| 热水解预处理改善污泥的厌氧消化性能 |
| 摘要点击 3841 全文点击 3616 投稿时间：2004-01-15 修订日期：2004-03-23 |
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| 中文关键词 污泥 热水解 生物化学甲烷势 消化性能 厌氧消化 |
| 英文关键词 sewage sludge thermal hydrolysis BMP digestibility anaerobic digestion |
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| 中文摘要 |
| 先将污泥进行热水解预处理 ,其后测定生物化学甲烷势(BMP)来研究热水解对污泥厌氧消化性能的影响 .结果表明 ,热水解预处理能加速污泥中固体有机物的溶解 ,溶解后的有机物进一步水解生成低分子物质 ,其中挥发性有机酸占溶解性COD(SCOD)的30%～40% ,从而污泥的厌氧消化性能得到明显改善 .最合适的热水解温度和热水解时间为170℃、30min.此条件下 ,污泥厌氧消化时总COD(TCOD)去除率从预处理前的38.11%提高到56.78% ,污泥中TCOD的沼气产率从16.0mL/g提高到250mL/g . |
| 英文摘要 |
| Biochemical methane potential (BMP) experiments of thermo-hydrolyzed sewage sludge are carried out to investigate the effects of thermal hydrolysis on the digestibility of sewage sludge. The results show that thermal hydrolysis pretreatment can facilitate the dissolving of organic solid in sludge, and soluble organics hydrolyzed into low molecular organics, in which volatile fat acids accounted for 30%～40% of soluble COD, so the digestibility of sewage sludge remarkably improved. The optimum pretreatment temperature and holding time were 170℃ and 30 minutes, under which the total COD removal rate enhanced from original 38.11% to 56.78%, and biogas production rate of COD in feeding sludge from 160mL/g to 250mL/g. |
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