Nutrient recovery from industrial wastewater as single cell protein by a co-culture of green microalgae and methanotrophs

Rasouli, Zahra; Valverde-Pérez, Borja; D’Este, Martina; Francisci, Davide De; Angelidaki, Irini

doi:10.1016/j.bej.2018.03.010

Cited by 119 publications

(58 citation statements)

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“…in tannery wastewater. Better growth performance of the consortium in PWW and MWW may be attributed to higher amount of inorganic nutrients (total nitrogen and phosphate) primarily supporting growth of the microalgae 19,20 and higher amount of COD primarily favoring growth of the bacteria 21 in comparison to TWW and LWW. Microalgae assimilates inorganic nitrogen sources into organic macromolecules and genetic materials and hence, critically essential for their growth 22 .…”

Section: Resultsmentioning

confidence: 99%

“…resulted in 91.16% nitrogen and 88.88% phosphate removal 18 . COD removal efficiency of ~91% was achieved when microalgae-bacteria consortia was cultivated in wastewater from potato processing plant 21 , dairy industry 26 and municipality 27 . While, a commendable removal efficiency of both the heavy metals (61.95% for Ni and 45.71% for Cr) was observed in PWW, the same was lower in LWW (Table 2).…”

Section: Resultsmentioning

confidence: 99%

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Sustainable production of bio-crude oil via hydrothermal liquefaction of symbiotically grown biomass of microalgae-bacteria coupled with effective wastewater treatment

Goswami

Makut

Das

2019

Sci Rep

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The study demonstrates a sustainable process for production of bio-crude oil via hydrothermal liquefaction of microbial biomass generated through co-cultivation of microalgae and bacteria coupled with wastewater remediation. Biomass concentration and wastewater treatment efficiency of a tertiary consortium (two microalgae and two bacteria) was evaluated on four different wastewater samples. Total biomass concentration, total nitrogen and COD removal efficiency was found to be 3.17 g L−1, 99.95% and 95.16% respectively when consortium was grown using paper industry wastewater in a photobioreactor under batch mode. Biomass concentration was enhanced to 4.1 g L−1 through intermittent feeding of nitrogen source and phosphate. GC-MS and FTIR analysis of bio-crude oil indicates abundance of the hydrocarbon fraction and in turn, better oil quality. Maximum distillate fraction of 30.62% lies within the boiling point range of 200–300 °C depicting suitability of the bio-crude oil for conversion into diesel oil, jet fuel and fuel for stoves.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Sustainable production of bio-crude oil via hydrothermal liquefaction of symbiotically grown biomass of microalgae-bacteria coupled with effective wastewater treatment

Goswami

Makut

Das

2019

Sci Rep

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“…At the same time, the oxygen released by algae photosynthesis can promote the metabolism of aerobic bacteria. Algae cells use light energy as energy; consume a large amount of N, P, and other nutrients in the sewage; and synthesize organic substances into organic matter to purify the water source (Du, Harata, & Li, ; Rasouli, Valverde‐Pérez, D'Este, Francisci, & Angelidaki, ). It can be seen from Figures that the removal effect of the algae mixed culture on the pollutants is better than that under the single condition of the microalgae.…”

Section: Resultsmentioning

confidence: 99%

Nutrient and heavy metal removal from piggery wastewater and CH₄ enrichment in biogas based on microalgae cultivation technology under different initial inoculum concentration

Guo

Guan

Sun

et al. 2019

Water Environment Research

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Three microalgae-based treatment technologies were applied for removing nutrients in piggery wastewater and CO 2 in biogas simultaneously. Chlorella vulgaris (C. vulgaris), Scenedesmus obliquus (S. obliquus), and Neochloris oleoabundans (N. oleoabundans) were selected for mono-cultivation or co-cultivation with fungi or activated sludge. The effects of initial inoculum concentration (low of 62.06 ± 6.23 mg/L, medium of 121 ± 9.34 mg/L, and high of 180 ± 12.78 mg/L) of microalgae/algal symbiont on the pollutant removal efficiency were evaluated. The results showed that cultivation of S. obliquus with activated sludge had a relatively high CO 2 and nutrients removal efficiency at a medium concentration of initial inoculum. The highest removal efficiency of total organic carbon, total nitrogen, and total phosphorus in piggery wastewater was 87.29%, 87.26%, and 90.17% by co-cultivation of S. obliquus with activated sludge. The highest CO 2 removal of 64.28% could be achieved under co-cultivation of S. obliquus and fungi at medium initial inoculum concentrations. This work will be helpful to promote the study of microalgae-based biogas upgrading and piggery wastewater purification. © 2019 Water Environment Federation • Practitioner points• Nutrient and CO 2 were efficiently removed in moderate microalgal initial inoculum. • Scenedesmus obliquus-activated sludge cultivation achieved the highest nutrient removal. • Co-cultivation of S. obliquus and fungi showed the highest CO 2 removal. • Zinc was removed efficiently in high microalgal initial inoculum. • Chlorella vulgaris/S. obliquus-activated sludge performed economically.

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“…Following the principles that drive the natural consortia, different synthetic methanotroph–photoautotroph (e.g., cyanobacteria or microalgae) cocultures have been demonstrated to simultaneously convert both CH 4 and CO 2 into microbial biomass without external oxygen supply (Badr et al, 2019; Hill et al, 2017; Rasouli et al, 2018; van der Ha et al, 2012). The biogas‐derived coculture biomass could be further processed to produce biofuels (such as biodiesel), directly used as single‐cell protein for animal feed supplement, or used as feedstock to produce bioplastics.…”

Section: Introductionmentioning

confidence: 99%

Fast and easy quantitative characterization of methanotroph–photoautotroph cocultures

Badr

Whelan

et al. 2020

Biotech & Bioengineering

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Recent research has demonstrated that synthetic methanotroph–photoautotroph cocultures offer a highly promising route to convert biogas into value‐added products. However, there is a lack of techniques for fast and accurate characterization of cocultures, such as determining the individual biomass concentration of each organism in real‐time. To address this unsolved challenge, we propose an experimental–computational protocol for fast, easy, and accurate quantitative characterization of the methanotroph–photoautotroph cocultures. Besides determining the individual biomass concentration of each organism in the coculture, the protocol can also obtain the individual consumption and production rates of O2 and CO2 for the methanotroph and photoautotroph, respectively. The accuracy and effectiveness of the proposed protocol was demonstrated using two model coculture pairs, Methylomicrobium alcaliphilum 20ZR–Synechococcus sp. PCC7002 that prefers high pH high salt condition, and Methylococcus capsulatus–Chlorella sorokiniana that prefers low salt and neutral pH medium. The performance of the proposed protocol was compared with a flow cytometry‐based cell counting approach. The experimental results show that the proposed protocol is much easier to carry out and delivers faster and more accurate results in measuring individual biomass concentration than the cell counting approach without requiring any special equipment.

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Nutrient recovery from industrial wastewater as single cell protein by a co-culture of green microalgae and methanotrophs

Cited by 119 publications

References 50 publications

Sustainable production of bio-crude oil via hydrothermal liquefaction of symbiotically grown biomass of microalgae-bacteria coupled with effective wastewater treatment

Sustainable production of bio-crude oil via hydrothermal liquefaction of symbiotically grown biomass of microalgae-bacteria coupled with effective wastewater treatment

Nutrient and heavy metal removal from piggery wastewater and CH₄ enrichment in biogas based on microalgae cultivation technology under different initial inoculum concentration

Fast and easy quantitative characterization of methanotroph–photoautotroph cocultures

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Nutrient recovery from industrial wastewater as single cell protein by a co-culture of green microalgae and methanotrophs

Cited by 119 publications

References 50 publications

Sustainable production of bio-crude oil via hydrothermal liquefaction of symbiotically grown biomass of microalgae-bacteria coupled with effective wastewater treatment

Sustainable production of bio-crude oil via hydrothermal liquefaction of symbiotically grown biomass of microalgae-bacteria coupled with effective wastewater treatment

Nutrient and heavy metal removal from piggery wastewater and CH4 enrichment in biogas based on microalgae cultivation technology under different initial inoculum concentration

Fast and easy quantitative characterization of methanotroph–photoautotroph cocultures

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Product

Resources

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Nutrient and heavy metal removal from piggery wastewater and CH₄ enrichment in biogas based on microalgae cultivation technology under different initial inoculum concentration