Pretreatment of food residues to enhance fermentative production of biohydrogen

The batch fermentative hydrogen production at 36 ℃from food residues with preheated anaerobic digested sludge at 80 ℃ was studied,and investigated efficiency of hydrogen production with different pretreatment.The results by Gompertz model show that:the lag-phase time(λ),the maximal specific hydrogen rate,the specific hydrogen potential and the maximal hydrogen contents of biogas of microwave(850W for 4min) at pH 9.0 pretreatment are 3.47 h,9.43 mL/(g·h),186.23 mL/g and 46.0%,respectively.Therefore,microwave(850W for 4min) at pH 9.0 pretreatment can enhance hydrogen production.The process of fermentative hydrogen production is an acidification process,so the pH was from 4.40 to 5.00 in the fermentative end products of the four pretreatment.