Effects of Ca2+ Concentration on Anaerobic Ammonium Oxidation Reactor Microbial Community Structure

Ma, Xueyan; Jin, Yanchao; Zhang, Wenjie

doi:10.3390/w11071341

Cited by 8 publications

(5 citation statements)

References 35 publications

(32 reference statements)

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“…Denaturing gradient gel electrophoresis (DGGE) was carried out on CMBR sludge samples to characterize microbial populations. A DGGE map can distinguish microorganisms at the genus level; moreover, bright and faint bands in the gel can be interpreted as dominant and inferior microorganism populations, respectively [26]. As shown in Figure 5a, the dominant CMBR microorganism populations are represented by bands 4 and 5, with a total share of 52% (Figure 5c).…”

Section: Microbial Diversity Analysismentioning

confidence: 99%

Treatment of High-Concentration Wastewater from an Oil and Gas Field via a Paired Sequencing Batch and Ceramic Membrane Reactor

Yuan

Jin

Zhang

2020

IJERPH

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A sequencing batch reactor (SBR) and a ceramic membrane bioreactor (CMBR) were used in conjunction (SBR+CMBR) to treat high-concentration oil and gas field wastewater (HCOGW) from the China National Offshore Oil Corporation Zhanjiang Branch (Zhanjiang, Guangdong, China). The chemical oxygen demand (COD) and the oil concentrations in the wastewater were 20,000–76,000 and 600–2200 mg/L, respectively. After the SBR+CMBR process, the effluent COD and oil content values were less than 250 mg/L and 2 mg/L, respectively, which met the third level of the Integrated Wastewater Discharge Standards of China (GB8978-1996). Through microbiological analysis, it was found that the CMBR domesticated a previously unreported functional microorganism (JF922467.1) that successfully formed a new microbial ecosystem suitable for HCOGW treatment. In conjunction with the SBR process, the CMBR process effectively reduced pollutant concentrations in HCOGW. Moreover, economic analyses indicated that the total investment required to implement the proposed infrastructure would be approximately 671,776.61 USD, and the per-unit water treatment cost would be 1.04 USD/m3.

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Section: Microbial Diversity Analysismentioning

confidence: 99%

Treatment of High-Concentration Wastewater from an Oil and Gas Field via a Paired Sequencing Batch and Ceramic Membrane Reactor

Yuan

Jin

Zhang

2020

IJERPH

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“…Currently, seven genera and 26 species of Candidatus (Brocadia, Kuenenia, Jettenia, Scalindua, Anammoxoglobus, Anammoximicrobium, and Brasilis) have been identified [26]. Details on the diversity of anammox microorganisms are presented in Table 1 [27][28][29]. Ca.…”

Section: Anammox Microorganisms and Their Biochemical Reaction Mechanismmentioning

confidence: 99%

“…The experiments were designed accordingly. After a period of culture, the resulting 28 N2, 29 N2, and 30 N2 concentrations were measured by a membrane-sampling mass spectrometer, isotope ratio mass spectrometer, or gas chromatography-mass spectrometry. Through calculation, we can judge whether there is an anammox reaction and its reaction rate [21].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Contribution Rate of Anammox in Different Systems and Its Relationship with Environmental Factors

Cui¹,

Zhang

2023

Water

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Anammox bacteria can remove ammonium directly, which is different from what was previously believed. This is an important process for the global nitrogen cycle. Anammox bacteria were first identified in sewage treatment systems and were later proven to exist widely in natural ecosystems. To better understand the relationship between the anammox reaction and different systems, and to maintain the stability of the nitrogen cycle, anammox functional microorganisms found in different natural environments were summarized. In addition, anammox nitrogen production rate and the contribution of anammox to nitrogen were discussed under different ecological environments. A literature analysis showed that the contribution rate of nitrogen removal of anammox was the highest in the Terrestrial ecosystem, up to 87.5%. The Terrestrial ecosystem is more likely to form an anoxic or even anaerobic environment conducive to anaerobic ammoxidation. Therefore, the control of DO is an important factor in the activity of anaerobic ammoxidation. Other environmental factors affecting the contribution of anammox to nitrogen removal include temperature, pH, organic matter content, inorganic nitrogen concentration, and salinity. However, the dominant influencing factors of anammox reactions in different ecosystems are evidently different. Therefore, the mechanism of the impact of different environmental factors on the anaerobic ammonia oxidation process is necessary to discuss. This provides a scientific basis for the global nitrogen cycle and is of great significance to improve nitrogen’s biogeochemical cycle in the ecosystem.

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“…Finally, the gene sequence was compared in the GenBank to analyze the diversity of samples (Ma et al, 2019).…”

Section: Sludge Sample Analysismentioning

confidence: 99%

Rapid start-up of anammox reactor using granular sludge supported on activated carbon

2020

Global NEST: The International Journal

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<p>The long start-up time and high demand of anaerobic ammonium oxidation (anammox) limit the practical applications of the anammox process. In this study, granular sludge supported on activated carbon (AC) was used as seed sludge. The start-up time of the reactor was substantially shortened, and the expanded granular sludge bed (EGSB) reactor could be started quickly (in only 17 days). The nitrogen load rate (NLR) increased from 0.61 kg m-3 d-1 to 1.19 kg m-3 d-1, the removal rate of total nitrogen (TN) increased from 78.04% to83.15%, and the final ratio NH4+: NO2-: NO3- was 1:1.33:0.30. Moreover, in the gas analysis phase, the reactor load could be further improved and increased to 1.70 kg m-3 d-1 from the 18th–22nd day, and the reactor run stably. During this period, N2O and CO2 production was 0.8% and 0.02%, respectively. According to the analysis of microorganisms, the main functional microorganism in the reactor was Candidatus Kuenenia. The content of Candidatus Kuenenia increased by 5.45% after the reactor was started successfully. The color of sludge was brick red. This showed that the operation mode and inoculated sludge employed in this study are highly effective for the fast start-up of an EGSB reactor.</p>

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Effects of Ca2+ Concentration on Anaerobic Ammonium Oxidation Reactor Microbial Community Structure

Cited by 8 publications

References 35 publications

Treatment of High-Concentration Wastewater from an Oil and Gas Field via a Paired Sequencing Batch and Ceramic Membrane Reactor

Treatment of High-Concentration Wastewater from an Oil and Gas Field via a Paired Sequencing Batch and Ceramic Membrane Reactor

Nitrogen Contribution Rate of Anammox in Different Systems and Its Relationship with Environmental Factors

Rapid start-up of anammox reactor using granular sludge supported on activated carbon

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