Design, operation and technology configurations for enhanced biological phosphorus removal (EBPR) process: a review

Izadi, Parnian; Izadi, Parin; Eldyasti, Ahmed

doi:10.1007/s11157-020-09538-w

Cited by 73 publications

(30 citation statements)

References 199 publications

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“…Por otra parte, tanto con pretratamiento del agua residual o sin pretratamiento se obtuvieron altas remociones de PO 4 3en el agua residual, lo cual sugiere que C. vulgaris fue quien aportó de mayor manera en la remoción de PO 4 3-. De hecho, varios estudios [34][35][36] han demostrado la capacidad de C. vulgaris para consumir altas cantidades de PO 4 3-, así como la limitada capacidad de las bacterias en sistemas convencionales de tratamiento de agua para consumir fósforo, salvo si se implementan sistemas biológicos especiales con microorganismos acumuladores de polifosfato (PAOS) 37,38 .…”

Section: Discussionunclassified

Uso de aguas residuales de porcicultura y faenamiento para el crecimiento y obtención de biomasa algal de Chlorella vulgaris

Medrano-Barboza

Aguirre-Bravo

Encalada-Rosales

et al. 2021

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Diversas investigaciones respaldan el uso de microalgas como fuente de productos de interés biotecnológico, pero aún existen limitaciones para su implementación; como el uso de aguas residuales como medio de cultivo y la generación de biomasa en presencia de otros microorganismos que compiten por los nutrientes. En este estudio se compararon 3 métodos de desinfección para aguas residuales de porcicultura y faenamiento, y se evaluó su aplicabilidad para el cultivo de Chlorella vulgaris. Se probaron tres métodos de pretratamientos: irradiación UV, hipoclorito de sodio (NaClO) y ácido peracético (CH3CO3H) y se compararon los resultados con agua no tratada. Se determinó la generación de biomasa (g/L) y el consumo de nitratos, ortofosfatos y demanda química de oxígeno, durante 13 días de cultivo con pretratamiento y en agua sin tratar. La desinfección por UV durante 30 minutos eliminó completamente las bacterias, mientras que los tratamientos químicos con las concentraciones empleadas en este estudio lograron reducir parcialmente la carga bacteriana. El agua residual con pretratamiento por UV generó una biomasa de C. vulgaris de 0,2 g/L con elevados porcentajes de remoción de nutrientes del medio (97 y 89 % para nitratos y ortofosfatos), valores de remoción superiores a los presentados por la condición sin pretratamientos. Estos resultados sugieren la necesidad de desinfectar las aguas residuales para su implementación como medio de cultivo, además de indicar la factibilidad de su uso como medio de crecimiento complejo, con el objetivo de generar biomasa.

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Section: Discussionunclassified

Uso de aguas residuales de porcicultura y faenamiento para el crecimiento y obtención de biomasa algal de Chlorella vulgaris

Medrano-Barboza

Aguirre-Bravo

Encalada-Rosales

et al. 2021

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“…Moreover, these microorganisms vary in the utilization of inorganic and organic phosphorus; some microorganisms can form poly-P and then become dominant species ( Huang et al, 2015 ). Recent studies have mostly focused on the competition between DPAOs and glycogen-accumulating organisms (GAOs), and on the richness or composition of DPR microbial communities ( Izadi et al, 2020 ). Network analysis, thus, can add an important dimension to understand the microbial community of DPR process.…”

Section: Introductionmentioning

confidence: 99%

Ecological Insights Into Community Interactions, Assembly Processes and Function in the Denitrifying Phosphorus Removal Activated Sludge Driven by Phosphorus Sources

et al. 2021

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The microbial characteristics in the wastewater treatment plants (WWTPs) strongly affect their optimal performance and functional stability. However, a cognitive gap remains regarding the characteristics of the microbial community driven by phosphorus sources, especially co-occurrence patterns and community assembly based on phylogenetic group. In this study, 59 denitrifying phosphorus removal (DPR) activated sludge samples were cultivated with phosphorus sources. The results suggested that homogeneous selection accounted for the largest proportion that ranged from 35.82 to 64.48%. Deterministic processes dominated in 12 microbial groups (bins): Candidatus_Accumulibacter and Pseudomonas in these bins belonged to phosphate-accumulating organisms (PAOs). Network analysis revealed that species interactions were intensive in cyclic nucleoside phosphate-influenced microbiota. Function prediction indicated that cyclic nucleoside phosphates increased the activity of enzymes related to denitrification and phosphorus metabolism and increased the α-diversity of microorganism but decreased the diversity of metabolic function. Based on these results, it was assumed that cyclic nucleoside phosphates, rather than inorganic phosphates, are the most available phosphorus source for majority microorganisms in DPR activated sludge. The study revealed the important role of phosphorus source in the construction and assembly of microbial communities and provided new insights about pollutant removal from WWTPs.

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“…The mixed liquor circulates ceaselessly in closed-loop corridors of the OD (Izadi et al 2020), which is significantly different from other wastewater treatment processes. However, as the initial OD is only used for organic matter removal (Izadi et al, 2020), without consideration for nitrogen and phosphorus removal, dissolved oxygen (DO) is always uniformly and sufficiently supplied, so internal recirculation characteristics are never mentioned or used at the beginning of an OD application.…”

Section: Introductionmentioning

confidence: 99%

Parameters to characterize the internal recirculation of an oxidation ditch

Wang

2021

WSA

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Mixed liquor circulates ceaselessly in the closed-loop corridor in an oxidation ditch (OD), which is significantly different from other wastewater treatment processes. The internal recirculation ratio (IRR), i.e., the ratio between circulation flow rate (QCC) and influent flow rate (QIn), and the circulatory period (T), i.e. the time consumed for the mixed liquor to complete one lap in the circular corridor, was used to quantify the internal recirculation characteristics of the OD system. In order to elucidate the characteristics and applicability of IRR and T, this study obtained the numerical relationship between IRR and T by formula derivation. It also discusses the factors influencing IRR and analyses the applications of IRR and T. The results showed that IRR = QCC/QIn = HRT/T = HRT IRF (HRT = hydraulic retention time of the mixed liquor in the circular corridor; IRF = internal recirculation frequency). Moreover, three kinds of parameters had an effect on IRR: QIn; reactor dimensions, i.e., length (Lmid), width (B), and height (H) of the circular corridor; and horizontal velocity of the mixed liquor in the circular corridor (v). QIn changed IRR by altering HRT. However, B, H, Lmid, and v changed IRR by altering IRF and T. Furthermore, the same IRR corresponded to many different HRT and IRF. Therefore, when QIn and QCC varied in the OD system, using HRT and IRF to evaluate the variation of QIn and QCC, respectively, was better than using IRR to evaluate their synthetical variation. IRF and T were useful for directly and precisely characterizing the circulation speed and circulation flow rate in the circular corridor, while IRR was more useful for evaluating the dilution effect of reflux on influent.

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Design, operation and technology configurations for enhanced biological phosphorus removal (EBPR) process: a review

Cited by 73 publications

References 199 publications

Uso de aguas residuales de porcicultura y faenamiento para el crecimiento y obtención de biomasa algal de Chlorella vulgaris

Uso de aguas residuales de porcicultura y faenamiento para el crecimiento y obtención de biomasa algal de Chlorella vulgaris

Ecological Insights Into Community Interactions, Assembly Processes and Function in the Denitrifying Phosphorus Removal Activated Sludge Driven by Phosphorus Sources

Parameters to characterize the internal recirculation of an oxidation ditch

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