Biotechnological production of lactic acid integrated with fishmeal wastewater treatment by Rhizopus oryzae.
Fishmeal wastewater, a seafood processing waste, was utilized for production of lactic acid and fungal biomass by Rhizopus oryzae AS 3.254 with the addition of sugars. The 30 g/l exogenous glucose in fishmeal wastewater was superior to starch in view of productivities of lactic acid and fungal biomass, and COD reduction. Fishmeal wastewater can be a replacement for peptone which was the most suitable nitrogen source for lactic acid production among the tested organic or inorganic nitrogen sources. Exogenous NaCl (12 g/l) completely inhibited the production of lactic acid and fungal growth. In the medium of COD 5,000 mg/l fishmeal wastewater with the addition of 30 g/l glucose, the maximum productivity of lactic acid was 0.723 g/l h corresponding to productivity of fungal biomass 0.0925 g/l h, COD reduction 84.9% and total nitrogen removal 50.3% at a fermentation time of 30 h.
Huang
Li Ping
LP
School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, China. huang9511@yahoo.com
Dong
Tao
T
Chen
Jing Wen
JW
Li
Ning
N
D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D001709:Biotechnology / Q000379:methods*; D049109:Cell Proliferation; D005396:Fish Products / Q000382:microbiology*; D007220:Industrial Waste / Q000517:prevention & control*; D019344:Lactic Acid / Q000378:metabolism*; D012233:Rhizopus / Q000502:physiology*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D019344:Lactic Acid