Pyrochars from bioenergy residue as novel bio-adsorbents for lignocellulosic hydrolysate detoxification

New opportunities for agricultural digestate valorization: current situation and perspectives

“…Indeed, lignocellulosic hydrolyzate may contain furan compounds (i.e. furfural, 5-HMF) that can affect the majority of sugar-fermenting microorganisms and thus biological biofuel platform 157 .…”

“…According the results of this paragraph, it is obvious that pyrochars produced from digestates could be effective alternative and low-cost bio-adsorbents for organic and inorganic contaminants 157 .…”

Biochar-mediated enhanced ethanol fermentation (BMEEF) in Zymomonas mobilis under furfural and acetic acid stress

“…However, little is known about the effects of biochar as a fermentation additive to improve ethanol fermentation by Z. mobilis in the presence of a high concentration of inhibitors in the hydrolysate [24,25]. Biochar has shown its capacity in adsorptive detoxification of phenols, furfural, and 5-HMF [26][27][28]. However, biochar was not efficient in acetic acid adsorption.…”

“…A large amount of biochar for detoxification would impede its practical application. For example, the application of 4% biogas digestate-derived biochar in synthetic medium removed more than 94% of 5-HMF and 99% of furfural after 24 h of contact time [28].…”

Mesophilic–hydrothermal–thermophilic (M–H–T) digestion of green corn straw

“…Chemical pretreatment with acids and alkalis increase the probability of subsequent alkali and acid neutralization, accelerate equipment corrosion, and easily cause secondary pollution. Hydrothermal treatment is preferred despite the high energy consumption; however, intensive pretreatment conditions can degrade existing soluble sugars, such as glucose and xylose, into furfural and hydroxymethylfurfural, which would inhibit anaerobic fermentation and waste the available carbon source (Monlau et al, 2015;Zheng et al, 2014).…”