Elucidating salinity adaptation and shock loading on denitrification performance: Focusing on microbial community shift and carbon source evaluation

Zhang, Zengshuai; Guo, Yiding; Guo, Liang; Hu, Fawen; Zhao, Yangguo; Chen, Jin; She, Zhigang; Wang, Guangce

doi:10.1016/j.biortech.2020.123030

Cited by 41 publications

(11 citation statements)

References 44 publications

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“…It is in arid and semiarid areas that the filtering effects of salinization are especially pronounced ( Tang et al, 2012 ; Bencherif et al, 2015 ; Zhang et al, 2019 ; Kivistik et al, 2020 ). By inducing high osmotic pressure and intracellular ion concentrations, salinity is toxic to the growth of most freshwater bacterial individuals ( Rath et al, 2019a , b ) and their degradation ability ( Chen et al, 2020 ; Zhang et al, 2020 ). Therefore, salinization threatens bacterial abundance, diversity, and functional metabolism ( Yang et al, 2016 ; Lindsay et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Convergency and Stability Responses of Bacterial Communities to Salinization in Arid and Semiarid Areas: Implications for Global Climate Change in Lake Ecosystems

Jiang

Shao

et al. 2022

Front. Microbiol.

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Climate change has given rise to salinization and nutrient enrichment in lake ecosystems of arid and semiarid areas, which have posed the bacterial communities not only into an ecotone in lake ecosystems but also into an assemblage of its own unique biomes. However, responses of bacterial communities to climate-related salinization and nutrient enrichment remain unclear. In September 2019, this study scrutinized the turnover of bacterial communities along gradients of increasing salinity and nutrient by a space-for-time substitution in Xinjiang Uyghur Autonomous Region, China. We find that salinization rather than nutrient enrichment primarily alters bacterial communities. The homogenous selection of salinization leads to convergent response of bacterial communities, which is revealed by the combination of a decreasing β-nearest taxon index (βNTI) and a pronounced negative correlation between niche breadth and salinity. Furthermore, interspecific interactions within bacterial communities significantly differed among distinct salinity levels. Specifically, mutualistic interactions showed an increase along the salinization. In contrast, topological parameters show hump-shaped curves (average degree and density) and sunken curves (modularity, density, and average path distance), the extremums of which all appear in the high-brackish environment, hinting that bacterial communities are comparatively stable at freshwater and brine environments but are unstable in moderately high-brackish lake.

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Section: Introductionmentioning

confidence: 99%

Convergency and Stability Responses of Bacterial Communities to Salinization in Arid and Semiarid Areas: Implications for Global Climate Change in Lake Ecosystems

Jiang

Shao

et al. 2022

Front. Microbiol.

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“…The obtained results indicate that the changes of bacterial populations can be attributed not only to the salt concentration but also to the ammonia loading rate and alkalinity of the wastewater, in the case of nitrifying bacteria (Jeong et al, 2018), or to the type of carbon source used, in the case of denitrification (Zhang et al, 2020). In this latter case, microbial communities fed with complex organic carbon sources are more resistant to variable salinity conditions than those fed with simple substrates, such as acetate, because of their higher microbial richness and diversity (Zhang et al, 2020). As a general conclusion of these studies, microbial diversity decreases with increase in salinity (Jang et al, 2013;Wang et al, 2019;Yoshie et al, 2004) and this decrease starts at salt concentrations of 5-10 g NaCl/L (Chen et al, 2003;Jang et al, 2013).…”

Section: Nitrogen Removalmentioning

confidence: 92%

“…Similarly, to the nitrification process, several studies show that the denitrification process can take place under saline conditions achieving efficiencies and rates of nitrate removal comparable to those obtained at low salinity concentrations, when the salt concentration is gradually increased (Table 3.1). Moreover, Zhang et al (2020) reported that the denitrification process can withstand sudden increases of salinity from 0 to 50 g NaCl/L without diminishing its efficiency of removal and observed that this salinity shock can lead to punctual nitrite accumulations which disappear after a short time of operation. This high tolerance of denitrifying bacteria to saline conditions not only depends on the bacteria type but also on the organic carbon source used as the electron donor.…”

Section: Nitrogen Removalmentioning

confidence: 99%

Salinity effects on biological treatments

2021

Treatment and Valorisation of Saline Wastewater: Principles and Practice

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High salinity environments can cause the denaturation of microbial enzymes and the destruction of the cell structure. In order to withstand these effects, microorganisms are able to develop mechanisms to both maintain the osmotic pressure balance inside the cells with the bulk liquid and retain water. Organic matter and nitrogen can be removed from high salinity effluents by means of biological processes, once microorganisms are previously adapted to the salt presence, but phosphorus removal efficiency decreases notably under saline conditions, even applying long acclimation periods or using a marine inoculum. Sudden fluctuations of wastewater salt concentration are the worst scenario for biological treatment systems since they cause the loss of pollutant removal efficiency that cannot be avoided even using halophilic microorganisms.

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“…Several research works have focused on evaluating the effects of salinity on microbial communities operating in reactors where nitrogen compounds are removed and identified the microorganisms present under different salt concentrations (Table 3.2). The obtained results indicate that the changes of bacterial populations can be attributed not only to the salt concentration but also to the ammonia loading rate and alkalinity of the wastewater, in the case of nitrifying bacteria (Jeong et al, 2018), or to the type of carbon source used, in the case of denitrification (Zhang et al, 2020). In this latter case, microbial communities fed with complex organic carbon sources are more resistant to variable salinity conditions than those fed with simple substrates, such as acetate, because of their higher microbial richness and diversity (Zhang et al, 2020).…”

Section: Nitrogen Removalmentioning

confidence: 92%

“…The obtained results indicate that the changes of bacterial populations can be attributed not only to the salt concentration but also to the ammonia loading rate and alkalinity of the wastewater, in the case of nitrifying bacteria (Jeong et al, 2018), or to the type of carbon source used, in the case of denitrification (Zhang et al, 2020). In this latter case, microbial communities fed with complex organic carbon sources are more resistant to variable salinity conditions than those fed with simple substrates, such as acetate, because of their higher microbial richness and diversity (Zhang et al, 2020). As a general conclusion of these studies, microbial diversity decreases with increase in salinity (Jang et al, 2013;Yoshie et al, 2004) and this decrease starts at salt concentrations of 5-10 g NaCl/L (Chen et al, 2003;Jang et al, 2013).…”

Section: Nitrogen Removalmentioning

confidence: 92%

Treatment and Valorisation of Saline Wastewater: Principles and Practice

Río¹,

Corral²

2021

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Salinisation of freshwater occurs around the world due to anthropogenic activities associated with urban and industrial activities. These activities include groundwater abstraction for potable water supply to levels that favour seawater intrusions in coastal areas, the use of decalcifying products to prevent damage to appliances and the utilisation of salt media in industrial processes. These uses of water produce saline wastewater which is subjected to cleaning treatments that do not include salt removal. Thus, treated wastewater is reintroduced to the environment with salt levels that reduce its quality and make its further utilisation difficult. For this reason, an evaluation of the sources of wastewater with salt concentrations (e.g. NaCl) in the range from 1,300 (moderately saline) to 28,800 mg/L (very highly saline) will be provided in this section. Characteristics and compositions will be described for urban and industrial wastewater. The specific problems associated with the presence of salts will be presented and discussed.

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Elucidating salinity adaptation and shock loading on denitrification performance: Focusing on microbial community shift and carbon source evaluation

Cited by 41 publications

References 44 publications

Convergency and Stability Responses of Bacterial Communities to Salinization in Arid and Semiarid Areas: Implications for Global Climate Change in Lake Ecosystems

Convergency and Stability Responses of Bacterial Communities to Salinization in Arid and Semiarid Areas: Implications for Global Climate Change in Lake Ecosystems

Salinity effects on biological treatments

Treatment and Valorisation of Saline Wastewater: Principles and Practice

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