Promoting anaerobic digestion by algae-based hydrochars in a continuous reactor

Wang, Fengbo; Wang, Jing; Li, Zelong; Zan, Shuaijun; Du, Miaomiao

doi:10.1016/j.biortech.2020.124201

Cited by 21 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The methane yield was 213.2 L/ kg of volatile solids. A combined macro-algae Laminaria-based hydrochar) and microalgae Chlorella-based hydrochar was anaerobically digested and yielded methane productivity of 222.9 ± 1.6 mL/g chemical oxygen demand for Chlorella-based hydrochar and 234.8 ± 9.5 mL/g chemical oxygen demand for Laminaria-based hydrochar (Wang et al 2020a). Methane generation from algae is quite low and slow due to the poor biodegradability and solubility.…”

Section: Biogas Productivitymentioning

confidence: 99%

Cultivation of microalgae on liquid anaerobic digestate for depollution, biofuels and cosmetics: a review

et al. 2022

View full text Add to dashboard Cite

Solid wastes from domestic, industrial and agricultural sectors cause acute economic and environmental problems. These issues can be partly solved by anaerobic digestion of wastes, yet this process is incomplete and generates abundant byproducts as digestate. Therefore, cultivating mixotrophic algae on anaerobic digestate appears as a promising solution for nutrient recovery, pollutant removal and biofuel production. Here we review mixotrophic algal cultivation on anaerobic waste digestate with focus on digestate types and characterization, issues of recycling digestate in agriculture, removal of contaminants, and production of biofuels such as biogas, bioethanol, biodiesel and dihydrogen. We also discuss applications in cosmetics and economical aspects. Mixotrophic algal cultivation completely removes ammonium, phosphorus, 17β-estradiol from diluted digestate, and removes 62% of zinc, 84% of manganese, 74% of cadmium and 99% of copper.

show abstract

Section: Biogas Productivitymentioning

confidence: 99%

Cultivation of microalgae on liquid anaerobic digestate for depollution, biofuels and cosmetics: a review

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Previously, Wu et al, Castro et al., and Shyam et al comprehensively discussed the effects of operating parameters of HTC treatment on surface morphology of hydrochar and the underlying mechanism for hydrochar utilization as absorbents for wastewater treatment. Recent studies on the algae-derived hydrochar application for enhancing biogas production in anaerobic digesters have been reported as well, − even though the associated mechanism is still to be clarified …”

Section: Biofuels From Algaementioning

confidence: 99%

Recent Advances in Algae-Derived Biofuels and Bioactive Compounds

Feng

Kang

Salaudeen

et al. 2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Owing to the declining reserve of fossil resources as well as more concerns on climate change, and essential energy security, and especially the broad consensus on carbon neutralization, it is significantly critical to develop renewable and sustainable energy and chemicals. Algae as alternative resources can be applied to produce biofuels and biochemicals. Among them, algae-derived natural pigments exhibit high market value due to their uses in pharmaceutical and food industries. As a result of the developments of engineering tools, it is feasible to scale up algal processing and applications. Prior to the industrial implementation, life cycle assessment is required to ensure the environmental feasibility of algae-based biofuels and biochemicals. In this article, recent advances in processing algae for liquid, gas, and solid fuels are reviewed. New approaches for enhancing the natural pigment accumulation are also discussed. Recent studies on life cycle assessment of algae-based biofuels and biochemicals, as well as the main challenges faced by the algal biorefinery, are discussed in this manuscript.

show abstract

Sustainable resource recovery and process improvement in anaerobic digesters using hydrochar: A circular bio‐economic perspective

Oumabady

Ramasamy

Sebastian

et al. 2023

J of Sust Agri & Env

View full text Add to dashboard Cite

Hydrothermal carbonization (HTC) is a promising technology for waste valorisation and nutrient recovery to achieve sustainability. HTC converts organic waste into hydrochar, a carbon‐rich solid with numerous surface functionalities that can be used for energy and wastewater treatment. In this review, we highlight the potential of hydrochar‐based technology for improving the performance of anaerobic digestion (AD) systems and downstream applications of nutrient‐laden hydrochar. We identify knowledge gaps in hydrochar production, performance in AD systems and nutrient recovery, including the need for larger‐scale production facilities, multielement adsorption studies, and computational modelling. Techno‐economic analysis and life cycle assessment of hydrochar applications are critical to evaluating the commercial viability of this technology. Overall, hydrochar‐based technology offers a sustainable solution for waste management and resource recovery, with potential socioeconomic benefits for developing economies. The deployment of hydrochar‐based technology will directly address key issues highlighted in the United Nations' Sustainable Development Goals such as Clean water and sanitation (SDG 6); Zero hunger (SDG 2); and Climate action (SDG 13) thereby contributing to a more sustainable future.

show abstract

Promoting anaerobic digestion by algae-based hydrochars in a continuous reactor

Cited by 21 publications

References 42 publications

Cultivation of microalgae on liquid anaerobic digestate for depollution, biofuels and cosmetics: a review

Cultivation of microalgae on liquid anaerobic digestate for depollution, biofuels and cosmetics: a review

Recent Advances in Algae-Derived Biofuels and Bioactive Compounds

Sustainable resource recovery and process improvement in anaerobic digesters using hydrochar: A circular bio‐economic perspective

Contact Info

Product

Resources

About