Significance of pH control in anammox process performance at low temperature

Tomaszewski, Mariusz; Cema, Grzegorz; Ziembińska-Buczyńska, Aleksandra

doi:10.1016/j.chemosphere.2017.07.034

Cited by 52 publications

(11 citation statements)

References 24 publications

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“…Despite the similar results obtained in both research works, Laureni et al [11] used a previous A-stage for organic matter removal and they did not face the fluctuations of temperature and applied NLR that took place in the present study, which will be commonly happening in the full-scale systems. [31]. However, at the present study, the pH value was maintained under these values and nitrogen was successfully removed.…”

Section: Reactor Performancementioning

confidence: 51%

Pilot-scale ELAN ® process applied to treat primary settled urban wastewater at low temperature via partial nitritation-anammox processes

Pedrouso

Aiartza

Morales³

et al. 2018

Separation and Purification Technology

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A single stage partial nitritation and anammox granular pilot scale reactor (600 L) was operated to treat primary settled sewage in an urban wastewater treatment plant. The fed wastewater contained low total nitrogen concentrations of 6-25 mg TN/L and the system operated without temperature control ranging from 18 to 12 ºC. A control strategy, based on the pH value, was applied to stop the aeration supply. The pH setpoint was fixed at 6.0 and allowed obtaining a total nitrogen removal efficiency approximately of 50% treating a load of 67 mg TN/(L•d) without the addition of any chemicals. Although nitrite oxidizing bacteria were present in the inoculated sludge, when the pH-based control was implemented (day 30) the ammonium oxidation was favored compared to the nitrite oxidation activity. Then, the system operated stable the rest of the operational period (days 30-94) despite the presence of organic matter in the wastewater and the high variability of nitrogen load and temperature during the

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Section: Reactor Performancementioning

confidence: 51%

Pilot-scale ELAN ® process applied to treat primary settled urban wastewater at low temperature via partial nitritation-anammox processes

Pedrouso

Aiartza

Morales³

et al. 2018

Separation and Purification Technology

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“…For estimations in the second-order model 2 k axial points are needed. Because the distance from the center point to the factorial as well as axial points is the same and equals α = √k, this gives a spherical and rotatable design [ 59 , 60 ]. where T is temperature, and a, b, c, d, e, f are coefficients.…”

Section: Methodsmentioning

confidence: 99%

Removal of two cytostatic drugs: bleomycin and vincristine by white-rot fungi – a sorption study

Jureczko

Przystaś

2021

J Environ Health Sci Engineer

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Purpose Cytostatic drugs cannot be easily removed by conventional sewage treatment plants, resulting in their ultimate release into aquatic systems where they become a threat. Thus, new technologies which can be used to eliminate these drugs more effectively before they enter the environment are increasingly important. Fungal treatment of wastewaters is a promising and environmentally friendly technology for pharmaceutical remediation. The aim of this work is to examine the biosorption of two cytostatics, bleomycin and vincristine, in the aqueous solution by fungal biomass. Methods Five white-rot fungi were used in this study: Fomes fomentarius (CB13), Hypholoma fasciculare (CB15), Phyllotopsis nidulans (CB14), Pleurotus ostreatus (BWPH), and Trametes versicolor (CB8). Tests were conducted on different types of biomass (alive and dead – autoclaved) and in various physico-chemical conditions: varied drug concentrations (5, 10 and 15 mg/L), temperatures (from 15.4 to 29.6 °C), and pH (from 3.2 to 8.8). Results The results showed that among alive biomass, T. versicolor (CB8) had the greatest sorption ability for bleomycin and P. nidulans (CB14) worked best for vincristine. The tested sorption process could be described by a pseudo-second order kinetics model. Sorption equilibrium studies demonstrated that for bleomycin Redlich-Peterson, while for vincristine Langmuir model fitted best. The thermodynamic studies showed that the sorption process was endothermic chemisorption for bleomycin, and exothermic physisorption for vincristine. For both drugs the sorption ability increased with an increase of the pH value. Conclusion The biosorption on fungal biomass is a favorable alternative to conventional wastewater treatment processes for anticancer drug removal.

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“…28 Moreover, enhanced pH control of the process at a low temperature is discussed in the literature. 29 In the present work, the control methods developed for sidestream wastewater treatment, with the objective to improve the nitrogen RT (NRE), are reviewed extensively. Rule-based control strategies applied to minimize the aeration energy, sludge production, and carbon reagent dosage and to improve system performance are highlighted.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Review of Control and Operational Strategies for Partial Nitration/ANAMMOX System

Nikita

Nawaz

Lee

2019

Ind. Eng. Chem. Res.

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This study examines control strategies developed for wastewater treatment via partial nitration and the anaerobic ammonium oxidation process with the objective of enhancing nitrogen removal efficiency. The implementation of different control strategies were analyzed and explained with the help of pictorial representations. The benefits of the different control strategies were also briefly discussed. The biological process of nitrogen removal requires appropriate pairing between control and manipulated variables. Furthermore, the approach to follow when selecting suitable candidates and determining the pairing criterion was discussed. Although the conventional feedback–feedforward control logic is easy to implement, incorporation of the nonlinearity and complexity associated with the processes requires the design of advanced control systems.

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Significance of pH control in anammox process performance at low temperature

Cited by 52 publications

References 24 publications

Pilot-scale ELAN ® process applied to treat primary settled urban wastewater at low temperature via partial nitritation-anammox processes

Pilot-scale ELAN ® process applied to treat primary settled urban wastewater at low temperature via partial nitritation-anammox processes

Removal of two cytostatic drugs: bleomycin and vincristine by white-rot fungi – a sorption study

Comprehensive Review of Control and Operational Strategies for Partial Nitration/ANAMMOX System

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