which means that oxygen uptake accompanying degradation is remarkable compared with the primary production in the gravel-filled channel.…”

Section: Resultsmentioning

confidence: 99%

Influence of Streamside Surface Area on Aquatic Biota and Biofilm Activity

Hiratsuka

Kim

Tanaka

et al. 2003

J. of Wat. & Envir. Tech.

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In this study, fillers (gravel and brick) of different surface areas were installed on both banks of two test channels so as to have the same capacity, and effects of differences in surface area and porosity of the streamside on aquatic biota and activity of the attached biofilm were investigated at downstream distance. The results showed that an increase in surface area and porosity causes change in the composition of microbial community, increasing the number of total bacteria and nitrifying bacteria and improving oxygen uptake activity. Although there was no evident difference found in the biofilm microfauna between the two test channels, a result was obtained that oxygen uptake rate by protozoa and metazoa evaluated by laboratory batch experiments quadruples farther downstream in the gravel-filled channel. Furthermore, it was clear, from the result that there observed many Physidae and Ephemeroptera that prey on deposits such as detritus precipitated in the interstices, that the amount and diversity of macrobenthos increased in the gravel-filled channel. These results suggest that surface area and porosity are extremely important factors in the detritus food chain constructed by settling and accumulation of particulate organic matter, and it is considered that controlling them can create a diverse aquatic biota.

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Nitrification monitoring in activated sludge by oxygen uptake rate (OUR) measurements

Cited by 184 publications

References 12 publications

Potential of Rhodobacter capsulatus Grown in Anaerobic-Light or Aerobic-Dark Conditions as Bioremediation Agent for Biological Wastewater Treatments

Potential of Rhodobacter capsulatus Grown in Anaerobic-Light or Aerobic-Dark Conditions as Bioremediation Agent for Biological Wastewater Treatments

Origin, causes and effects of increased nitrite concentrations in aquatic environments

Influence of Streamside Surface Area on Aquatic Biota and Biofilm Activity

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