Influence of Microwave Pretreatment on Fermentative Biohydrogen Production of Food Residues

The batch fermentative hydrogen production at 36℃ from food residues with preheated anaerobic digested sludge at 80 ℃ and 15 min is studied,and investigated efficiency of hydrogen production with different microwave pretreatment time of 0,1,2,4 and 8 min at 600W.Moreover,the exeperiment results are regressed by correctional Compertz model using CurveExpert1.3 software.The results show that:Microwave pretreatment at 2 min considering energy balance,of which the lag-phase time(λ) the maximal specific hydrogen rate and the specific hydrogen potential were 2.51h,13.33 mL/(g·h) and 215.11 mL/g,can consumingly enhance hydrogen production.Normal butyrate was the main acid product in the fermentative end products,and the percentages of butyrate and acetate at tested volatile fatty acid concentrations exceeded 79.3%.Therefore,the butyrate-type fermentation is the main fermentative type.