Efficient production of l-lactic acid from chicken feather protein hydrolysate and sugar beet molasses by the newly isolated Rhizopus oryzae TS-61

High-efficiency l-lactic acid production by Rhizopus oryzae using a novel modified one-step fermentation strategy

“…As seen from Table 2, urea and (NH) 2 SO 4 appeared to be less favorable nitrogen sources for increasing biomass and L-lactic acid production. These results are similar to those found in a study by Taskin et al (2012). Yeast extract was found to be beneficial for cell growth, but it was not conducive for the production of lactic acid.…”

“…Nitrogen source affects the biomass and synthesis of a variety of enzymes, which will ultimately influence the amount of metabolites synthesized (Taskin et al 2012; Zhang et al 2007b). Therefore, The effect of different nitrogen source, including organic nitrogen: peptone, urea and yeast extract and inorganic nitrogen:(NH) 2 SO 4 on OSF was investigated and the results are shown in Table 2.…”

Lactic acid production on a combined distillery stillage and sugar beet molasses substrate

“…The yields achieved on these substrates without pretreatment or supplementation were in the range 0.88–0.95 g g −1 and the productivities between 1.16 and 1.66 g L −1 h −1 . In the study by Taskin et al . LA concentration of 38.5 g L −1 was achieved at initial sugar concentration of 50 g L −1 on sugar beet molasses and chicken feather protein hydrolysate by Rhizopus oryzae , which was notably lower than the above presented results with LAB.…”

“…Economic feasibility is of prime importance in choosing a raw material for fermentative LA production. Sugar cane and beet molasses, soybean vinasse, waste by‐product of xylitol production, sweet sorghum, sugarcane and sugar beet juice, lignocellulosic hydrolysates, excess sludge and chicken feather protein hydrolysate were studied as low‐cost substrates in order to reduce the total cost of LA production. Characteristics of the above mentioned raw materials are their heterogeneous chemical nature and the presence of a mixture of various sugars and nutrients.…”

Dehydration of Lactic Acid: The State of The Art

“…Biocatalysts of the Rhizopus type, mainly R. Oryzae , have many advantages compared to bacteria, such as their natural shape in the form of filaments or pellets simplifying the processes , the enantioselectivity for L (+) lactic acid , the low nutritive costs (sources of nitrogen, carbon, phosphorus, sulphur, and inorganic salts), and their amylolytic properties that enable the direct use of starch without needing saccharification . Lactic acid can thus be produced from molasses , lignocellulosic biomass , or starch. On the other hand, there are still certain obstacles such as the production of by‐products (ethanol and fumaric acid) or limits in the transfer of the oxygen necessary for fungi .…”