Production of lactic acid and fungal biomass by Rhizopus fungi from food processing waste streams.
This study proposed a novel waste utilization bioprocess for production of lactic acid and fungal biomass from waste streams by fungal species of Rhizopus arrhizus 36017 and R. oryzae 2062. The lactic acid and fungal biomass were produced in a single-stage simultaneous saccharification and fermentation process using potato, corn, wheat and pineapple waste streams as production media. R. arrhizus 36017 gave a high lactic acid yield up to 0.94-0.97 g/g of starch or sugars associated with 4-5 g/l of fungal biomass produced, while 17-19 g/l fungal biomass with a lactic acid yield of 0.65-0.76 g/g was produced by the R. oryzae 2062 in 36-48 h fermentation. Supplementation of 2 g/l of ammonium sulfate, yeast extract and peptone stimulated an increase in 8-15% lactic acid yield and 10-20% fungal biomass.
Jin
Bo
B
SA Water Centre of Water Science and Systems, University of South Australia, Mawson Lakes, SA 5095, Australia. bo.jin@unisa.edu.au
Yin
Pinghe
P
Ma
Yihong
Y
Zhao
Ling
L
D031230:Ananas / Q000737:chemistry / Q000378:metabolism; D018533:Biomass; D003470:Culture Media / Q000737:chemistry; D005285:Fermentation; D005511:Food Handling / Q000379:methods*; D007218:Industrial Microbiology / Q000379:methods*; D019344:Lactic Acid / Q000096:biosynthesis*; D012037:Refuse Disposal / Q000379:methods*; D012233:Rhizopus / Q000254:growth & development / Q000378:metabolism*; D011198:Solanum tuberosum / Q000737:chemistry / Q000378:metabolism; D013213:Starch / Q000737:chemistry / Q000378:metabolism; D014908:Triticum / Q000737:chemistry / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry / Q000378:metabolism
D003470:Culture Media; D019344:Lactic Acid; D013213:Starch