Performance of three microalgal strains in biogas slurry purification and biogas upgrade in response to various mixed light-emitting diode light wavelengths

Zhao, Yongjun; Sun, Shiqing; Hu, Chenyang; Zhang, Hui; Xu, Jie; Ping, Lifeng

doi:10.1016/j.biortech.2015.03.130

Cited by 98 publications

(52 citation statements)

References 21 publications

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“…As shown in Table , the maximum biomass in D6 (COD = 3122.5 mg L −1 ) decreased to 1.25 ± 0.11 g L −1 , at which microalgae cannot grow well. This finding is mainly due to the fact that C. vulgaris has difficulty surviving in wastewater containing excessive high‐strength organics …”

Section: Resultsmentioning

confidence: 99%

“…and Chlorella pyrenoidosa , respectively. Zhao et al evaluated the potential of a combined anaerobic process and Scenedesmus obliquus cultivation for nutrient removal from anaerobic effluents and for biogas upgrading. The results showed high removal efficiencies for main nutrients; hence, combined wastewater treatment and microalgal cultivation could be an optimal alternative treatment for nutrient removal.…”

Section: Introductionmentioning

confidence: 99%

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Nutrient removal and biogas upgrading by microalgal strains cultured in anaerobic digested starch wastewater

Cheng

Zhang

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND In this study, the microalga Chlorella vulgaris (FACHB‐38) was cultivated in pure (3122.5 mg L−1 chemical oxygen demand (COD)) and diluted anaerobic digested starch wastewater (ADSW; 313.2, 622.8, 935.7, 1248.5, and 1558.9 mg L−1 COD). This study mainly aimed to compare algal growth and tolerance with various dilutions of ADSW, as well as determine nutrient removal efficiency and role of biogas upgrade. RESULTS Chlorella vulgaris cultured in ADSW with 935.7 mg L−1 COD yielded a maximum total biomass of 3.39 ± 0.27 g L−1 (dry weight) and pollutant removal efficiencies of 79.04% ± 5.71% COD and 73.19% ± 6.98% total nitrogen (TN). The contents of C, N, and P in biomass remained constant at 48.93–50.12%, 8.76–9.94%, and 0.74–0.98%, respectively, among all dilutions. High total phosphorus (TP) removal efficiency was observed in treatments with 1248.5–1558.9 mg L−1 COD. The most appropriate dilutions for biogas upgrade were 935.7 and 1248.5 mg L−1 COD. CONCLUSION The optimal effect of nutrient removal and biogas upgrading can be obtained by appropriate control of ADSW dilution in influents. © 2016 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nutrient removal and biogas upgrading by microalgal strains cultured in anaerobic digested starch wastewater

Cheng

Zhang

et al. 2016

J of Chemical Tech & Biotech

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“…The biomass productivity (P, g L −1 d −1 ) of the microalgae or microalgal symbionts was calculated by Equation (Zhao et al., ).

P = \frac{{DW}_{i} - {DW}_{0}}{t_{i} - t_{0}}

where DW i represents the biomass concentration at time t i , g/L; DW 0 represents the initial biomass concentration at t 0 , g/L.…”

Section: Methodsmentioning

confidence: 99%

Influence of three microalgal‐based cultivation technologies on different domestic wastewater and biogas purification in photobioreactor

Sun

Gao

et al. 2019

Water Environment Research

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To investigate the effects of different microalgae and culture methods on the purification of domestic wastewater and biogas, Chlorella vulgaris and Scenedesmus obliquus were selected. Three different culture methods (monoculture, microalgal–fungi cocultivation, and microalgal‐activated sludge cocultivation) were used to remove nutrients from four different domestic wastewaters and remove CO2 from raw biogas in a photobioreactor. The results show that the effluent from the centrate of pretreated urban wastewater (WW4) achieved the highest nutrient and CO2 removal efficiency. Cocultivation of C. vulgaris and activated sludge achieved the highest COD, TP, and CO2 removal efficiencies of 79.27%, 81.25%, and 60.39% with WW4, respectively. Cocultivation of C. vulgaris and fungi achieved the highest TN removal efficiency of 78.46% with WW4. The contents of C, N, and P in the microalgal‐activated sludge symbiont after treatment exceeded 50%, 8%, and 0.8%, respectively. Highly economically efficient energy consumption was achieved with WW4 for both C. vulgaris and S. obliquus. Microalgal‐activated sludge cocultivation was identified as the optimal option for the simultaneous purification of wastewater and biogas based on its high pollution and CO2 removal efficiency. This provides a reference for the microalgal‐based purification of actual domestic wastewater and raw biogas. Practitioner points Nutrient and CO2 were efficiently removed by C. vulgaris with activated sludge. CO2 was removed up to 60.4% and was economically viable. Cocultivation of C. vulgaris and fungi could achieve the highest TN removal with WW4.

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“…Simultaneously, biogas slurry can supply high concentrations of nutrients such as carbon, nitrogen, and phosphorus to produce high microalgae biomass for the production of biochemicals and biofuels 11 . Bhatnagar et al .…”

Section: Introductionmentioning

confidence: 99%

“…The present study therefore focuses on microalgal strain growth, biogas upgrade, and biogas slurry nutrient reduction using five selected microalgae strains in three cultivation treatments. These five strains used in this work were selected on account of their high growth rates (in the range of 0.327–0.451 d −1 ) and strong nutrient removal ability (more than 60% removal of COD) in wastewater on the basis of our previous research 11 . In the first step, we select the optimal microalgal strains in terms of growth rate and mean daily productivity and then choose the optimum cultivation technology.…”

Section: Introductionmentioning

confidence: 99%

Screening of microalgae for integral biogas slurry nutrient removal and biogas upgrading by different microalgae cultivation technology

Wang¹,

Bao

Cao

et al. 2017

Sci Rep

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The microalgae-based technology has been developed to reduce biogas slurry nutrients and upgrade biogas simultaneously. In this work, five microalgal strains named Chlorella vulgaris, Scenedesmus obliquus, Selenastrum capricornutum, Nitzschia palea, and Anabaena spiroides under mono- and co-cultivation were used for biogas upgrading. Optimum biogas slurry nutrient reduction could be achieved by co-cultivating microalgae (Chlorella vulgaris, Scenedesmus obliquus, and Nitzschia palea) with fungi using the pelletization technology. In addition, the effects of different ratio of mixed LED light wavelengths applying mixed light-emitting diode during algae strains and fungi co-cultivation on CO2 and biogas slurry nutrient removal efficiency were also investigated. The results showed that the COD (chemical oxygen demand), TN (total nitrogen), and TP (total phosphorus) removal efficiency were 85.82 ± 5.37%, 83.31 ± 4.72%, and 84.26 ± 5.58%, respectively at red: blue = 5:5 under the co-cultivation of S. obliquus and fungi. In terms of biogas upgrading, CH4 contents were higher than 90% (v/v) for all strains, except the co-cultivation with S. obliquus and fungi at red: blue = 3:7. The results indicated that co-cultivation of microalgae with fungi under mixed light wavelengths treatments was most successful in nutrient removal from wastewater and biogas upgrading.

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Performance of three microalgal strains in biogas slurry purification and biogas upgrade in response to various mixed light-emitting diode light wavelengths

Cited by 98 publications

References 21 publications

Nutrient removal and biogas upgrading by microalgal strains cultured in anaerobic digested starch wastewater

Nutrient removal and biogas upgrading by microalgal strains cultured in anaerobic digested starch wastewater

Influence of three microalgal‐based cultivation technologies on different domestic wastewater and biogas purification in photobioreactor

Screening of microalgae for integral biogas slurry nutrient removal and biogas upgrading by different microalgae cultivation technology

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