我国工业危险废物的来源、处理及监管对策与建议

通过大量环境统计数据的分析,对我国工业危险废物的产生、综合利用、处置和贮存,从行业来源、区域分布进行了分析和总结。结合我国工业危险废物企业自建设施和政府集中处理设施处理情况,对我国工业危险废物的处理和环保监管对策提出了若干建议。

EFFECT OF IRON DIOXIDE ADDITION MODES ON METHANE GENERATION IN FOOD WASTE ANAEROBIC DIGESTION

This study investigated the effect of different iron dioxide addition modes on methane generation in food waste anaerobic digestion.Three reactors were constructed to simulate different scenarios:A (food waste and anaerobic sludge),B (food waste and anaerobic sludge,iron oxide added after 48 h when the food waste acidized),C (food waste,anaerobic sludge and iron oxide).The result showed that the addition of iron dioxide could relieve acid inhibition and accelerate the generation rate of methane.By the end of the experiment,no methane was generated in reactor A,while the accumulate methane yield in B and C was 35 665 mL and 48 349 mL,respectively.In addition,the addition mode of iron dioxide played an important role in methane generation from food waste.Comparing to adding iron dioxide after acidification,adding iron dioxide at the beginning of anaerobic digestion could effectively relieve acidification and produce methane at faster rate.