Study on the Effects of Adding Fe2+ and Fe3+ on Anaerobic Digestion Process of MSW19
Using three sets of small-sized bioreactors, the wet medium-temperature anaerobic digestion experiment was carried out. By monitoring the changes of pH, NH4+-N, VFA and CODCr of digested effluent as well as LFG producing process, the effects of adding Fe2+ and Fe3+ with the concentration of 0.213g/kgTS were studied comparatively on the anaerobic digestion process of MSW. The results indicate that Fe2+ and Fe3+ adding promotes the hydrolysis acidification and ammonification of microorganism in the initial period of anaerobic digestion, so that the concentration of VFA and NH4+-N increases rapidly, as its stable pH value decreases. In methanation stage, Fe2+ and Fe3+ can activate the biological activity of methanogenic bacteria,promote transformation and consumption of organic acids, protect from the accumulation of VFA, improve the removal of CODCr, and increase production and CH4 concentration of LFG. In the anaerobic digestion process, the content of propionic acid and its inhibition to LFG producing in the bioreactors with Fe2+ and Fe3+ adding gradually increase, therefore, the effective control measures ought to be taken to reduce the generation of propionic acid.
Fe2+ Fe3+ anaerobic digestion MSW LFG
Zhou Xiaozhi Sang Shuxun Cao Liwen Cheng Yunhuan
School of Resources and Geoscience, China University of Mining and Technology, Xuzhou, Jiangsu 22100 Department of Chemistry, Huaibei Coalindustry Teachers College, Huaibei, Anhui 235000, 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
310-319
2008-11-05（万方平台首次上网日期，不代表论文的发表时间）