Pilot Study of Oxic-Anoxic Process under Low Dissolved Oxygen for Nitrogen Removal from Low COD/N Tropical Wastewater

Article Engineering, Environmental

Application of intermittent aeration in nitrogen removal process: development, advantages and mechanisms

Yuanyuan Miao et al.

Summary: Intermittent aeration is an effective strategy for biological wastewater treatment, allowing for advanced nitrogen removal and reduced energy consumption. It is suitable for partial nitrification and denitrification processes.

CHEMICAL ENGINEERING JOURNAL (2022)

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Review Environmental Sciences

Application of external carbon source in heterotrophic denitrification of domestic sewage: A review

Xinrong Fu et al.

Summary: This review summarizes the effects of liquid, solid, and gaseous carbon sources on denitrification, finding that sodium acetate is the preferred external carbon source, biodegradable polymers perform better in solid-phase denitrification but have a higher price, and methane can be used as a gaseous carbon source. Liquid carbon sources are better controlled and utilized, and high carbon to nitrogen ratio, hydraulic retention time, and temperature promote denitrification.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

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Article Agricultural Engineering

Achieving simultaneous nitrification, denitrification, and phosphorus removal in pilot-scale flow-through biofilm reactor with low dissolved oxygen concentrations: Performance and mechanisms

Chao Wang et al.

Summary: In this pilot-scale study, a flow-through biofilm reactor (FTBR) was found to be efficient for municipal wastewater treatment, achieving high removal rates of ammonium, total nitrogen, total phosphorus, and chemical oxygen demand. The FTBR demonstrated the feasibility and robustness of a simultaneous nitrification, denitrification, and phosphorous removal process. The complex interactions of bacteria in the dynamic biofilm and cooperative interactions of bacteria in the suspended sludge were also observed. The study provides insights into the ecological mechanisms responsible for nutrient removal.

BIORESOURCE TECHNOLOGY (2022)

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Article Environmental Sciences

Enhanced biological nitrogen removal under low dissolved oxygen in an anaerobic-anoxic-oxic system: Kinetics, stoichiometry and microbial community

Lin Wang et al.

Summary: The study found that specific nitrification and denitrification rates increased under low dissolved oxygen conditions, with a decrease in the oxygen half saturation constant for both ammonia oxidizing bacteria and nitrite oxidizing bacteria. The observed yield coefficients also increased, along with higher relative abundances of AOB, NOB, and denitrifiers detected through high-throughput sequencing. Improved simultaneous nitrification and denitrification under low DO conditions contributed to enhanced nitrogen removal.

CHEMOSPHERE (2021)

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Article Multidisciplinary Sciences

Wastewater COD characterization: RBCOD and SBCOD characterization analysis methods

Jingbing Zhang et al.

Summary: In this study, a comprehensive evaluation of biodegradable organic matters in wastewater was conducted using the respirometry method, confirming the optimal initial substrate to biomass ratio and obtaining degradation curves for rapidly and slowly biodegradable COD components. Based on the results, a suitable wastewater COD characterization method for RBCOD and SBCOD was proposed, providing strong support for effective process design, diagnosis, and optimization of WWTPs.

SCIENTIFIC REPORTS (2021)

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Article Biotechnology & Applied Microbiology

Efficient Nitrification and Low-Level N2O Emission in a Weakly Acidic Bioreactor at Low Dissolved-Oxygen Levels Are Due to Comammox

Deyong Li et al.

Summary: This study demonstrated that comammox Nitrospira can adapt well to weakly acidic and low-DO conditions, resulting in efficient nitrification and reduced N2O emissions in wastewater treatment.

APPLIED AND ENVIRONMENTAL MICROBIOLOGY (2021)

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Article Engineering, Environmental

Long-Term Low Dissolved Oxygen Operation Decreases N2O Emissions in the Activated Sludge Process

Guoqiang Liu et al.

Summary: The study showed that short-term low dissolved oxygen increased N2O emissions, while long-term low DO decreased emissions by increasing the abundance of ammonia oxidizers in the ASP. Long-term low DO reduced AOB abundance but increased AOA, with AOA potentially inhibiting N2O production. The positive correlation between N2O emissions and nitrite concentration became insignificant after 80 days of low DO operation, suggesting that ASPs can reduce N2O production and CO2 emissions by operating with low DO and extended sludge age.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

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Article Engineering, Environmental

Kinetic characterization of a low-dissolved-oxygen oxic-anoxic process treating low COD/N tropical wastewater revealed selection of nitrifiers with high substrate affinity

Seow Wah How et al.

Summary: This study simulated and calibrated the low-DO OA process in tropical wastewater treatment plants based on the ASM1 model, revealing that the microbes in the low-DO OA SBR had lower growth rates and affinities, supporting the proliferation of nitrifiers under low-dissolved-oxygen conditions. The research emphasizes the importance of using suitable parameters in the design of wastewater treatment plants in tropical regions.

JOURNAL OF WATER PROCESS ENGINEERING (2021)

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Article Biochemistry & Molecular Biology

How to Produce an Alternative Carbon Source for Denitrification by Treating and Drastically Reducing Biological Sewage Sludge

Maria Cristina Collivignarelli et al.

Summary: Tests on the semi-full scale Thermophilic Alternate Membrane Biological Reactor revealed high COD removal yields, low specific sludge production, and the potential for using aqueous carbon residue in denitrification processes. The ThAlMBR demonstrated compatibility with diverse sludge line points and ensured important sludge minimization in both thickened and digested biological sewage sludge.

MEMBRANES (2021)

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Article Engineering, Environmental

Tropical-based EBPR process: The long-term stability, microbial community and its response towards temperature stress

Phiak Kim Poh et al.

Summary: This study investigated the effect of temperature on tropical inoculated EBPR systems, concluding that the system remained stable at 30 degrees Celsius with high P-removal efficiency. However, the system deteriorated at 40 degrees Celsius and the threshold temperature for tropical EBPR failure was found to be between 35 and 40 degrees Celsius.

WATER ENVIRONMENT RESEARCH (2021)

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Article Environmental Sciences

Performance of Full-Scale Thermophilic Membrane Bioreactor and Assessment of the Effect of the Aqueous Residue on Mesophilic Biological Activity

Maria Cristina Collivignarelli et al.

Summary: This study evaluated the performance of one of the two full-scale thermophilic membrane bioreactors in Italy, showing that removal yields on chemical pollutants increased with input load, while sludge production remained low during stability. Oxygen uptake rate tests excluded the acute inhibition of mesophilic biomass by aqueous residues, except for certain substrates. Respirometric tests proved to be a valuable tool for assessing the acute effects of ThMBR's aqueous residues on mesophilic biomass.

WATER (2021)

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Review Agricultural Engineering

Insight into the impacts of organics on anammox and their potential linking to system performance of sewage partial nitrification-anammox (PN/A): A critical review

Jialin Li et al.

BIORESOURCE TECHNOLOGY (2020)

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Article Engineering, Environmental

Characterization of slowly-biodegradable organic compounds and hydrolysis kinetics in tropical wastewater for biological nitrogen removal

Seow Wah How et al.

WATER SCIENCE AND TECHNOLOGY (2020)

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Article Environmental Sciences

Suitability of SBR for Wastewater Treatment and Reuse: Pilot-Scale Reactor Operated in Different Anoxic Conditions

Omar Alagha et al.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH (2020)

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Article Environmental Sciences

Achieving stable two-stage mainstream partial-nitrification/anammox (PN/A) operation via intermittent aeration

Yongzhi Chen et al.

CHEMOSPHERE (2020)

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Article Engineering, Environmental

Metagenomic analysis reveals enhanced nutrients removal from low C/N municipal wastewater in a pilot-scale modified AAO system coupling electrolysis

Wei Huang et al.

WATER RESEARCH (2020)

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Article Engineering, Environmental

Analysis of eutrophication potential of municipal wastewater

M. Preisner et al.

WATER SCIENCE AND TECHNOLOGY (2020)

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Article Environmental Sciences

Advanced nitrogen removal of low C/N ratio sewage in an anaerobic/aerobic/anoxic process through enhanced post-endogenous denitrification

Xinjie Gao et al.

CHEMOSPHERE (2020)

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Article Environmental Sciences

An efficient oxic-anoxic process for treating low COD/N tropical wastewater: Startup, optimization and nitrifying community structure

Seow Wah How et al.

CHEMOSPHERE (2020)

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Article Agricultural Engineering

Improved performance of simultaneous nitrification and denitrification via nitrite in an oxygen-limited SBR by alternating the DO

Lilong Yan et al.

BIORESOURCE TECHNOLOGY (2019)

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Article Multidisciplinary Sciences

Operation mode of a step-feed anoxic/oxic process with distribution of carbon source from anaerobic zone on nutrient removal and microbial properties

Yijun Shen et al.

SCIENTIFIC REPORTS (2019)

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Article Biotechnology & Applied Microbiology

Advanced nitrogen removal without addition of external carbon source in an anaerobic/aerobic/anoxic sequencing batch reactor

Liangliang Shi et al.

BIOPROCESS AND BIOSYSTEMS ENGINEERING (2019)

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Article Environmental Sciences

High-rate partial-nitritation and efficient nitrifying bacteria enrichment/out-selection via pH-DO controls: Efficiency, kinetics, and microbial community dynamics

Dachao Zhang et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2019)

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Article Environmental Sciences

Enhanced nitrogen removal in an anoxic-oxic-anoxic process treating low COD/N tropical wastewater: Low-dissolved oxygen nitrification and utilization of slowly-biodegradable COD for denitrification

Seow Wah How et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2019)

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Article Engineering, Environmental

Post-endogenous denitrification and phosphorus removal in an alternating anaerobic/oxic/anoxic (AOA) system treating low carbon/nitrogen (C/N) domestic wastewater

Weihua Zhao et al.

CHEMICAL ENGINEERING JOURNAL (2018)

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Article Environmental Sciences

Combining partial nitrification and post endogenous denitrification in an EBPR system for deep-level nutrient removal from low carbon/nitrogen (C/N) domestic wastewater

Ji Zhao et al.

CHEMOSPHERE (2018)

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Article Engineering, Environmental

Low-dissolved-oxygen nitrification in tropical sewage: an investigation on potential, performance and functional microbial community

S. W. How et al.

WATER SCIENCE AND TECHNOLOGY (2018)

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Article Engineering, Environmental

An anaerobic hybrid bioreactor for biologically enhanced primary treatment of domestic wastewater under low temperatures

Andrew Pfluger et al.

ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY (2018)

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Article Engineering, Environmental

Analysis of energy efficiency and energy consumption costs: a case study for regional wastewater treatment plant in Malaysia

Nor Azuana Ramli et al.

JOURNAL OF WATER REUSE AND DESALINATION (2017)

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Article Environmental Sciences

Aeration optimization through operation at low dissolved oxygen concentrations: Evaluation of oxygen mass transfer dynamics in different activated sludge systems

Haitao Fan et al.

JOURNAL OF ENVIRONMENTAL SCIENCES (2017)

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Article Engineering, Environmental

Pilot plant demonstration of stable and efficient high rate biological nutrient removal with low dissolved oxygen conditions

Natalie A. Keene et al.

WATER RESEARCH (2017)

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Article Engineering, Environmental

Hydrolysis of particulate settleable solids (PSS) in activated sludge is determined by the bacteria initially adsorbed in the sewage

Mourad Benneouala et al.

WATER RESEARCH (2017)

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Article Agricultural Engineering

Enhanced nitrogen removal from coal gasification wastewater by simultaneous nitrification and denitrification (SND) in an oxygen-limited aeration sequencing batch biofilm reactor

Weiwei Ma et al.

BIORESOURCE TECHNOLOGY (2017)

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Proceedings Paper Engineering, Civil

Simultaneous nitrification and denitrification with low dissolved oxygen level and C/N ratio

Elena Gogina et al.

XXV POLISH - RUSSIAN - SLOVAK SEMINAR -THEORETICAL FOUNDATION OF CIVIL ENGINEERING (2016)

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Article Engineering, Environmental

Treating low carbon/nitrogen (C/N) wastewater in simultaneous nitrification-endogenous denitrification and phosphorous removal (SNDPR) systems by strengthening anaerobic intracellular carbon storage

Xiaoxia Wang et al.

WATER RESEARCH (2015)

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Article Biotechnology & Applied Microbiology

Kinetic and stoichiometric characterization for efficient enhanced biological phosphorus removal (EBPR) process at high temperatures

Kee Fui Liau et al.

BIOPROCESS AND BIOSYSTEMS ENGINEERING (2015)

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Article Engineering, Environmental

The effect of dissolved oxygen on N2O production by ammonia-oxidizing bacteria in an enriched nitrifying sludge

Lai Peng et al.

WATER RESEARCH (2014)

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Article Agricultural Engineering

Enhanced biological nutrient removal in sequencing batch reactors operated as static/oxic/anoxic (SOA) process

Dechao Xu et al.

BIORESOURCE TECHNOLOGY (2013)

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Article Engineering, Environmental

Long-term performance evaluation of EBPR process in tropical climate: start-up, process stability, and the effect of operational pH and influent C:P ratio

Y. H. Ong et al.

WATER SCIENCE AND TECHNOLOGY (2013)

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Article Biotechnology & Applied Microbiology

Enhancing nitrogen removal in an Orbal oxidation ditch by optimization of oxygen supply: practice in a full-scale municipal wastewater treatment plant

Xin Zhou et al.

BIOPROCESS AND BIOSYSTEMS ENGINEERING (2012)

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Article Engineering, Environmental

An Observation on Sludge Granulation in an Enhanced Biological Phosphorus Removal Process

Ying Hui Ong et al.

WATER ENVIRONMENT RESEARCH (2012)

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Article Biotechnology & Applied Microbiology

Low-Dissolved-Oxygen Nitrifying Systems Exploit Ammonia-Oxidizing Bacteria with Unusually High Yields

Micol Bellucci et al.

APPLIED AND ENVIRONMENTAL MICROBIOLOGY (2011)

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Article Engineering, Environmental

Advancing post-anoxic denitrification for biological nutrient removal

Matt Winkler et al.

WATER RESEARCH (2011)

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Article Engineering, Environmental

Effect of dynamic process conditions on nitrogen oxides emission from a nitrifying culture

Marlies J. Kampschreur et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2008)

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Article Engineering, Environmental

Aeration of large-scale municipal wastewater treatment plants: state of the art

Diego Rosso et al.

WATER SCIENCE AND TECHNOLOGY (2008)

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Article Environmental Sciences

Denitrification potential enhancement by addition of external carbon sources in a pre-denitrification process

Peng Yong-zhen et al.

JOURNAL OF ENVIRONMENTAL SCIENCES (2007)

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Article Environmental Sciences

Chemical composition associated with different particle size fractions in municipal, industrial, and agricultural wastewaters

C Sophonsiri et al.

CHEMOSPHERE (2004)

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Pilot Study of Oxic-Anoxic Process under Low Dissolved Oxygen for Nitrogen Removal from Low COD/N Tropical Wastewater

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