Suitability of crude glycerol obtained from biodiesel waste for the production of trehalose and propionic acid

Activation of glycerol metabolic pathway by evolutionary engineering of Rhizopus oryzae to strengthen the fumaric acid biosynthesis from crude glycerol

“…Although the fumaric acid yield from glycerol by G80 was slightly lower than that by other Rhizopus strains The yield of fumaric acid in pure glycerol medium was significantly reduced to 0.183 g/g glycerol. These results demonstrated that crude glycerol was more suitable for the production of fumaric acid compared with pure glycerol, which was in accordance with the findings previously reported (Ruhal et al, 2011).…”

“…4D). Both cadaverine and 21 trehalose were considered as a ROS scavenger that protected proteins to resist oxidative stress . The high levels of trehalose and cadaverine in the parent strain further indicated that the strain vulnerability to redox changes caused more ROS scavengers synthesis to remove excess ROS.…”

Electrooxidation of crude glycerol as waste from biodiesel in a nanofluidic fuel cell using Cu@Pd/C and Cu@Pt/C

“…It is estimated that every 1 kg of biodiesel production will be accompanied by the production of 0.1 kg of crude glycerol (10 wt%), whereas the precise quantity of biomass production can vary from 1 to 1.5 kg depending on the oil content [1]. The resulting waste is a rich source of crude glycerol, but due to the presence of contaminants it is difficult to use without purification [2]. A large proportion of the impurities in crude glycerol consist of unreacted methanol and soaps formed during the transesterification reaction [3].…”

Electrocatalytic oxidation of n-propanol to produce propionic acid using an electrocatalytic membrane reactor

“…1 Industrial manufacture of propionic acid is either by chemical routes or by biological fermentation. 2 With the ever-increasing need for a sustainable chemical process, tremendous attention has been paid to efficient, environmentally friendly methods for production of organic molecules. However, these techniques have various disadvantages such as drastic conditions (high temperature and pressures), more than one synthetic stages and/or production of mixture that requires a further complex workup.…”

“…With the reaction temperature rising from 25 to 50 1C, the conversion of n-propanol and the selectivity to propionic acid reached the highest value of 98.44% and 79.33%, respectively. 20 Then the absorbed hydroxyl radicals interacted with the oxygen of the MnO 2 lattice in the MnO 2 /Ti anode to generate a higher valent oxomanganese species (Mn V QO) oxide [eqn (2)]. 18 Therefore, the results revealed that the residence time and reaction temperature play the key role in the oxidation process of n-propanol as well as the production of propionic acid in the ECMR.…”