| pH值对SBR生物反应器出水溶解态有机质含量与构成的影响 |
| 摘要点击 1790 全文点击 1130 投稿时间：2007-06-07 修订日期：2007-08-02 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 污水二级生化出水 二级生化出水有机物 pH值 微生物代谢产物 蛋白质 碳水化合物 单宁酸 DNA |
| 英文关键词 biologically treated sewage effluent(BTSE) effluent organic matter(EfOM) pH value soluble microbial products(SMPs) protein carbohydrate tannin DNA |
|
| 中文摘要 |
| 为探讨污水二级生化出水中有机物（EfOM）的构成特点和变化规律，采用配置生活污水，对不同pH值运行条件下，SBR生物反应器出水中的溶解态有机质（DOM）含量和构成进行了比较研究.结果表明，运行期间pH值的调节对SBR反应器出水DOM含量与构成的影响均较大.初始pH为6.5的SBR反应器，pH值降低为6.0后，出水DOC由原来的4.0 mg·L-1不断升高，进一步提高pH值，能够起到一定的缓解作用；初始pH为8.0的SBR反应器，出水DOC从4.0 mg·L-1快速降低并保持在2 mg·L-1左右，pH值降低为6.5后，DOC变化不大.单宁酸和蛋白质、碳水化合物、DNA等微生物代谢产物（SMPs）是出水DOM的主要组成部分，pH值对SMPs生成的影响是一个长期的过程，运行过程中降低pH值，造成出水SMPs含量不断升高.pH值对整个循环过程中溶解态有机物降解情况的影响，在厌氧阶段发挥了主要作用，较高pH值有利于厌氧阶段有机物的降解，而好氧阶段的有机物降解受pH值影响不大. |
| 英文摘要 |
| To discuss the characteristics of effluent organic matter (EfOM) from biologically treated sewage effluent, the impact of pH value on SBR was originally evaluated with an artificial wastewater. The results revealed that dissolved organic matter (DOM) from SBR was greatly influenced by pH value. When pH value of the SBR with original pH of 6.5 was decreased to 6.0, DOC of its effluent gradually increased from its original 4.0 mg·L-1. Further increasing pH can alleviate this increase. For the SBR with original pH of 8.0, DOC of effluent decreased rapidly from its original 4.0 mg·L-1 to 2 mg·L-1, while further decreasing pH to 6.5 did not affected this. Tannin and soluble microbial products (SMPs) including protein, carbohydrate and DNA consist to the main part of DOM in the sewage effluent. The pH value had a long-term impact on the formation of SMPs. Decreasing pH will result in its gradual increase. The impact of pH value on anaerobic process dominated the DOM degradation during the operation period. Higher pH value was helpful for the degradation of DOM. |
