TY - JOUR
T1 - Microbial electrolysis enhanced bioconversion of waste sludge lysate for hydrogen production compared with anaerobic digestion
AU - Yu, Zhe
AU - Liu, Wenzong
AU - Shi, Yingjun
AU - Wang, Bo
AU - Huang, Cong
AU - Liu, Chunshuang
AU - Wang, Aijie
PY - 2021
Y1 - 2021
N2 - Waste sludge lysate was produced by dehydration after pyrolysis of waste activated sludge. In addition to dominant components such as protein, polysaccharide, and volatile fatty acids (VFAs), it also contained melanoidins, which produced from Maillard reaction. The inclusion of melanoidins will lead to poor biological degradation in conventional anaerobic digestion (AD). While microbial electrolysis cell (MEC) was proved an enhanced degradation of complex organic matter for hydrogen production. The results showed that under high concentration conditions, conventional AD caused the accumulation of propionic acid and slowed down the use of acetic acid, but MEC overcame the defects and increased the chemical oxygen demand (COD) removal efficiency by 40.33%, and achieved average hydrogen production rate (0.15 ± 0.05 L L-1 day-1), which was 79 times that of AD system (0.0019 ± 0.0009 L L-1 day-1). Therefore, MEC can enhanced biodegradation of the waste sludge lysate for high hydrogen production.
AB - Waste sludge lysate was produced by dehydration after pyrolysis of waste activated sludge. In addition to dominant components such as protein, polysaccharide, and volatile fatty acids (VFAs), it also contained melanoidins, which produced from Maillard reaction. The inclusion of melanoidins will lead to poor biological degradation in conventional anaerobic digestion (AD). While microbial electrolysis cell (MEC) was proved an enhanced degradation of complex organic matter for hydrogen production. The results showed that under high concentration conditions, conventional AD caused the accumulation of propionic acid and slowed down the use of acetic acid, but MEC overcame the defects and increased the chemical oxygen demand (COD) removal efficiency by 40.33%, and achieved average hydrogen production rate (0.15 ± 0.05 L L-1 day-1), which was 79 times that of AD system (0.0019 ± 0.0009 L L-1 day-1). Therefore, MEC can enhanced biodegradation of the waste sludge lysate for high hydrogen production.
U2 - 10.1016/j.scitotenv.2020.144344
DO - 10.1016/j.scitotenv.2020.144344
M3 - Journal article
C2 - 33434845
SN - 0048-9697
VL - 767
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 144344
ER -
