Aeration-induced CO2 stripping, instead of high dissolved oxygen, have a negative impact on algae–bacteria symbiosis (ABS) system stability and wastewater treatment efficiency

Zhang, Han; Gong, Wenyu; Bai, Langming; Chen, Rui; Zeng, Weichen; Yan, Zhongsen; Li, Guibai

doi:10.1016/j.cej.2019.122957

Cited by 59 publications

(17 citation statements)

References 36 publications

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“…It can be seen that, the DO started to increase with the microalgae production, and then became stable. This was an expected results since with the increase of algal biomass, the production of oxygen increased the DO 59 . Zhang et al also reported that, the DO increased with the increasing biomass.…”

Section: Resultssupporting

confidence: 61%

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Monitoring microalgal growth of Chlorella minutissima with a new all solid‐state contact nitrate selective sensor

Balkanli

Işıldak

İnan

et al. 2022

Biotechnology Progress

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As third generation feedstock, microalgae are microorganisms that can grow only in the optimum conditions. There are parameters including the concentration of macro and microelements in nutrient solution, pH, temperature and light intensity that have significant impact on microalgal growth. In recent years, various sensing devices have been developed for sensitive measurement of these parameters during microalgal growth. In this study, a new potentiometric nitrate selective sensor was developed to indicate the nitrate uptake of microalgae and the effect of nitrate nutrient on microalgal growth, specifically, and this sensor was successfully applied to determine nitrate concentration in medium during microalgal growth. Moreover, the effects of nitrate, carbonate and phosphate concentration in the growth medium on biomass production of Chlorella minutissima were investigated by using Box–Behnken design method, and optimum conditions were determined for the highest biomass production of microalgae. As a result of the experiments, it was seen that the highest C. minutissima production was achieved using the medium consist of 2.63 g/L NaNO3, 0.35 g/L Na2CO3 and 0.4 g/L KH2PO4. Statistically, it was observed that there was a proportional relationship between the microalgae production and investigated parameters such as carbon, nitrogen and phosphate amounts of culture mediums. The electrode showed a wide linear range between 1.0 × 10−1 and 5.0 × 10−5 M with a detection limit of the 5 × 10−6 M and the response time was found as 10 s. The results showed that developed nitrate selective sensor could be successfully applied for continuous measurement of nitrate in microalgal productions at reduced cost.

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Section: Resultssupporting

confidence: 61%

“…This was an expected results since with the increase of algal biomass, the production of oxygen increased the DO. 59 Zhang et al also reported that, the DO increased with the increasing biomass.…”

Section: Relation Between Microalgal Growth and Other Chemical Stimul...mentioning

confidence: 90%

Monitoring microalgal growth of Chlorella minutissima with a new all solid‐state contact nitrate selective sensor

Balkanli

Işıldak

İnan

et al. 2022

Biotechnology Progress

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“…Although effective nutrients supply can increase algae growth by up to 150% [71], the cost for nutrients raises additional concerns. Simultaneous nutrient-rich wastewater treatment and microalgae cultivation was recently investigated to provide a more sustainable option [72,73]. Nevertheless, CO2 loss and/or microalgae adaptation to higher N2 loading is still an open challenge.…”

Section: Algae Productionmentioning

confidence: 99%

Transformation technologies for CO2 utilisation: Current status, challenges and future prospects

Kamkeng

Wang

et al. 2021

Chemical Engineering Journal

264

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“…Generally, the pH of the water environment where consortia of algae and bacteria live increases with the decrease of CO 2 concentration. The reason why the ratio 5:1 of the consortium was the highest is that symbiosis enhances the ability of the consortium to absorb CO 2 49 . Similarly, Su et al 10 conducted a similar study on the highest nitrogen and phosphorus removal efficiencies observed with 5:1 for ratio of algae and sludge consortium, 91% and 93.5% respectively.…”

Section: Discussionmentioning

confidence: 99%

Convergent community structure of algal–bacterial consortia and its effects on advanced wastewater treatment and biomass production

Jia

et al. 2021

Sci Rep

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Microalgal-bacterial consortium is an effective way to meet increasingly stringent standards in wastewater treatment. However, the mechanism of wastewater removal effect has not been properly explained in community structure by phycosphere. And little is known about that the concept of macroecology was introduced into phycosphere to explain the phenomenon. In the study, the algal–bacterial consortia with different ratios of algae and sludge were cultured in same aerobic wastewater within 48 h in photobioreactors (PSBRs). Community structure at start and end was texted by metagenomic analysis. Bray–Curtis similarities analysis based on microbial community showed that there was obvious convergent succession in all consortia, which is well known as “convergence” in macroecology. The result showed that Bray–Curtis similarities at End (overall above 0.88) were higher than these at Start (almost less than 0.66). In terms of community structure, the consortium with 5:1 ratio at Start are the more similar with the consortia at End by which the maximum removal of total dissolved nitrogen (TDN, 73.69%), total dissolved phosphorus (TDP, 94.40%) and NH3-N (93.26%) in wastewater treatment process and biomass production (98.2%) higher than other consortia, according with climax community in macroecology with the highest resource utilization than other communities. Therefore, the macroecology can be introduced into phycosphere to explain the consortium for advanced wastewater treatment and optimization community structure. And the study revealed a novel insight into treatment effect and community structure of algal–bacterial consortia for advanced wastewater treatment, a new idea for to shortening the culture time of consortium and optimize predicting their ecological community structure and predicting ecological community.

show abstract

Aeration-induced CO2 stripping, instead of high dissolved oxygen, have a negative impact on algae–bacteria symbiosis (ABS) system stability and wastewater treatment efficiency

Cited by 59 publications

References 36 publications

Monitoring microalgal growth of Chlorella minutissima with a new all solid‐state contact nitrate selective sensor

Monitoring microalgal growth of Chlorella minutissima with a new all solid‐state contact nitrate selective sensor

Transformation technologies for CO2 utilisation: Current status, challenges and future prospects

Convergent community structure of algal–bacterial consortia and its effects on advanced wastewater treatment and biomass production

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