| Summary: | 碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程所 === 91 === The purpose of this study was to probe the both roles of Fe3+ and Fe2+ on the anaerobes converting organic solid wastes to hydrogen. For this purpose, several 100-mL bottle hydrogen-producing batch experiments seeded with the grass composts were performed under mesophilic condition (37 oC). The batches were charged with 3wt% synthetic food wastes and control under various initial concentrations of Fe3+ and Fe2+, and pH values according experimental design.
Experimental results demonstrate that a high hydrogen production of 147 mL was observed at initial Fe2+ and pH of 42 mg/L and 5.5, respectively. In parallel, initial Fe3+ of 30.9 mg/L and initial pH of 6.0 could result a high hydrogen production of 86 mL.
Kinetic with response analysis result indicate that the batch of initial Fe2+ = 42 mg/L and pH = 5.5 would be found a high hydrogen-producing potential (Ps) of 68.64 mL H2/g TVS, a high hydrogen-producing rate (Rs) of 86.65 mL/gVSS-day and a short lag phase time (λ) of 0.5 day. In addition, initial Fe3+ =20.6 mg/L and pH = 5.5 were optimal for hydrogen production while its Ps, Rs andλwere 29.40 mL H2/g TVS, 28.22 mL/gVSS-day and 0.6 day, respectively. These were obvious that Fe2+ could stimulate anaerobic hydrogen production than Fe3+ did under various initial pH levels conducted in this study although their final pH was similar.
Keyword：Anaerobes、Iron、pH、Organic Solid Wastes、Hydrogen Production
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