Activated Sludge – 100 Years and Counting

Jenkins, David; Wanner, J.

doi:10.2166/9781780404943

Cited by 81 publications

(63 citation statements)

References 354 publications

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“…In 0-28 days, the activated sludge SVIs for the four systems were similar, changing in 58 mL/g-139 mL/g MLSS. The settleability of activated sludge in four systems were all changed from good to fair (Jenkins and Wanner 2014). On the 19th day, the activated sludge of the four systems exhibited slight bulking because of the change in influent, and the activated sludge SVIs changed to 124 (control), 143 (TCS), 139 (DCP), and 160 mL/g MLSS (THPS).…”

Section: Settlement Abilitymentioning

confidence: 99%

Evaluation of sludge reduction of three metabolic uncouplers in laboratory-scale anaerobic–anoxic–oxic process

Li²,

Jin

et al. 2016

Bioresource Technology

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Section: Settlement Abilitymentioning

confidence: 99%

Evaluation of sludge reduction of three metabolic uncouplers in laboratory-scale anaerobic–anoxic–oxic process

Li²,

Jin

et al. 2016

Bioresource Technology

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“…These advanced tools in combination with control algorithms allowed to optimize aeration process for nitrification purposes [18,19]. Direct measurement of nitrogen compounds concentration allows to precisely control biological nitrogen removal processes, which is commonly used in mainstream treatment (i.e.…”

Section: On-line Monitoring For Wastewater Treatmentmentioning

confidence: 99%

One-stage deammonification start-up control using ion-selective electrodes (ISE) sensor

Miodoński

Muszyński-Huhajło

2017

E3S Web Conf.

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Abstract. Dynamic development of side-stream ammonia-rich streams treatment technologies creates need of new methods of control techniques. So far, most of available technologies are based on relatively simple sensors, such as pH probes. This article presents the results of an ion selective electrode used for controlling a one-stage deammonification process in the start-up period. Sensor applicability under alternating aerobic/anaerobic conditions and large fluctuations of measured substances concentrations was investigated. ISE probe was also used to verify Anammox bacteria response on elevated dissolved oxygen exposition at the beginning of the anaerobic phases preceded by aerobic phases.

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“…There are two major inputs of phosphorus into surface waters-runoffs from agricultural areas and wastewater discharges. Conventional continuously aerated activated sludge systems, designed principally to eliminate organic matter [expressed as chemical oxygen demand (COD) or biological oxygen demand (BOD)], produce effluents with high residual phosphorus level, which do not meet stringent regulations for wastewater discharge (Jenkins and Wanner 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The candidate PAOs include 'Candidatus Accumulibacter phosphatis' (hereafter called Accumulibacter), Tetrasphaera-related organisms (Actinobacteria) and 'Candidatus Halomonas phosphatis' (hereafter called Halomonas) (Seviour and Nielsen 2010;Nguyen et al 2011Nguyen et al , 2012Jenkins and Wanner 2014). However, glycogen-accumulating organisms (GAOs) are also able to proliferate in EBPR systems.…”

Section: Introductionmentioning

confidence: 99%

“…GAOs take up anaerobically organics, but they use glycogen as source of energy, which results in deterioration of EBPR process. Two main groups of GAOs are alphaproteobacterial Defluviicoccus vanus-related bacteria and gammaproteobacterial 'Candidatus Competibacter phosphatis' (hereafter called Competibacter), both competing with PAO for substrates under anaerobic conditions (Seviour and Nielsen 2010;Jenkins and Wanner 2014).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effects of carbon/phosphorus ratio on polyphosphate- and glycogen-accumulating organisms in aerobic granular sludge

Muszyński

Miłobędzka

2015

Int. J. Environ. Sci. Technol.

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A laboratory-scale granular sequencing batch reactor, fed with acetate, was operated at two different ratios of chemical oxygen demand to phosphorus-15:1 and 100:1. Smaller aerobic granules, but with better settleability, were obtained at the lower ratio. High ratio of phosphorus release to uptake of dissolved organic carbon (0.42 mol/mol) coincided with high percentage of polyphosphate-accumulating organisms (up to 70 % of all bacteria) and implied high metabolic activity of these bacteria. Polyphosphate-accumulating organisms belonged mainly to Accumulibacter and Tetrasphaera (46 and 23 %, respectively). Despite significant abundance, Tetrasphaera-related microorganisms were not detected by oligoprobes Actino-221 and Actino-658, but by broader oligoprobes Tet2-892 and Tet3-654. Low abundance (1 %) of Halomonas phosphatis indicated a minor role of these bacteria in the laboratory-scale reactor fed with synthetic wastewater. When the ratio of chemical oxygen demand to phosphorus was increased to 100:1, deterioration of settling properties was observed, caused by growth of filamentous organisms from Thiothrix/021N group. The higher ratio favoured Competibacter and was selected against all groups of polyphosphate-accumulating organisms. However, a significant percentage (10 %) of polyphosphate-accumulating organisms in the granular sludge with concomitant low ratio of phosphorus release to the uptake of dissolved organic carbon (0.01 mol/mol) suggested shift in the overall population metabolism. Under phosphorus limitation in wastewater, polyphosphate-accumulating organisms no longer synthesized poly-P and behaved as glycogen-accumulating organisms.

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Activated Sludge – 100 Years and Counting

Cited by 81 publications

References 354 publications

Evaluation of sludge reduction of three metabolic uncouplers in laboratory-scale anaerobic–anoxic–oxic process

Evaluation of sludge reduction of three metabolic uncouplers in laboratory-scale anaerobic–anoxic–oxic process

One-stage deammonification start-up control using ion-selective electrodes (ISE) sensor

The effects of carbon/phosphorus ratio on polyphosphate- and glycogen-accumulating organisms in aerobic granular sludge

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