| 高温ASBR处理热水解污泥的梯度升温法启动试验研究 |
| 摘要点击 5056 全文点击 2798 投稿时间：2008-05-27 修订日期：2008-06-24 |
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| 中文关键词 热水解污泥 厌氧序批式反应器 梯度升温 启动 PCR DGGE |
| 英文关键词 thermal-hydrolyzed sewage sludge anaerobic sequencing batch reactor (ASBR) gradient elevation of temperature startup PCR DGGE |
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| 中文摘要 |
| 采用序批式运行方式、梯度升温方法进行了高温ASBR处理热水解污泥的启动实验.结果表明，梯度升温法能在131 d内较快地启动高温ASBR反应器.在3个梯度升温阶段中（35℃→40℃→47℃→53℃），反应器的性能都出现了一定的波动，其中在中温→中温（35℃→40℃）、高温→高温（47℃→53℃）阶段出现的波动比较小，而在中温→高温（40℃→47℃）阶段反应器的产气量、甲烷含量、出水COD和反应器内微生物量都出现了较大的变化，反应器的性能波动较大，40℃和47℃分别为中温和高温的上限和下限.在反应器启动过程的稳态期，反应器的平均产气量为2.038 L/d，甲烷含量为72.0％，COD产气率（CH4/COD投入）为188.8 mL/g，TCOD和SCOD平均去除率分别为63.8％和83.3％.扫描电镜和DGGE分析结果表明，启动过程中反应器中的微生物形态和种类都发生了变化，启动初期（35℃）和稳定期（53℃）的优势菌种明显不同. |
| 英文摘要 |
| Startup experiment was conducted for thermophilic anaerobic sequencing batch reactor (ASBR) treating thermal-hydrolyzed sewage sludge using the strategy of the step-wise temperature increment: 35℃→40℃→47℃→53℃. The results showed that the first step-increase (from 35℃ to 40℃) and final step-increase (from 47℃ to 53℃) had only a slight effect on the digestion process. The second step-increase (from 40℃ to 47℃) resulted in a severe disturbance: the biogas production, methane content, CODeffluent and microorganism all have strong disturbance. At the steady stage of thermophilic ASBR treating thermal-hydrolyzed sewage sludge, the average daily gas production, methane content, specific methane production (CH4/CODinfluent), TCOD removal rate and SCOD removal rate were 2.038 L/d, 72.0％, 188.8 mL/g, 63.8%, 83.3% respectively. The results of SEM and DGGE indicated that the dominant species are obviously different at early stage and steady stage. |
