Effects of nitrate concentration on biological hydrogen production by mixed cultures  

作　　者：Bo WANG Wei WAN Jianlong WANG 

机构地区：[1]Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Environmental Science & Engineering》2009年第4期380-386,共7页环境科学与工程前沿（英文）

基　　金：the National Natural Science Foundation of China(Grant No.50325824).

摘　　要：The effects of nitrate on fermentative hydrogen production and soluble metabolites from mixed cultures were investigated by varying nitrate concentrations from 0 to 10 g N/L at 35℃ with an initial pH of 7.0.The results showed that the substrate degradation rate,hydrogen production potential,hydrogen yield,and average hydrogen production rate initially increased with increasing nitrate concentrations from 0 to 0.1 g N/L,while they decreased with increasing nitrate concentrations from 0.1 to 10 g N/L.The maximum hydrogen production potential of 305.0 mL,maximum hydrogen yield of 313.1 mL/g glucose,and maximum average hydrogen production rate of 13.3 mL/h were obtained at a nitrate concentration of 0.1 g N/L.The soluble metabolites produced by the mixed cultures contained only ethanol and acetic acid(HAc)without propionic acid(HPr)and butyric acid(HBu).This study used the Modified Logistic model to describe the progress of cumulative hydrogen production in batch tests.A concise model was proposed to describe the effects of nitrate concentration on average hydrogen production rate.

关 键 词：nitrogen source BIOHYDROGEN fermentative hydrogen production quantitative kinetic model 

分 类 号：F42[经济管理—产业经济]