Ginkel S V, Sung S, Lay J J
Department of Civil & Construction Engineering, Iowa State University, Ames 50011-3232, USA.
Environ Sci Technol. 2001 Dec 15;35(24):4726-30. doi: 10.1021/es001979r.
The conversion of organics in wastewaters into hydrogen gas could serve the dual role of renewable energy production and waste reduction. The chemical energy in a sucrose rich synthetic wastewater was recovered as hydrogen gas in this study. Using fractional factorial design batch experiments, the effect of varying pH (4.5-7.5) and substrate concentration (1.5-44.8 g COD/L) and their interaction on hydrogen gas production were tested. Mixed bacterial cultures obtained from a compost pile, a potato field, and a soybean field were heated to inhibit hydrogen-consuming methanogens and to enrich sporeforming, hydrogen-producing acidogens. It was determined that the highest rate (74.7 mL H2/(L*h)) of hydrogen production occurred at a pH of 5.5 and a substrate concentration of 7.5 g COD/Lwith a conversion efficiency of 38.9 mL H2/(g COD/L). The highest conversion efficiency was 46.6 mL H2/(g COD/L).
将废水中的有机物转化为氢气可起到可再生能源生产和减少废物的双重作用。本研究中，富含蔗糖的合成废水中的化学能被回收为氢气。采用分数析因设计批次实验，测试了不同pH值（4.5 - 7.5）和底物浓度（1.5 - 44.8 g COD/L）及其相互作用对氢气产生的影响。从堆肥堆、土豆田和大豆田获得的混合细菌培养物经过加热处理，以抑制消耗氢气的产甲烷菌，并富集形成芽孢的产氢产酸菌。结果确定，在pH值为5.5、底物浓度为7.5 g COD/L时，氢气产生速率最高（74.7 mL H2/(L*h)），转化效率为38.9 mL H2/(g COD/L)。最高转化效率为46.6 mL H2/(g COD/L)。
