The inhibition of the Anammox process: A review

Jin, Ren‐Cun; Yang, Guoguang; Yu, Jinjin; Zheng, Ping

doi:10.1016/j.cej.2012.05.014

Cited by 778 publications

(226 citation statements)

References 119 publications

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“…Previous studies have reported that soil pH was a key factor influencing the activity of anammox bacteria and shaping the anammox bacterial community structure (He et al, 2012;Bai et al, 2015;Yang et al, 2015). Studies on bioreactors have also suggested that the physiological pH for anammox bacteria was within the range of 6.5e9.0 and the optimum pH was around 8 (Strous et al, 1999;Egli et al, 2001;Jin et al, 2012). In this study, the BH (pH 8.00e8.64) and LZ (pH 6.78e7.23) soils performed much higher anammox activity than the TY (pH 5.97e6.01) soil, which further indicated that soil pH was crucial in determining anammox activity and that anammox bacteria are more adapted to neutral and relatively alkaline conditions than relatively acidic conditions.…”

Section: Linkage Between Anammox Activity Bacterial Abundance and Somentioning

confidence: 99%

“…Studies on wastewater treatment reactors have recognized pH and salinity as important factors influencing activity of anammox bacteria (Jin et al, 2012). Neutral to alkaline conditions were found to be more suitable for the growth of anammox bacteria in bioreactors, but the anammox activity can be inhibited by large amounts of saline wastewater (Strous et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Activity, abundance and community structure of anammox bacteria along depth profiles in three different paddy soils

Bai

et al. 2015

Soil Biology and Biochemistry

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a b s t r a c tAnaerobic ammonium oxidation (anammox) is a globally important nitrogen-cycling process mediated by specialized microbes, and has been demonstrated to be ubiquitous in anoxic natural settings and bioreactors. However, our knowledge of its prevalence in different paddy soil types and along the depth profiles remains largely undocumented. Here, mesocosm incubations were constructed to investigate the activity and community compositions of anammox bacteria across different depth layers of three different paddy soils. 15N tracer experiments showed that anammox rates were prevalent in almost all depth layers of an inceptisol (Binhai, BH) and an oxisol (Leizhou, LZ), but was absent in an ultisol (Taoyuan, TY). The functional gene hzsB of anammox bacteria was only detected in BH and LZ soil profiles with detected anammox activity. Anammox accounted for 0.4%e12.2% of the total N 2 production, and anammox rates were 0.02e0.77 nmol N g À1 dry soil h À1 and significantly correlated with soil pH and electric conductivity. Anammox activity and abundance of hzsB genes were significantly lower in the surface soil layers (0e5 cm) than in the sub-surface soil layers (20e60 cm). Candidatus Brocadia, Candidatus Kuenenia and Candidatus Jettenia were detected by cloning and sequencing, with Candidatus Brocadia being dominant in all the three soils and Candidatus Jettenia being more frequently detected in the LZ soil. The operational taxonomic unit number and diversity indices of anammox bacterial 16S rRNA gene increased with soil depth. Our results demonstrate that anammox is more common and active in alkaline soils than in acidic soils, in deep paddy soil layers than in surface soil layers, and that anammox activities are likely to be regulated by soil chemical properties such as pH, salinity and redox potential.

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Section: Linkage Between Anammox Activity Bacterial Abundance and Somentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Activity, abundance and community structure of anammox bacteria along depth profiles in three different paddy soils

Bai

et al. 2015

Soil Biology and Biochemistry

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“…The high nitrogen removal efficiency process is known as anammox. For several years since this process was established, it had been believed to require high nitrogen loading, high temperature and anaerobic conditions (Jin et al, 2012). Recent studies have demonstrated that anammox bacteria can grow at room temperature (Vázquez-Padín et al, 2009), at low nitrogen compounds loading (NH4-N: 2.3 ±0.38 g/m 3 , NO3: 1.47 ±1.00 g/m 3 , NO2: 2.1 ±0.63 g/m 3 , Pathak et al, 2007) and at high dissolved oxygen concentration: 5-8 g O2 per 1 m 3 (Liu et al, 2008).…”

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confidence: 99%

Effect of thickness of textile filter on organic compounds and nutrients removal efficiency at changeable wastewater surface level

Spychała

Lucyk²

2015

Nauka Przyr. Technol.

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Summary. The aim of the study was to identify the innovative filters' (textile filters for wastewater treatment) thickness impact on dissolved compounds removal efficiency and related: biomass concentration, hydraulic capacity and hydraulic retention time. The study was conducted on septic tank effluent (STE) which was filtered at changeable wastewater surface between 7 cm and 20 cm of height under hydrostatic pressure. The research was performed on filters of thickness: 1.8 mm, 3.6 mm and 7.2 mm. The thinner the filter layer, the lower the total solids content and the higher the hydraulic capacity. The thicker the filter layer, the higher the dissolved compounds removal efficiency. The most efficient in removal were the thickest (eight-layers) filters. The calculated hydraulic retention times were: 0.5, 1.1 and 3.3 h for two-, four-and eight-layer filters, respectively.

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“…This would indicate that these salinity conditions are optimal to promote the biofilm formation. The increase of k3 value when the system was operated at 15 g NaCl/L (run 7) is probably due to the inhibitory effect of NaCl on the Anammox activity [33]. Dapena-Mora et al [30] found that NaCl concentrations higher than 8.8 g/L could have an inhibitory effect over the Anammox activity when the biomass was not acclimatised.…”

Section: Resultsmentioning

confidence: 99%

Influence of the shear stress and salinity on Anammox biofilms formation: modelling results

Fernández

Bravo

Mosquera-Corral

et al. 2014

Bioprocess Biosyst Eng

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Anammox biomass has a long duplication time and low yield, thus the process must be operated in reactors with good sludge retention, such as biofilm systems. Therefore, it would be important to research the ability of Anammox biomass to form biofilms under different conditions. The effects of shear stress and salinity (NaCl and CaCl2) on Anammox biofilm formation were studied. Anammox bacteria showed good attachment capacity, with an initial adhesion phase lasting for 5-7 days at the different flow rates tested (Reynolds numbers 54, 63, 188 and 400). A four-parameter model was developed and the experimental data fitted well into the model. The pre-sence of 5 g/L of each of the two salts favoured the formation of Anammox biofilm. The effects of CaCl2 were stronger than those caused by NaCl. 15 g/L of NaCl was detrimental for the biofilm, probably due to an inhibitory effect.

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The inhibition of the Anammox process: A review

Cited by 778 publications

References 119 publications

Activity, abundance and community structure of anammox bacteria along depth profiles in three different paddy soils

Activity, abundance and community structure of anammox bacteria along depth profiles in three different paddy soils

Effect of thickness of textile filter on organic compounds and nutrients removal efficiency at changeable wastewater surface level

Influence of the shear stress and salinity on Anammox biofilms formation: modelling results

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