Simultaneous nitrogen and phosphorus removal by interactions between phosphate accumulating organisms (PAOs) and denitrifying phosphate accumulating organisms (DPAOs) in a sequencing batch reactor

Li, Huankai; Zhong, Yuming; Huang, Hui; Tan, Zexing; Sun, Yan; Liu, Hui

doi:10.1016/j.scitotenv.2020.140852

Cited by 76 publications

(14 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The high abundance of Dechloromonas, Candidatus Microthrix, Pseudomonas, Rhodocyclaceae, and Candidatus Accumulibacter (the total count of 4.7% on day 1, 13.6% on day 81, and 19.6% on day 112) explained the stable performance of phosphorus removal of the system. These aforementioned genera were widely reported as organisms belonging to DPAOs and PAOs. , Moreover, on day 112, the relative abundance of Dechloromonas (16.5%) was higher than that of Candidatus Microthrix (0.05%) and Candidatus Accumulibacter (0.6%). However, in traditional enhanced biological phosphorus removal system, Candidatus Accumulibacter not Dechloromonas was reported as the dominant PAOs .…”

Section: Resultsmentioning

confidence: 99%

“…These aforementioned genera were widely reported as organisms belonging to DPAOs and PAOs. 29,30 Moreover, on day 112, the relative abundance of Dechloromonas (16.5%) was higher than that of Candidatus Microthrix (0.05%) and Candidatus Accumulibacter (0.6%). However, in traditional enhanced biological phosphorus removal system, Candidatus Accumulibacter not Dechloromonas was reported as the dominant PAOs.…”

Section: Methodsmentioning

confidence: 98%

See 1 more Smart Citation

Feasibility of Partial Nitrification Combined with Nitrite-Denitrification Phosphorus Removal and Simultaneous Nitrification–Endogenous Denitrification for Synchronous Chemical Oxygen Demand, Nitrogen, and Phosphorus Removal

Zhen

Zhao

Yu³

et al. 2022

ACS EST Water

View full text Add to dashboard Cite

A combination of partial nitrification and nitrite-denitrifying phosphorus removal and simultaneous nitrification-endogenous denitrification (nDNPR-SNED) in two sequencing batch reactors was developed for synchronous chemical oxygen demand (COD), nitrogen (N), and phosphorus (P) removal by regulating dissolved oxygen (DO) and influent nitrite concentrations. COD, total nitrogen, and P removal efficiencies of 87.4 ± 0.5, 91.6 ± 1.1, and 97.8 ± 0.6% were obtained after 112 days of anaerobic/anoxic/aerobic operation. Mass balance analysis confirmed that 91.9% of the COD was stored as intracellular carbon at the anaerobic stage, and 99.6% of PO4 3––P and 99.8% of NO2 ––N were eliminated via the nDNPR process at the anoxic stage, and at the aerobic stage, the SNED process contributed to 68.7% nitrogen removal. Genera of Candidatus Competibacter, Dechloromonas, Ellin6067, and Nitrospirae were the dominant consortia with a relative abundance of 26.5, 16.5, 1.0, and 1.1%, respectively. In the metabolic pathway model, β-hydroxybutyrate was the main endogenous driving force for nitrogen and phosphorus removal. Compared with conventional biological nitrogen and phosphorus removal processes, the combined process could achieve 6.7% saving in the total cost. The proposed approach provides an economic and technical alternative for C-, N-, and P-laden wastewater treatment, reducing both carbon demand and aeration consumption.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 98%

Feasibility of Partial Nitrification Combined with Nitrite-Denitrification Phosphorus Removal and Simultaneous Nitrification–Endogenous Denitrification for Synchronous Chemical Oxygen Demand, Nitrogen, and Phosphorus Removal

Zhen

Zhao

Yu³

et al. 2022

ACS EST Water

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

“…An activated sludge process and many other processes are used for the removal of nitrogen and phosphorus from the effluents but it is often the case that the effluent from the wastewater treatment plants has remaining phosphorus and nitrogen in the form of ammonium and nitrate. Therefore, a post-treatment process also requires for the removal of nitrogen and phosphorus from the effluents 40 , 41 . In the present study, the removal efficiency of nitrogen and phosphorus were monitored by BK1 and BK2 from the treated and untreated effluent sample of beverage industry and found removal in both the effluent by both the strain above 90%.…”

Section: Discussionmentioning

confidence: 99%

“…Excessive release of nitrogen and phosphorus from human activities into runoff which imposes great risk to the ecosystem and degrades the fresh water quality 42 – 44 . Previously different scientist tried to find the efficient strain for the removal of phosphorus and nitrogen like, Li et al investigated that microorganisms i.e., Candida tusaccumulibacter, Zoogloea and Dechloromonas removal efficiency of PO 4 3– –P reached up to 93.64% at an initial concentration of 0.7 mg/L and 92.34% of NO 3 − –N at an initial concentration of 0.6 mg/L correspondingly 45 . Ge et al investigated that the removal efficiency of total nitrogen 69.4 ± 21.4% at an initial concentration of 4.0 ± 3.2 mg/L whereas removed total phosphorus 87.7 ± 14.2% at an initial concentration of 0.25 ± 0.20 mg/L correspondingly by using the bacteria Anaeromyxobacter (4.9%), Ramlibacter (4.8%), Defluviicoccus (4.2%), Azoarcus (3.7%) and Geobacter (3.4%) 46 .…”

Section: Discussionmentioning

confidence: 99%

In-situ remediation of nitrogen and phosphorus of beverage industry by potential strains Bacillus sp. (BK1) and Aspergillus sp. (BK2)

Bhambri¹,

Karn²,

Singh³

2021

Sci Rep

View full text Add to dashboard Cite

The bioremediation of beverage (treated and untreated) effluent was investigated in the current study by using the potential strains of Bacillus sp. (BK1) and Aspergillus sp. (BK2). Effluent was collected from the beverage industry (initial concentration of nitrogen were 3200 ± 0.5 mg/L and 4400 ± 0.6 mg/L whereas phosphorus were 4400 ± 2 mg/L and 2600 ± 1 mg/L in treated and untreated effluent correspondingly). Further, the BK1 and BK2 exhibited high removal competence after 1 week of incubation; BK1 removed phosphorus 99.95 ± 0.7% and BK2 95.69 ± 1% in treated effluent while nitrogen removed about 99.90 ± 0.4% by BK1 and 81.25 ± 0.8% by BK2 (initial concentration of phosphorus 4400 ± 2 mg/L and nitrogen 3200 ± 0.5 mg/L). Next, in the untreated effluent BK1 removed 99.81 ± 1% and BK2 99.85 ± 0.8% of phosphorus while removed nitrogen 99.93 ± 0.5% by BK1 and 99.95 ± 1.2% by BK2 correspondingly, (initial concentration of phosphorus 2600 ± 1 mg/L and nitrogen 4400 ± 0.6 mg/L). The physiochemical composition of sample such as pH, total carbohydrates, total proteins, total solids of treated and untreated effluent were also analysed before and after treatment of both the samples. BK1 and BK2 increased the pH by 8.94 ± 0.3 and 9.5 ± 0.4 correspondingly in treated effluent whereas 6.34 ± 0.5 and 7.5 ± 0.2 correspondingly in untreated effluent (initial pH of treated and untreated effluent 7.07 ± 0.8 and 4.85 ± 0.3 correspondingly). Total Carbohydrates removed about 17,440 ± 4.6 mg/L and 10,680 ± 3.2 mg/L by BK1 and BK2 correspondingly in treated effluent whereas 18,050 ± 3.5 mg/L and 18,340 ± 2.3 mg/L correspondingly in untreated effluent (initial concentration of treated and untreated effluent 25,780 ± 1.6 mg/L and 35,000 ± 1.5 mg/L correspondingly) while BK1 and BK2 removed total proteins by 30.336 ± 4.6 mg/L and 40.417 ± 2.3 mg/L correspondingly in treated effluent whereas 18.929 ± 1.2 mg/L and 17.526 ± 0.8 mg/L correspondingly in untreated effluent (initial concentration of treated and untreated effluent 49.225 ± 1.5 mg/L and 20.565 ± 1 mg/L correspondingly). Next, total solids removed by BK1 and BK2 2.5 ± 0.3 mg/L and 1.6 ± 0.6 mg/L correspondingly in treated effluent whereas 5.5 ± 0.8 mg/L and 4.6 ± 0.6 mg/L in untreated effluent (initial concentration of treated and untreated effluent 5.6 ± 1.5 mg/L and 9.48 ± 1.2 mg/L correspondingly). Both the strains BK1 and BK2 are highly efficient in the nitrogen and phosphorus removal therefore this strain may be applied for the potential remediation.

show abstract

Simultaneous nitrogen and phosphorus removal by interactions between phosphate accumulating organisms (PAOs) and denitrifying phosphate accumulating organisms (DPAOs) in a sequencing batch reactor

Cited by 76 publications

References 47 publications

Feasibility of Partial Nitrification Combined with Nitrite-Denitrification Phosphorus Removal and Simultaneous Nitrification–Endogenous Denitrification for Synchronous Chemical Oxygen Demand, Nitrogen, and Phosphorus Removal

Feasibility of Partial Nitrification Combined with Nitrite-Denitrification Phosphorus Removal and Simultaneous Nitrification–Endogenous Denitrification for Synchronous Chemical Oxygen Demand, Nitrogen, and Phosphorus Removal

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

In-situ remediation of nitrogen and phosphorus of beverage industry by potential strains Bacillus sp. (BK1) and Aspergillus sp. (BK2)

Contact Info

Product

Resources

About