Microalgae cultivation using biogas and digestate carbon sources

Nguyen, Mai-Linh Thi; Lin, Chiu‐Yue; Lay, Chyi-How

doi:10.1016/j.biombioe.2019.01.050

Cited by 33 publications

(10 citation statements)

References 35 publications

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“…4 at the highest concentration, and in ref. 31 COD was 5000 mg.L −1 . Tolerance to high COD varies based on different factors which are mentioned in more details in next section.…”

Section: Chlorophylls and Carbohydratesmentioning

confidence: 95%

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Utilization of tannery wastewater for biofuel production: New insights on microalgae growth and biomass production

Nagi

et al. 2020

Sci Rep

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Microalgae cultivation on tannery wastewater (tWW) has been examined in some studies as a possible biological application to reduce contamination load and discharge effluents safely. However, Growth aspects, different tolerate strains and enriching the medium were not well investigated. In our study we applied Scenedesmus sp., Chlorella variabilis and Chlorella sorokiniana with different TWW concentrations. C. sorokiniana and C. variabilis cell density, chlorophyll, and sugar content grew substantially as compared to control. C. sorokiniana biomass and total lipids folded three and two times in 25% and 40% TWW, respectively as compared to control. Scenedesmus sp. showed longer lag phase and lower performance compared to the other two strains. Kelp waste extract (KWE) was added to balance the nutrients supply for C. sorokiniana, of which growth and effluents indicators were then greatly promoted in all concentrations. As the lag phase was shortened from 8 to 4 days in 60% concentration, subsequently, chlorophyll, carbohydrates, biomass and total lipids appreciated by 184%, 400%, 162% and 135%, respectively. Furthermore, the COD and ammonium removals improved by 51% and 45%, respectively. These outcomes emphasize the suitability of using TWW for microalgae cultivation with the suitable concentration while adding kelp waste extract for further enhancement.

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“…4 at the highest concentration, and in ref. 31 COD was 5000 mg.L −1 . Tolerance to high COD varies based on different factors which are mentioned in more details in next section.…”

Section: Chlorophylls and Carbohydratesmentioning

confidence: 95%

“…Scenedesmus sp. cultivated on biogas and digestated carbon source reported to produce 1.8 g.L −1 of dry biomass 31 . A slight change in total lipids in percentage (Fig.…”

Section: Chlorophylls and Carbohydratesmentioning

confidence: 99%

Utilization of tannery wastewater for biofuel production: New insights on microalgae growth and biomass production

Nagi

et al. 2020

Sci Rep

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“…In the fourth stage called methanogenesis (IV STAGE, Figure 1), methanogenic microorganisms convert hydrogen, carbon, and acetic acid dioxide to methane. This stage is mediated by Methanosarcina spp., Methanothrix spp., Methanobacterium , Methanococcus as well as numerous other methanogenic strains . Acetic acid is direct substrate for methanogenic microorganisms, and therefore the improved conversion of acetic acid can strengthen this stage of methanogenesis.…”

Section: Stages Of Admentioning

confidence: 99%

“…This stage is mediated by Methanosarcina spp., Methanothrix spp., Methanobacterium, Methanococcus as well as numerous other methanogenic strains. [61][62][63][64][65] Acetic acid is direct substrate for methanogenic microorganisms, and therefore the improved conversion of acetic acid can strengthen this stage of methanogenesis. The implementation of appropriate methods enhancing the AD process is also beneficial in terms of generating the maximum amount of methane.…”

Section: Methanogenesismentioning

confidence: 99%

Intensification of biogas production using various technologies: A review

et al. 2020

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Summary Anaerobic digestion (AD) is an organic matter conversion technology which offers a wide range of options for production of biogas from organic biomass, providing an excellent opportunity to convert abundant bioresources into safe, eco‐friendly, renewable energy. Important factors in the process of AD are the biodiversity of microorganisms, chemical load of oxygen demand, and content of water and total solids. A challenge for the future is to find technologies that will maximally enhance biogas production and to find pathways for biogas to supersede well‐established technologies and practices in the contemporary heavily fossil fuel‐based energy system. Current studies on technologies of biogas production indicate a number of possibilities of using appropriate biological and physicochemical additives, like added enzymes or fruit pomace, as well as immobilizing microorganisms on biofilters. Anaerobic biorefinery is an emerging concept that generates not only bioenergy but also high‐value biochemical products from the same feedstock. This study is a review of articles describing the intensification of biogas production by using various technologies.

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“…This paper is a new attempt at proposing a circular economy with a marine viewpoint. Although researchers have attempted to use digestate for cultivation of marine creatures related to microalgae (Nguyen et al, 2013(Nguyen et al, , 2015Nguyen, Lin, & Lay, 2019;Veronesiv et al, 2017;Yang et al, 2017;Zhou et al, 2019;Zhu et al, 2019), few studies have applied digestate to macro algae such as nori.…”

Section: Introductionmentioning

confidence: 99%

Effect of Digestate from Methane Fermentation using <i>Ulva</i> sp. and Food Waste for Cultivation of Decolored <i>Pyropia yezoensis</i> (Edible Laver Seaweed)

Kuroda

Nishikawa

2020

EUROPEAN J SUSTAINAB DEV

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Ulva sp. (green seaweed) often proliferates explosively and piles up in shallows. This phenomenon is called "green tide," caused by increased nutrient flow into an enclosed sea area. Although green tide is one of the environmental problems in coastal areas, Ulva sp. can be regarded as carbon-neutral and therefore can serve as an abundant feedstock for renewable energy. Methane fermentation is one of the suitable techniques for converting such seaweed into energy. Digestate from methane fermentation is normally used as fertilizer; however, it is ends up being treated as wastewater due to limited spaces in urban areas. This paper proposes that the digestate from methane fermentation using mixed biomass (Ulva sp. and food waste) can be applied to the cultivation of Pyropia yezoensis (edible laver seaweed, nori in Japanese), which has recently suffered from decolored phenomena because of decreasing nutrients. The absorption of nutrients and the color recovery of nori were investigated in laboratory-scale experiments based on comparison with artificial seawater. The results highlight that the significant absorption of nutrients and color recovery occurred because of digestate utilization, indicating its positive effects on decolored nori. In addition, the experiments found that not only NH4-N, but also other substances such as trace metal related to Ulva sp. can influence such effects. The findings clearly indicate that digestate can be used in the sea and that the suggested multiple uses of digestate would increase the value of digestate.

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Microalgae cultivation using biogas and digestate carbon sources

Cited by 33 publications

References 35 publications

Utilization of tannery wastewater for biofuel production: New insights on microalgae growth and biomass production

Utilization of tannery wastewater for biofuel production: New insights on microalgae growth and biomass production

Intensification of biogas production using various technologies: A review

Effect of Digestate from Methane Fermentation using <i>Ulva</i> sp. and Food Waste for Cultivation of Decolored <i>Pyropia yezoensis</i> (Edible Laver Seaweed)

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