This work presents
an alternative to produce LA from potato peel waste (PPW) by anaerobic fermentation in a sequencing
batch reactor (SBR) inoculated with undefined mixed culture from a municipal wastewater treatment
plant. A statistical design of experiments approach was employed using set of 0.8 L SBRs using gelatinized
PPW at a solids content range from 30 to 50 g L1
, solids retention time of 2–4 days for yield and productivity
optimization. The maximum LA production yield of 0.25 g g1 PPW and highest productivity of
125 mg g1 d1 were achieved. A scale-up SBR trial using neat gelatinized PPW (at 80 g L1 solids content)
at the 3 L scale was employed and the highest LA yield of 0.14 g g1 PPW and a productivity of
138 mg g1 d1 were achieved with a 1 d SRT.
2015