Enrichment of ANAMMOX bacteria from conventional activated sludge entrapped in poly(vinyl alcohol)/sodium alginate gel

Bae, Hyun-Joo; Choi, Minkyu; Lee, Changsoo; Chung, Yun‐Chul; Yoo, Young Je; Lee, Seockheon

doi:10.1016/j.cej.2015.06.111

Cited by 79 publications

(29 citation statements)

References 63 publications

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“…2). A similar trend of increased nitrogen removal with increasing loading rate was also recorded in other immobilized anammox reactors [7,10,18,22].…”

Section: Resultssupporting

confidence: 56%

“…Then this ratio was close to the theoretical value from the day 40. By comparison, these two ratios were close to the values documented in other immobilized anammox reactors [7,18,22], suggesting the responsibility of anammox for nitrogen removal in R1.…”

Section: Stoichiometric Characteristics Of the Immobilized Anammox Resupporting

confidence: 54%

“…Then the ratio decreased below the theoretical value, ranging 1.01-1.32 with an average value of 1.15, meaning more consumption of ammonium than nitrite. This might be a result of the ammonia oxidation process using DO in the influent outcompeting nitrite oxidation at a limited DO level [22,24].…”

Section: Stoichiometric Characteristics Of the Immobilized Anammox Rementioning

confidence: 99%

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Enhancing Nitrogen Removal Performance in a Bioreactor Using Immobilized Anaerobic Ammonium Oxidation Sludge by Polyvinyl Alcohol-Sodium Alginate (PVA-SA)

Lu¹,

Ma²,

Liang³

et al. 2018

Pol. J. Environ. Stud.

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Anaerobic ammonium oxidation (anammox) is an efficient and promising pathway for nitrogen removal from wastewater, but its application is usually confined by the low growth rate and susceptibility to surroundings of anammox bacteria. In this study, cultured anammox sludge was immobilized using polyvinyl alcohol (PVA)-sodium alginate (SA) gel and put into a lab-scale column reactor at a packing ratio of 20%, and nitrogen removal performance was evaluated at two hydraulic retention times (HRTs). Anammox was rapidly initiated in the reactor, with ammonium and nitrite removal efficiency reaching 82.3% and 84.7% after an operation period of 10 d. Nitrogen removal efficiency declined greatly after the reduction of HRT from 24 h to 12 h, but then recovered quickly, with an average TN removal rate of 84.5% and 0.43 kg·m -3 ·d -1 achieved under the steady operational state. The immobilized anammox reactor performed significantly better and was more stable in nitrogen removal than that with anammox sludge inoculated directly, indicating the superiority of cell entrapment of anammox biomass in addition to its easy reservation. Nitrogen removal in the reactor increased after stable operation with the HRT. It has potential to apply immobilized anammox sludge entrapped by PVA-SA gel for the convenient establishment of an anammox reactor with stable and high nitrogen removal rates.

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“…2). A similar trend of increased nitrogen removal with increasing loading rate was also recorded in other immobilized anammox reactors [7,10,18,22].…”

Section: Resultssupporting

confidence: 56%

Section: Stoichiometric Characteristics Of the Immobilized Anammox Resupporting

confidence: 54%

Section: Stoichiometric Characteristics Of the Immobilized Anammox Rementioning

confidence: 99%

See 1 more Smart Citation

Enhancing Nitrogen Removal Performance in a Bioreactor Using Immobilized Anaerobic Ammonium Oxidation Sludge by Polyvinyl Alcohol-Sodium Alginate (PVA-SA)

Lu¹,

Ma²,

Liang³

et al. 2018

Pol. J. Environ. Stud.

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“…47 All natural polymeric gels are reported to have higher diffusivity 14 than synthetic gels. 31 There are previous works reporting that PVA-SA 38,48 and WPU 39 exhibit good diffusive properties three times higher than granular anammox. 35 Diffusivity of other synthetic polymers such as PEG, Na-CMC, and PCS has not been reported.…”

Section: Diffusivity and Growth Of Microorganismsmentioning

confidence: 97%

“…The growth of anammox bacteria is also affected by the initial inoculum present in the immobilized cells. The inoculation may be pure anammox culture or a mixed biomass . Dong et al .…”

Section: Characteristics Of Synthetic Polymeric Gelsmentioning

confidence: 99%

Research advances and challenges in anammox immobilization for autotrophic nitrogen removal

Manonmani

Joseph

2018

J of Chemical Tech & Biotech

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Application of the anaerobic ammonium oxidation (anammox) process using suspended or attached growth technology has limitations of slow growth rate such as biomass washout, and large footprint. This has led to the development of smaller, compact immobilized systems. In recent years, wastewater treatment using anammox immobilized cells has received much attention due to its advantages of high biomass content, retention of biomass by prevention of washout, good solid–liquid separation and lower toxicity to microorganisms. This article critically reviews the existing literature on autotrophic nitrogen removal using anammox bacteria in its immobilized form. Different methods of using immobilized anammox bacteria were identified. Characteristics of various polymeric gels such as solubility, biodegradability, stability, diffusivity and growth of biomass in the polymeric gel were studied. However, there is insufficient study of disposal methods and costs involved in anammox immobilization to guide future implementation of immobilized anammox technologies for autotrophic nitrogen removal. © 2018 Society of Chemical Industry

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Polymeric Hydrogels—A Promising Platform in Enhancing Water Security for a Sustainable Future

Loo

Vásquez

Athanassiou

et al. 2021

Adv Materials Inter

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anthropogenic activities that have led to saline intrusion and contamination of the existing freshwater sources, making the current approaches for water treatment even more difficult and costly. [2][3][4] This, in combination with the continuously rising global water demand, results in a rather pessimistic prediction that an additional 2000 billion m 3 of freshwater supply will be required by 2030 to meet the global demand, assuming no gains on the current state of water-production capacity and efficiency. [5,6] As the existing freshwater sources are being depleted, there is a growing need for utilization of a broader range of water sources beyond the conventional ones, that is, brackish water, seawater, wastewater, and atmospheric moisture. [7] On top of that, there is a call for a greater focus on enhancing water security, particularly for the poor and vulnerable populations, as water scarcity is more critical in these geographical regions due to the lack of access to conventional infrastructure and power sources to produce clean water. [1,8,9] This, in addition to the increasing intensity and frequency of climate-related disasters, present unique demands, such as simple and off-grid operations, for water technologies (WTs) that can be deployed to manage the constraints imposed by these circumstances. [10]

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Enrichment of ANAMMOX bacteria from conventional activated sludge entrapped in poly(vinyl alcohol)/sodium alginate gel

Cited by 79 publications

References 63 publications

Enhancing Nitrogen Removal Performance in a Bioreactor Using Immobilized Anaerobic Ammonium Oxidation Sludge by Polyvinyl Alcohol-Sodium Alginate (PVA-SA)

Enhancing Nitrogen Removal Performance in a Bioreactor Using Immobilized Anaerobic Ammonium Oxidation Sludge by Polyvinyl Alcohol-Sodium Alginate (PVA-SA)

Research advances and challenges in anammox immobilization for autotrophic nitrogen removal

Polymeric Hydrogels—A Promising Platform in Enhancing Water Security for a Sustainable Future

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