| EGSB反应器在20℃下处理啤酒废水的工艺及微生物学研究 |
| 摘要点击 7329 全文点击 3072 投稿时间：2007-04-24 修订日期：2007-07-23 |
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| 中文关键词 EGSB反应器 胞外多聚物 种群结构 |
| 英文关键词 EGSB reactor ECPs microbial community structure |
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| 中文摘要 |
| 在20℃下连续运行厌氧膨胀颗粒污泥床（EGSB）反应器，对其处理模拟啤酒废水的工艺运行、污泥特性及微生物种群结构进行研究，结果表明：①HRT为18 h，经184 d的运行，EGSB反应器的有机负荷（以COD计）可达10 kg/(m3·d)，COD去除率为85%以上，去除1 kg COD可产沼气0.58 m3；②随有机负荷逐渐提高，颗粒污泥粒径逐渐增大，沉降性能逐渐提高，但当负荷达到10 kg/(m3·d)时，颗粒污泥平均粒径有变小趋势；与中温厌氧污泥相比，低温污泥的胞外多聚物（ECP）总量有较大增加，其中蛋白质含量增加明显；③与接种污泥相比，在20℃下运行不同时期污泥中产甲烷菌的种类未发生明显变化，但接种同样颗粒污泥在15℃下运行6个月后污泥中的优势产甲烷菌种发生了明显的变化. |
| 英文摘要 |
| A lab-scale EGSB reactor fed by artificial brewery wastewater was operated under 20℃ continuously, and its process performance, characteristics of granular sludge, microbial community structure were investigated. The results indicated that:①after 184 days' operation, the organic loading rate of EGSB reactor could reach 10 kg/(m3·d) at HRT of about 18 h, the COD removal efficiencies were above 85%, and the specific biogas production was about 0.58 m3 per kilogram COD removed. ②As the organic loading rate increased, the average diameter of the granule increased, and the settling velocity increased too, but when the loading rate reached about 10 kg/(m3·d), the granular average diameter decreased slightly. Compared with the granular sludge operated at mesophilic condition, the ECP contents especially the protein contents in the granular sludge operated at 20℃ increased obviously. ③Compared with the seed sludge, the main Archaea (methanogenes) species in the sludge samples operated at different loading rates under 20℃ did not change greatly, but the dominant methanogenes in the sludge operated under 15℃ for 6 months seeded with the same mesophilic sludge changed obviously. |
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