| 含水率对生活垃圾甲烷化过程的影响 |
| 摘要点击 1870 全文点击 1086 投稿时间：2008-04-06 修订日期：2008-05-20 |
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| 中文关键词 含水率 生活垃圾 食物类废物 纤维素类废物 厌氧甲烷化 |
| 英文关键词 moisture content municipal solid waste(MSW) food waste cellulosic waste anaerobic methanization |
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| 中文摘要 |
| 采用批式实验，通过分析产气量和气、液相组成的变化，比较了含水率分别在35%、65%～70%（田间持水率）、 80%和>95%（饱和含水率）的条件下，不同食物类废物和纤维素类废物含量的典型法国生活垃圾和中国生活垃圾以及纤维素类废物厌氧产甲烷过程的差异.结果表明，对于含易腐有机物的生活垃圾，提高含水率能够削弱VFA等中间产物对水解酸化和甲烷化的抑制作用：典型法国生活垃圾大量产甲烷所需的含水率不应低于80%，而有机物含量更高的典型中国生活垃圾直至含水率达到96%时，反应体系内快速产甲烷过程才能得以进行；同时，提高生活垃圾的含水率也有利于加速其厌氧产甲烷过程和提高甲烷的最终产量，含水率>95%的法国生活垃圾反应体系的最终甲烷产量是含水率为80%时产量的1.6倍.而对于纤维素类废物，提高含水率则能改善水分在水解和酸化过程中的可获得性，从而增大甲烷化的底物可获得量，含水率>95%的纤维素类废物反应体系的甲烷最终产量是含水率为65%时产量的3.8倍. |
| 英文摘要 |
| Biogas production，gas and liquid characteristics were investigated for comparing the effect of moisture content on methanization process of MSW with different compositions of food waste and cellulosic waste.Batch reactors were used to study the anaerobic methanization of typical Chinese and French municipal solid waste (MSW) and cellulosic waste with different moisture content，as 35%，field capacity (65%-70%)，80%，and saturated state (>95%).The results showed that for the typical Chinese and French waste，which contained putrescible waste，the intermediate product，VFA，was diluted by high content of water，which helped to release the VFA inhibition on hydrolysis and methanization.Mass amount of methane was produced only when the moisture content of typical French waste was higher than 80%，while higher content of moisture was needed when the content of putrescible waste was higher in MSW，as >95% for typical Chinese waste.Meanwhile the methane production rate and the ultimate cumulated methane production were increased when moisture content was leveled up.The ultimate cumulated methane production of the typical French waste with saturated state was 0.6 times higher than that of the waste with moisture content of 80%.For cellulosic waste，high moisture content of cellulosic materials contributed to increase the attachment area of microbes and enzyme on the surface of the materials，which enhance the waste hydrolysis and methanization.When the moisture content of the cellulosic materials increased from field capacity (65%) to saturated state (>95%)，the ultimate cumulated methane production increased for 3.8 times. |
