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Influence of metronidazole on activated sludge activity
Environmental Technology, 2020Metronidazole is potentially carcinogenic to humans and it has been detected in wastewaters. The Wastewater Treatment Plants using biological processes have been highly impacted by the emergent compounds of recalcitrant type, and the knowledge about that issue is quite relevant.
Oscar Velasco-Garduño +3 more
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1968
Publisher Summary This chapter focuses on the concept of bulking of activated sludge. Bulking sludge is a sludge, which settles slowly and compacts poorly, leaving a small amount of clear supernatant. The sludge particles of a bulking sludge appear to be similar to normal sludge except that the filaments extending from the clumps are much more ...
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Publisher Summary This chapter focuses on the concept of bulking of activated sludge. Bulking sludge is a sludge, which settles slowly and compacts poorly, leaving a small amount of clear supernatant. The sludge particles of a bulking sludge appear to be similar to normal sludge except that the filaments extending from the clumps are much more ...
openaire +2 more sources
On the controllability of activated sludge plants
2020 European Control Conference (ECC), 2020In this work, the full-state controllability properties of a biological wastewater treatment plant are analysed. Specifically, the five biological reactors in the Benchmark Simulation Model no. 1 are studied. For the task, we represented the activated sludge plant as a dynamical system consisting of 65 states, 7 controls and 27 disturbances as a ...
Neto, Otacilio B.L. +3 more
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Journal of Hazardous Materials, 2004
The effects of Ni(II) in a synthetic wastewater on the activity of activated sludge microorganisms and sequencing batch reactor (SBR) treatment process were investigated. Two parallel lab-scale SBR systems were operated. One was used as a control unit, while the other received Ni(II) concentrations equal to 5 and 10 mg/l.
Soon-An, Ong +3 more
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The effects of Ni(II) in a synthetic wastewater on the activity of activated sludge microorganisms and sequencing batch reactor (SBR) treatment process were investigated. Two parallel lab-scale SBR systems were operated. One was used as a control unit, while the other received Ni(II) concentrations equal to 5 and 10 mg/l.
Soon-An, Ong +3 more
openaire +2 more sources
The occurrence of fungi in activated sludge
Mycopathologia et Mycologia Applicata, 1970The population of a biological system in a sewage treatment plant is formed of a fortuitous assemblage of microorganisms, members of which are continually dropped out while additional members are recruited. Many of these organisms are active throughout the year. Fewer yeasts than filamentous fungi are found by the plating technique.
W B, Cooke, W O, Pipes
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Activity of preserved anaerobic sludge
Journal of Environmental Science and Health, Part A, 2019There is a need for a broad study addressing different preservation conditions of anaerobic sludge and its activity after a prolonged storage. This study compared four different preservation methods of mesophilic anaerobic sludge for a period of up to 12 months: storage at 23 ± 2 °C, +4 °C, ‒20 °C, and freeze-dried.
Anna Doloman +2 more
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The Activated Sludge Biomolecular Database
Water Environment Research, 2002Tremendous advances have recently been made in the development of molecular tools for analysis of microbial populations in the environment. However, an appropriate scientific basis for quantification of new molecular data must exist to effectively use these tools toward increased understanding of complex waste treatment environments and implementation ...
C A, Lajoie, G S, Sayler, C J, Kelly
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Structure of activated sludge floes
Biotechnology and Bioengineering, 1990AbstractRelatively large activated sludge floes (larger than about 100 μm) were stabilized, using a histological tissue specimen preparation procedure, and then were sliced into sections of 3 to 6 μm thick. The study of these sections, after staining, revealed the internal structure of the activated sludge floes.
D H, Li, J J, Ganczarczyk
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PHA production by activated sludge
International Journal of Biological Macromolecules, 1999The production of polyhydroxyalkanoate by anaerobic-aerobic activated sludge was reviewed concentrating on the biochemical mechanisms and on the trials to increase polyhydroxyalkanoate (PHA) content in activated sludge. The anaerobic aerobic activated sludge system selects microorganisms with the capabilities to couple glycolysis, polyphosphate ...
H, Satoh, T, Mino, T, Matsuo
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Measurement of glutathione in activated sludges
Water Research, 2004Thermal, electric, mechanical or oxidative stress seem a promising way to reduce the production of excess activated sludge during biological wastewater treatment. However, the adaptation and the resistance of the sludge microbial ecosystem to stress conditions is a major question as it may definitively limit the effect of some treatments.
M A, Dziurla +11 more
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