Characteristic and calculation on the co-contribution in the bio-H energy recovery enhancement with low temperature pretreated peanut shell as co-substrate.

Bio-H production from organic wastewater together with lignocellulose wastes not only achieved the H energy recovery, but also be beneficial to carbon emission reduction and carbon neutralization. In order to obtain higher energy recoveries, promotion attempts were performed in bio-H fermentation with low temperature (-80-0 °C) pretreated peanut shell powder (PSP) as co-substrate. A maximum H production of 109.2 mL was obtained as almost double of the sum from the same amount of untreated PSP and glucose as sole substrate. The enhancement was co-contributed by 44% from PSP supplementary, 35% from low-temperature pretreatment, and 2.8% from buffer effect and acidification, respectively, and realized through C/N balancing, PSP conversion influencing, fermentative pH buffering and time prolonging. The experimental results uncovered the co-contribution realization ways of supplementing low-temperature pretreated lignocellulose wastes in the bio-H fermentation system, and provided mechanism support for application potential of low-temperature pretreatment on lignocellulose wastes in cold regions.