Mesophilic and thermophilic activated sludge post-treatment of paper mill process water

Vogelaar, J.C.T.; Bouwhuis, E; Klapwijk, A.; Spanjers, Henri; Lier, J.B. van

doi:10.1016/s0043-1354(01)00397-9

Cited by 42 publications

(19 citation statements)

References 25 publications

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“…In some instances, thermophilic aerobic systems have been employed to biodegrade the wastewaters of high strength, and tremendous COD reductions have been reported in both laboratory and pilot scale experiments [51,52]. However, the thermophilic systems exhibited poor bacterial flocculation characteristics due to the dispersed growing microorganisms (no biofilm formation) which made bacterial separation from the treated effluent difficult [53,54].…”

Section: Biofilm Formationmentioning

confidence: 99%

Biofilm reactors for industrial bioconversion processes: employing potential of enhanced reaction rates

et al. 2005

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This article describes the use of biofilm reactors for the production of various chemicals by fermentation and wastewater treatment. Biofilm formation is a natural process where microbial cells attach to the support (adsorbent) or form flocs/aggregates (also called granules) without use of chemicals and form thick layers of cells known as "biofilms." As a result of biofilm formation, cell densities in the reactor increase and cell concentrations as high as 74 gL -1 can be achieved. The reactor configurations can be as simple as a batch reactor, continuous stirred tank reactor (CSTR), packed bed reactor (PBR), fluidized bed reactor (FBR), airlift reactor (ALR), upflow anaerobic sludge blanket (UASB) reactor, or any other suitable configuration. In UASB granular biofilm particles are used. This article demonstrates that reactor productivities in these reactors have been superior to any other reactor types. This article describes production of ethanol, butanol, lactic acid, acetic acid/vinegar, succinic acid, and fumaric acid in addition to wastewater treatment in the biofilm reactors. As the title suggests, biofilm reactors have high potential to be employed in biotechnology/bioconversion industry for viable economic reasons. In this article, various reactor types have been compared for the above bioconversion processes.

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Section: Biofilm Formationmentioning

confidence: 99%

Biofilm reactors for industrial bioconversion processes: employing potential of enhanced reaction rates

et al. 2005

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“…Based on the OUR measurements of the activated sludge, the standardized respirometric tests have been established (Cokgor et al, 2007). The degradation extent in an aerobic reactor is highly dependent on dissolved oxygen (Wilén and Balmér, 1999), temperature (Vogelaar et al, 2002), organic matter, nutrients and micronutrients (Pamukoglu and Kargi, 2007). These parameters are also important for consideration of reasonable operation of wastewater treatment plants.…”

Section: Compoundmentioning

confidence: 99%

Inhibitory effects of polar and non-polar organic substances on activated sludge activity

Inglezakis¹,

Kudarova

Tarassov

et al. 2017

Desalination and Water Treatment

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a b s t r ac tAs is well known, several organic compounds, more often found in industrial wastewater, exhibit inhibitory effects on biomass activity, therefore, leading to poor wastewater treatment efficiency. This study presents the experimental results on the inhibition effects of 14 polar and non-polar organic compounds on the activity of activated sludge in the concentration range of 50-1,000 ppm. Two different activated sludge samples used, one of low activity and another of high activity. The organic compounds tested are: phenol, 2-chlorophenol, nitrophenol, resorcinol, dioxane, acetonitrile and benzotriazole (polar); and toluene, styrene, cyclohexane, tetrachloromethane, paraxylene, benzene and hexane (non-polar). The results demonstrate that polar compounds exhibit higher toxicity than non-polar compounds and hydrophobicity plays a crucial role. The effects of polarity, hydrophobicity, solubility and volatility are discussed and the conclusion is that inhibition is complex phenomenon requiring extensive theoretical and experimental studies.

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“…The efficiency of degradation processes in an aerobic reactor is highly influenced by temperature (Vogelaar et al, 2002), dissolved oxygen (Wilén and Balmér, 1999), organic matter, nutrients and micronutrients (Pamukoglu and Kargi, 2007). These factors must also be considered for an adequate operation of wastewater treatment plants.…”

Section: Introductionmentioning

confidence: 99%

Activated sludge inhibition capacity index

Surerus

Giordano

Teixeira

2014

Braz. J. Chem. Eng.

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-Toxic compounds in sewage or industrial wastewater may inhibit the biological activity of activated sludge impairing the treatment process. This paper evaluates the Inhibition Capacity Index (ICI) for the assessment of activated sludge in the presence of toxicants. In this study, activated sludge was obtained from industrial treatment plants and was also synthetically produced. Continuous respirometric measurements were carried out in a reactor, and the oxygen uptake rate profile obtained was used to evaluate the impact of inhibiting toxicants, such as dissolved copper, phenol, sodium alkylbenzene sulfonate and amoxicillin, on activated sludge. The results indicate that ICI is an efficient tool to quantify the intoxication capacity. The activated sludge from the pharmaceutical industry showed higher resistance than the sludge from other sources, since toxicants are widely discharged in the biological treatment system. The ICI range was from 58 to 81% when compared to the synthetic effluent with no toxic substances.

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Mesophilic and thermophilic activated sludge post-treatment of paper mill process water

Cited by 42 publications

References 25 publications

Biofilm reactors for industrial bioconversion processes: employing potential of enhanced reaction rates

Biofilm reactors for industrial bioconversion processes: employing potential of enhanced reaction rates

Inhibitory effects of polar and non-polar organic substances on activated sludge activity

Activated sludge inhibition capacity index

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