Achieving nitritation in an aerobic fluidized reactor for coking wastewater treatment: Operation stability, mechanisms and model analysis

Li, Zemin; Wei, Chaohai; Chen, Ying; Chen, Ben; Qiu, Guanglei; Wan, Jia; Wu, Haixia; Zhu, Shuang; Zhao, Heng

doi:10.1016/j.cej.2020.126816

Cited by 30 publications

(21 citation statements)

References 53 publications

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“…Nitrosomonas and Nitrospira were among the most important ammonium oxidizing bacteria (AOB, converting NH 4 + -N to NO 2 − -N) and nitrite-oxidizing bacteria (NOB, converting NO 2 − -N to NO 3 − -N), while AOB and NOB were autotrophic microorganisms with low specific growth rates and yields, sensitive to changes in the external environment, and easily affected by toxic substances. 21 Ellin6067 and Pleomorphomonas with nitrification functions were observed in O1 and O2 reactors. These microbial results demonstrated the feasibility of double O reactors to regulate ammonification, nitritation, and nitrification.…”

Section: Microbiological Analysis During O/h/h/o Process Operationmentioning

confidence: 93%

“…21,40 AuDen or HetDen will be a preferable option for complete denitrification with low energy consumption in the future. Li et al 21 showed that when the influent organic loading rate was held at 0.80−1.35 kg (m 3 days) −1 and DO at 3.0−5.0 mg L −1 , the toxic pollutant SCN − in CWW could preferentially inhibit NOB bacteria to achieve stable partial nitrification. The results of engineering data indicated that the P2PC-O/H/H/O process was able to achieve partial nitrification (NO 2 − -N/ NH 4 + -N ≥ 1.32) in the O1 reactor and provided the ideal temperature, pH, DO, and reaction substrate for the anammox bacteria in the H1 reactor.…”

Section: Potential Combinations Of Denitrificationmentioning

confidence: 99%

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O/H/H/O Process for Total Nitrogen Removal: An Upgrade of the A/A/O Process for Coking Wastewater Treatment

Chen

et al. 2023

ACS EST Eng.

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For industrial wastewater with high chemical oxygen demand (COD) and nitrogen, traditional wastewater treatment processes fail to achieve stable removal of typical pollutants under the conditions of variable raw water quality and low energy consumption. In this study, a novel pre-and post-physicochemical synergistic oxic−hydrolytic and denitrification−hydrolytic and denitrification−oxic (P2PC-O/H/H/O) process with in situ sludge separation in respective bioreactors was developed, in which signature pollutants and TN were completely removed through an optimized allocation of energy and carbon source. The 180-day full-scale operation showed that optimal removal of COD and TN (with removal rates of 97.5 and 94.5%, respectively) can be obtained at influent loading rates of 1.5−1.7 kg COD (m 3 days) −1 and 0.11−0.13 kg TN (m 3 days) −1 . In this process, O1 reactor ensured organic matter removal and pre-nitrification. Double H (H1 and H2) reactors allowed deep removal of TN through combined and coupled denitrification pathways. O2 reactor consolidated the overall treatment performance through decarbonization and nitrification. By P2PC, the refractory and easily biodegradable total organic carbon (TOC) was separated, achieving a qualitative and fractional utilization of electron donors. Analysis of the microbial community in the whole process indicated that Nitrosomonas (0.7−2.4%) and Nitrospira (0.3−1.7%) played a major role in nitrification. Ottowia (15.4−19.6%) and Limnobacter (1.8−7.4%) dominated in eliminating organic matter. The P2PC-O/H/H/O process with a four-sludge regime enabled a spatial allocation of functional microorganisms. The operation cost of the full-scale process was approximately 1.335 USD m −3 . In short, this P2PC-O/H/H/O process, with high efficiency and stability in signature pollutant removal, will be a promising wastewater treatment technology to revolutionize the existing anaerobic− anoxic−oxic (A/A/O) process, adding a new dimension to industrial wastewater management.

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Section: Microbiological Analysis During O/h/h/o Process Operationmentioning

confidence: 93%

Section: Potential Combinations Of Denitrificationmentioning

confidence: 99%

O/H/H/O Process for Total Nitrogen Removal: An Upgrade of the A/A/O Process for Coking Wastewater Treatment

Chen

et al. 2023

ACS EST Eng.

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“…NH 4 + -N was measured at 420 nm by Nessler’s reagent spectrophotometry . Thiocyanate (SCN – ) concentrations were determined using the colorimetric method with ferric nitrate as the chromogenic agent . Total cyanide (TCN) and cyanide were determined by isonicotinic acid-pyrazolone spectrophotometry at 638 nm .…”

Section: Methodsmentioning

confidence: 99%

“…27 Thiocyanate (SCN − ) concentrations were determined using the colorimetric method with ferric nitrate as the chromogenic agent. 28 Total cyanide (TCN) and cyanide were determined by isonicotinic acid-pyrazolone spectrophotometry at 638 nm. 29 The DO was measured with an Oxi-X meter (WTW Company, Germany), and pH was monitored by a pH SX731 meter (Shanghai Precision & Scientific Instrument Co., Ltd., China).…”

Section: Experimental Setup 211 Pilot-scale O/h/o System Descriptionmentioning

confidence: 99%

Evaluation of Carbon and Nitrogen Removal Performance of the Oxic-Hydrolytic and Denitrification-Oxic Process in Coking Wastewater Treatment

Wei

Pan

et al. 2022

ACS EST Water

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The novel oxic-hydrolytic and denitrification-oxic (O/H/O) process has attracted intensive attention from the industry and academia and has been applied in coking wastewater treatment practice in recent years. However, there has yet been a mechanism model that can systematically guide the design and operation of the O/H/O process in optimization. In this study, a two-step nitrification−denitrification activated sludge model no. 3 for coking wastewater (TCW-ASM3) model was established. The addition of new components and processes enables TCW-ASM3 to accurately simulate the biological reaction processes in the O/ H/O system. The simulation results show that the increase in the step feeding ratio (R1) will lead to the increase in biological effluent chemical oxygen demand (COD) and total nitrogen (TN). To meet the TN effluent target (TN < 50 mg/L), R2 > 320% was needed. The energy consumption under this effluent constraint (COD < 200 mg/L, TN < 50 mg/L) was 4.873−5.752 kWh/m 3 . The foregoing results showed that the O/H/O process could be adjusted in different modes according to the pollutant characteristics and effluent targets. This study is the first report of the O/H/O process model, which is capable of providing strategies of multiple targets for the pollutant removal from industrial wastewaters with high toxicity and high C/N ratio.

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“…Under such process conditions, an insufficient carbon source in the influent will lead to insufficient denitrification, resulting in an excessively high concentration of total nitrogen (nitrate nitrogen) in the effluent ( Rahimi et al, 2020 ). In order to solve the problems of high energy consumption, carbon source shortage, and low nitrogen removal efficiency faced by traditional nitrogen removal processes, novel processes based on partial nitritation have gradually developed in recent years, such as the partial nitritation and denitrification process (PN/D) and the partial nitritation and anaerobic ammonia oxidation process (PN/A; Duan et al, 2020 ; Li et al, 2020 , 2021 ; Qiu et al, 2020 ; Yao et al, 2021 ). Different from the traditional nitrification and denitrification process, nitrogen removal processes based on partial nitritation only oxidizes ammonia to nitrite, and then directly enters the subsequent nitrogen removal stage, which greatly saves oxygen consumption and carbon source demand, while reducing excess sludge production and greenhouse gas emissions ( Sinha and Annachhatre, 2006 ).…”

Section: Introductionmentioning

confidence: 99%

Achieving Partial Nitritation by Treating Sludge With Free Nitrous Acid: The Potential Role of Quorum Sensing

Jiang

Wang

et al. 2022

Front. Microbiol.

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Partial nitritation is increasingly regarded as a promising biological nitrogen removal process owing to lower energy consumption and better nitrogen removal performance compared to the traditional nitrification process, especially for the treatment of low carbon wastewater. Regulating microbial community structure and function in sewage treatment systems, which are mainly determined by quorum sensing (QS), by free nitrous acid (FNA) to establish a partial nitritation process is an efficient and stable method. Plenty of research papers reported that QS systems ubiquitously existed in ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB), and various novel nitrogen removal processes based on partial nitritation were successfully established using FNA. Although the probability that partial nitritation process might be achieved by the regulation of FNA on microbial community structure and function through the QS system was widely recognized and discussed, the potential role of QS in partial nitritation achievement by FNA and the regulation mechanism of FNA on QS system have not been reviewed. This article systematically reviewed the potential role of QS in the establishment of partial nitritation using FNA to regulate activated sludge flora based on the summary and analysis of the published literature for the first time, and future research directions were also proposed.

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Achieving nitritation in an aerobic fluidized reactor for coking wastewater treatment: Operation stability, mechanisms and model analysis

Cited by 30 publications

References 53 publications

O/H/H/O Process for Total Nitrogen Removal: An Upgrade of the A/A/O Process for Coking Wastewater Treatment

O/H/H/O Process for Total Nitrogen Removal: An Upgrade of the A/A/O Process for Coking Wastewater Treatment

Evaluation of Carbon and Nitrogen Removal Performance of the Oxic-Hydrolytic and Denitrification-Oxic Process in Coking Wastewater Treatment

Achieving Partial Nitritation by Treating Sludge With Free Nitrous Acid: The Potential Role of Quorum Sensing

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