Substrate uptake, loss, and reserve in ammonia-oxidizing bacteria (AOB) under different substrate availabilities

Keerio, Hareef Ahmed; Bae, Wookeun; Park, JunMin; Kim, Moonil

doi:10.1016/j.procbio.2019.12.023

Cited by 26 publications

(18 citation statements)

References 23 publications

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“…The oxygen uptake rate was almost proportional to the TAN removal rate, of which the ratio taken from four sample measurements was~3.9. This value was a little higher than the theoretical value (3.4), indicating that some experimental error had occurred [14]. DO consumption by endogenous respiration was also taking place, accounting for approximately 3% of the total.…”

Section: Batch Experiments At the Adapted Ammonium Concentrationmentioning

confidence: 62%

“…Reactor A (R(A)) was run at pH 8, while Reactor B (R(B)) at pH 7.2. The synthetic wastewater was prepared using the mineral medium [5,13,14] ( Table 1). The concentration of mineral medium was different due to the different feed concentrations.…”

Section: Ammonium Oxidizing Bacteria (Aob) Cell Culture and Mineral Mmentioning

confidence: 99%

“…Two CSTRs with 5-liter volume were operated for 588 days by limiting the DO value to achieve nitrification [14]. The DO concentration for R(A) was~1 mg/L and R(B) was~1.5 mg/L.…”

Section: Stable and Long-term Operation Of Continuous Stirred Tank Rementioning

confidence: 99%

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Experimental Investigation of Substrate Shock and Environmental Ammonium Concentration on the Stability of Ammonia-Oxidizing Bacteria (AOB)

Keerio

Bae

2020

Water

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A wastewater treatment plant (WWTP) frequently encounters fluctuation in ammonium concentration or flow rate (Q), which may affect the stability of ammonium oxidizing bacteria (AOB). In this study, two continuous stirred tank reactors (CSTRs) were operated for 588 days and ammonium concentration was varied at various steady-state conditions. There was no inhibition observed in CSTR operation and AOB acclimated once at a certain ammonium concentration. Cells at an acclimated steady-state concentration (200 mgTAN/L from R(A) and 1000 mgTAN/L from R(B)) were extracted to perform a batch test at operating conditions, and self-inhibition behavior was observed in the batch reaction. In CSTR operation, the environmental ammonium concentration was varied and the specific oxygen uptake rate (SOUR) value was estimated from daily profile data and compared with batch reaction. In the CSTR operation as a substitute for self-inhibition, the SOUR was shifted towards the maximum specific oxygen uptake rate (SOURmax) and no self-inhibition was observed. For further justification of the CSTR’s stability, several total ammonium nitrogen (TAN) concentrations (range from ~−106 to ~+2550 mgTAN/L) were directly added to interrupt the stability of the process. As a substitute for any effect on the SOUR, the CSTRs were recovered back to the original stable steady-state conditions without varying the operational conditions.

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Section: Batch Experiments At the Adapted Ammonium Concentrationmentioning

confidence: 62%

Section: Ammonium Oxidizing Bacteria (Aob) Cell Culture and Mineral Mmentioning

confidence: 99%

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Experimental Investigation of Substrate Shock and Environmental Ammonium Concentration on the Stability of Ammonia-Oxidizing Bacteria (AOB)

Keerio

Bae

2020

Water

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“…As canal water crosses the urban area high oxygen concentration was observed. The reason may be the activities of microbes were decreased such as Ammonia Oxidizing Bacteria (AOB) (Keerio & Bae 2020;Keerio et al 2020a). However, regarding the plant and crops DO between 3.5 to 6.5 mg/L is sufficient for high corn yield (Yafuso & Fisher 2017).…”

Section: Dissolved Oxygen (Do)mentioning

confidence: 99%

Water quality analysis of old and new Phuleli Canal for irrigation purpose in the vicinity of Hyderabad, Pakistan

Panhwar

Keerio

et al. 2022

Water Practice and Technology

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Irrigation-water quality plays an important role in agriculture productivity. In this study, water quality of the old and new Phuleli canal located in Hyderabad, Pakistan, was characterized for irrigation purpose. Water samples were collected from four different locations of each old and new Phuleli canal. Twelve different irrigation-water quality standards were assessed under the study: pH, Electricity Conductivity, Biochemical Oxygen Demand (BOD), Total Dissolved Solids, Chemical Oxygen Demand (COD), Dissolved Oxygen, Calcium, Magnesium, Sodium, Potassium, Sodium adsorption ratio, Fecal Coliforms. The results showed that the Electricity Conductivity ranges from 910–3,090 MS/cm, Potassium 13–112 mg/l, BOD 61–285 mg/l, COD 97–361 mg/l and Fecal Coliforms 400–2,350 MPN/100 ml concentrations in water of both canals were higher than the National Environmental Quality Standards permissible limits. It was found that the water quality parameters were higher than the permissible pollution level of canal water for the use of irrigation in agriculture.

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“…An estimated 31% of the urea applied in tropical and temperate soils will be lost, depending on the application mode, environmental/climatic conditions, and soil types [13]. The amount of NH 3 -N and N 2 O-N loss is mostly affected by soil properties such as pH, buffering capacity, cation exchange capacity, and organic matter content, along with N source and rate [14], fertilization time and placement of urea [15], and nitrification and denitrification processes in soil [16,17]. However, it is a challenge to minimize N losses to increase the NUE of applied urea.…”

Section: Introductionmentioning

confidence: 99%

Gaseous Nitrogen Losses from Tropical Soils with Liquid or Granular Urea Fertilizer Application

et al. 2021

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Gaseous loss of N leads to lower nitrogen use efficiency (NUE) of applied urea and N content of the soil. This laboratory study was conducted to compare the nitrogen losses from two tropical soil series (Bungor sandy clay loam and Selangor clay) incubated with either liquid urea (LU) or granular urea (GU) at 0, 300, 400, or 500 mg/kg of soil for thirty days. The NH3 volatilization, N2O emission, and N content in the soils were measured throughout the incubation period. For the same application rate, the total NH3 volatilization loss was higher in GU-treated soils than the LU-treated soils. NH3 volatilization loss continued up to the 15th day in the Selangor soil, while in the Bungor soil series it continued up to the 26th day. Higher amounts of N2O emissions were recorded in GU-treated soils than the LU-treated soils, and N2O emission increased with increasing rate of GU and LU applications in both soils. The N2O emission was higher only in the first few days and then tapered off at the seventh and eighth day in Bungor and Selangor soil series, respectively. The total N2O emission was higher in the Selangor soil series than that of Bungor soil series. The total N content that remained in the LU-treated soils after 30 days of incubation was higher than the GU-treated soils. The total N loss from applied urea was higher in the sandy clay loam Bungor soils than that of clayey Selangor soil series. The results suggest that the LU may be a better N fertilizer source than GU due to lower N loss from NH3 volatilization and N2O emission.

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Substrate uptake, loss, and reserve in ammonia-oxidizing bacteria (AOB) under different substrate availabilities

Cited by 26 publications

References 23 publications

Experimental Investigation of Substrate Shock and Environmental Ammonium Concentration on the Stability of Ammonia-Oxidizing Bacteria (AOB)

Experimental Investigation of Substrate Shock and Environmental Ammonium Concentration on the Stability of Ammonia-Oxidizing Bacteria (AOB)

Water quality analysis of old and new Phuleli Canal for irrigation purpose in the vicinity of Hyderabad, Pakistan

Gaseous Nitrogen Losses from Tropical Soils with Liquid or Granular Urea Fertilizer Application

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