Mild-temperature thermochemical pretreatment of green macroalgal biomass: Effects on solubilization, methanation, and microbial community structure

Jung, Heejung; Baek, Gahyun; Kim, Jaai; Shin, Seung Gu; Lee, Changsoo

doi:10.1016/j.biortech.2015.08.014

Cited by 36 publications

(14 citation statements)

References 27 publications

(35 reference statements)

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“…Comparatively, a similar treatment of Ulva spp. with 0.1 M or 0.2 M HCl or NaOH at 60 • C, 75 • C, and 90 • C did not increase methane yields compared to only thermal pre-treatment (Table 4) [118]. However, both experiments used different methods for BMP determination, making the direct comparison between the two experiments challenging.…”

Section: Alkali or Acidic Treatmentmentioning

confidence: 98%

A Review of Seaweed Pre-Treatment Methods for Enhanced Biofuel Production by Anaerobic Digestion or Fermentation

et al. 2018

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Macroalgae represent a potential biomass source for the production of bioethanol or biogas. Their use, however, is limited by several factors including, but not restricted to, their continuous supply for processing, and low biofuel yields. This review examines recent pre-treatment processes that have been used to improve the yields of either biogas or bioethanol from macroalgae. Factors that can influence hydrolysis efficiency and, consequently, biofuel yields, are highly affected by macroalgal composition, including content of salts, heavy metals, and polyphenols, structural make-up, as well as polysaccharide composition and relative content of carbohydrates. Other factors that can influence biofuel yield include the method of storage and preservation.

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Section: Alkali or Acidic Treatmentmentioning

confidence: 98%

A Review of Seaweed Pre-Treatment Methods for Enhanced Biofuel Production by Anaerobic Digestion or Fermentation

et al. 2018

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“…Not only are macroalgae able to help decrease atmospheric CO2, but it has also shown to have other environmental impacts (Jung, et. al.…”

Section: The Potential Of Green Macroalgaementioning

confidence: 99%

Prospectus for Future Research: Temperature Effects on Green Macroalgae

Pelayo

2016

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“…The negative effect of high NaOH concentration on Ym may be related to the inhibition of methanogenic activity [13]. One concern regarding pretreatment methods that use strong alkalis is the inhibitory effect of salt stress caused by the addition of alkali (for pretreatment) and acid (for pH neutralization) on methanogenesis [17].…”

Section: Correlation Between Sd and Ymmentioning

confidence: 99%

“…Therefore, a total of thirteen pretreatment trials were conducted. Based on previous studies on thermochemical pretreatment of different feedstocks [11,13], NaOH concentrations and temperatures in the ranges of 0-0.2 M and 60-90 • C, respectively, were tested in this study. A sequential procedure of collecting data, testing polynomial equations, and evaluating model adequacy was followed for the RSA.…”

Section: Experimental Design For Response Surface Analysismentioning

confidence: 99%

Effect of Mild-Temperature Thermo-Alkaline Pretreatment on the Solubilization and Anaerobic Digestion of Spent Coffee Grounds

Kim

Lee

2018

Energies

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Abstract:Mild-temperature thermo-alkaline pretreatment of spent coffee grounds (SCG) was studied to improve its solubilization and methanation. The simultaneous effects of NaOH concentration (0-0.2 M) and temperature (60-90 • C) were investigated. Significant solubilization of SCG was achieved by the pretreatment, particularly under high-NaOH-concentration and high-temperature conditions. However, adding NaOH above a certain concentration adversely affected the methane production. Therefore, the degree of solubilization (SD) correlated poorly with methane yield (Ym). Response surface models of SD and Ym were successfully generated. The maximum response of SD (36.4%) was obtained at 0.18 M NaOH and 90.0 • C, while that of Ym (263.31 mL CH 4 /g COD added) was obtained at 0.13 M NaOH and 70.5 • C. Hydrogenotrophic Methanospirillum species were the dominant methanogens in all the SCG digestion tests. It is likely that NaOH concentration had a more significant influence on the development of microbial community structure, particularly of methanogens than temperature.

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Mild-temperature thermochemical pretreatment of green macroalgal biomass: Effects on solubilization, methanation, and microbial community structure

Cited by 36 publications

References 27 publications

A Review of Seaweed Pre-Treatment Methods for Enhanced Biofuel Production by Anaerobic Digestion or Fermentation

A Review of Seaweed Pre-Treatment Methods for Enhanced Biofuel Production by Anaerobic Digestion or Fermentation

Prospectus for Future Research: Temperature Effects on Green Macroalgae

Effect of Mild-Temperature Thermo-Alkaline Pretreatment on the Solubilization and Anaerobic Digestion of Spent Coffee Grounds

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