Study on Biological Inhibition of Methane Derived from Solid Waste
The inhibition effects and mechanisms of chlorinated methane and acetylene on methanogenesis in the anaerobic digestion process of the biodegradable solid wastes were investigated. It was found that both chloroform and acetylene could effectively inhibit methanogens. Acetylene inhibited the activity of methanogens, while chloroform inhibited metabolic process of methanogenesis. A central composite design (CCD) and response surface regression analysis (RSREG) were employed to determine the optimum conditions and interaction effects of chloroform and acetylene in terms of production of methane and hydrogen. Acetylene promoted the inhibition efficiency (F = 31.14; p < 0.01) more effectively than chloroform (F = 2.46; p > 0.05). In addition, a maximum production of hydrogen of 1.6 ml was estimated under the optimum conditions of chloroform concentration of 6.69 mg/kg and acetylene concentration of 3.08×10-3 (v/v). Chloroform had significant effect on enhancing the production of propionic acid and a minimum molar ratio of acetic acid to propionic acid of 0.707 was reached with the chloroform concentration of 9.24 mg/kg and acetylene concentration of 4.0×10-3 (v/v). Hence, methanogens in the wastes can be inhibited while the stabilization process of solid wastes can still work well, as propionic acid generated during the inhibition process could hardly be utilized by methanogens.
solid waste methanogenesis biological inhibition response surface
Zhao Tiantao Zhao Youcai Zhang Lijie
State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092,PR State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092,PR Department of Bioengineering, Chongqing Institute of Technology, Chongqing 400050, PR China
国际会议
The 3rd International Conference on Waste Management and Technology(第三届固体废物管理与技术国际研讨会)
北京
英文
207-217
2008-11-05（万方平台首次上网日期，不代表论文的发表时间）