Mesophilic fermentation upgrades SCFA production from natural/raw henna plant biomass

Huang, Jingang; Guo, Kangyin; Shi, Benyun; Li, Jianping

doi:10.1007/s13399-020-00764-4

Cited by 5 publications

(1 citation statement)

References 31 publications

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“…Despite the relatively lower soluble COD under room temperature and mesophilic systems, the highest VFAs accumulations in T1 and T2 were 1.6-fold and 1.7-fold higher than that under thermophilic system (T3). This is different from previous studies with WAS as a fermentation substrate, which suggests that higher temperature (50 °C) favored the VFAs production by up to several folds (Huang et al 2021). Thus, riboflavin could promote the VFAs production from WAS fermentation under relatively lower temperature.…”

Section: Vfas Accumulation and Their Compositioncontrasting

confidence: 98%

Effect of temperature on fermentative VFAs production from waste sludge stimulated by riboflavin and the shifts of microbial community

Liu

Huang

et al. 2022

Water Science and Technology

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Fermentative volatile fatty acids (VFAs) production from waste activated sludge (WAS) under moderate temperature is a promising way for resource and energy regeneration in municipal wastewater treatment plants (MWTPs). In this study, the effect of temperature on VFAs production and the associated microbial community from riboflavin-assisted WAS fermentation were investigated. Three fermentative reactors under 25, 35 and 55 °C were operated for 30 days, respectively. The results indicated that riboflavin enhanced VFAs production from WAS fermentation under moderate temperature (25 °C, 35 °C), increasing conversion of organic matters to bioavailable substrates for the subsequent acidification process. Although a small dosage of riboflavin (1.0 ± 0.05 mM) hardly inhibited the methanogenic process, it could mediate the electron to be sank into VFAs under lower temperature. This in turn increased the accumulation of acetic and propionic acids (up to 234 mg/g of VSS) and their proportions to the total VFAs, providing efficient electron donor and carbon sources for nutrient removal in MWTPs. Furthermore, microbial communities were shifted in response to the temperature, and riboflavin stimulated the special fermentative bacteria under room temperature and mesophilic conditions. The study suggested a feasible and eco-friendly method to improve VFAs production from crude WAS at a relatively lower temperature.

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Section: Vfas Accumulation and Their Compositioncontrasting

confidence: 98%