Improvement of nutrient removal by optimizing the volume ratio of anoxic to aerobic zone in AAO-BAF system

Weitang, Zhang; Peng, Yongzhen; Ren, Nan-Qi; Liu, Qing-Song; Chen, Yongzhi

doi:10.1016/j.chemosphere.2013.08.047

Cited by 52 publications

(14 citation statements)

References 15 publications

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“…In wastewater treatment plants (WWTPs), phosphorus (P) removal always accompanies with nitrogen (N) removal, both requiring organic carbon which is often limiting (Zhang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Combining simultaneous nitrification-endogenous denitrification and phosphorus removal with post-denitrification for low carbon/nitrogen wastewater treatment

Wang

Zhao

et al. 2016

Bioresource Technology

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“…In wastewater treatment plants (WWTPs), phosphorus (P) removal always accompanies with nitrogen (N) removal, both requiring organic carbon which is often limiting (Zhang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Combining simultaneous nitrification-endogenous denitrification and phosphorus removal with post-denitrification for low carbon/nitrogen wastewater treatment

Wang

Zhao

et al. 2016

Bioresource Technology

Self Cite

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“…Long SRT can reduce the effectiveness of phosphorus removal. The Ana-Ano-MBR system is a single sludge system so there has been limitation to satisfy an proper SRT for both nitrifiers and PAOs in the MBR of the model [17]. For the phases of 2, 3, 4; average TP removal efficiencies of the model were 50.5, 55.9, 56.1%, respectively.…”

Section: Nitrogen Removal Efficiencymentioning

confidence: 99%

An Ana-Ano-MBR system for nutrient removal from brewery wastewater at various nitrate recirculation ratios

Van¹,

Dang²,

Nguyen³

2019

Sci. Tech. Dev. J.-Sci. Earth Environ.

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Anaerobic and anoxic variations were combined with membrane bioreactor to form an Anaerobic/Anoxic configuration in MBR-based (Ana-Ano-MBR) system for improving the system performance in terms of organic degradation and nutrient removal from brewery wastewater. The model of Ana-Ano-MBR system made from polyacrylic with the capacity of 42 liters was operated with organic loading rate of 0.75 kgCOD/m3.day. The results showed that for the nitrate recycling ratios of 100, 200, 300%, average NH4+-N and TN removal efficiencies of the model were 95.1 and 76.6, 98.5 and 89.6, 98.9 and 90.2%, respectively, and the output values of NH4+-N and TN were within the limits of Vietnam National Standards (QCVN 40:2011/BTNMT, column A). Treatment efficiencies of COD and TP were over 90% and below 60%, respectively, during the whole experiment period. Low phosphorus removal efficiency was the drawback of Ana-Ano-MBR system due to the lack of appropriate system configuration and operational conditions for PAOs’ growth and activity.

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“…In the EBPR system, phosphorus accumulating organisms (PAOs) can be favored and cultivated under alternating anaerobic-aerobic environments [9]. During anaerobic phase, PAOs takes up volatile fatty acid (VFA) and store them as intracellular polyhydroxyalkanoates (PHA), using energy generated from hydrolysis of intracellular polyphosphate (polyP) to P; and then, PAOs accumulates excessive amounts of P (i.e., exceeding cell normal metabolic requirements) to recover the intracellular polyP levels in subsequent aerobic condition, in which energy mainly originates from the degradation of stored PHA [10,11]. With the subsequent anaerobic-aerobic cycles, P can be ultimately removed by daily excess sludge discharge.…”

Section: Introductionmentioning

confidence: 99%

Denitrifying phosphorus accumulating organisms enrichment and their characteristics in a denitrifying enhanced biological phosphorus removal system

H¹,

Wang²

2017

Environ. Protect. Eng.

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Denitrifying phosphorus accumulating organisms (DPAOs) play an important role in simultaneous removal denitrifying nitrogen (N) and phosphorus (P). Their enrichment and characteristics were investigated. A denitrifying EBPR reactor, performing continuous anaerobic/anoxic conditions, was used to enrich DPAOs in this study. Through 60 days operation, DPAOs was successfully cultivated in the denitrifying EBPR system and P concentration in the effluent was stable and low with less than 0.5 mg/dm 3. Energy dispersive spectroscopy (EDS) analysis showed that P content in anoxic end sludge gradually increased with enrichment operation, which accounted for 2.9, 4.7, 6.2, and 7.9 wt. % in sludge samples at day 0 (i.e., seed sludge), and days 20, 40 and 60, respectively. Based on the batch test, a significant positive correlation was found between COD consumption and P release in anaerobic conditions and between nitrogen removal and phosphorus uptake in anoxic conditions. Furthermore, in anaerobic conditions, the P release rate was 4.2 mg P/(g MLSS•h) being higher than the P uptake rate (2.8 mg P/(g MLSS•h)) in anoxic conditions. Despite this, total anaerobic P release (8.5 mg P/(g MLSS)) was lower than anoxic P uptake total amount (11.2 mg P/(g MLSS)), implying an excess P uptake in anoxic environment. One whole cycle displayed the obviously denitrifying simultaneous nitrogen and phosphorus removal with more than 95% removal efficiencies in the denitrifying EBPR system.

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Improvement of nutrient removal by optimizing the volume ratio of anoxic to aerobic zone in AAO-BAF system

Cited by 52 publications

References 15 publications

Combining simultaneous nitrification-endogenous denitrification and phosphorus removal with post-denitrification for low carbon/nitrogen wastewater treatment

Combining simultaneous nitrification-endogenous denitrification and phosphorus removal with post-denitrification for low carbon/nitrogen wastewater treatment

An Ana-Ano-MBR system for nutrient removal from brewery wastewater at various nitrate recirculation ratios

Denitrifying phosphorus accumulating organisms enrichment and their characteristics in a denitrifying enhanced biological phosphorus removal system

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