• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Water Science and Technology >Optimization of the performance of an integrated anaerobic-aerobic system for domestic wastewater treatment
【24h】

Optimization of the performance of an integrated anaerobic-aerobic system for domestic wastewater treatment

机译：厌氧-好氧综合系统处理生活污水的性能优化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A promising system consisting of Up-flow Anaerobic Sludge Blanket (UASB) and Down-Flow Hanging Sponge (DHS) system was investigated for removal of COD, BOD5 fractions, ammonia and faecal coliform from domestic wastewater. The combined system was operated at different HRTs of 16, 11 and 8 h. The results indicate that increasing the total HRT from 8 to 16 h significantly ( p, 0.05) improves the CODtotal and BOD5 (total) removal mainly as a result of a higher removal of CODsoluble, BODsoluble, CODparticulate and BODparticulate. The main part of coarse suspended solids was removed in the UASB reactor (76.4 +/- 18%) and the remaining portion was adsorbed and/or enmeshed and degraded in the biomass of the DHS system. The combined system achieved a substantial reduction of total suspended solids (TSS) resulting in an average overall percentage removal of 94 +/- 6% (HRT 16 h) and 89.5 +/- 7.8% ( HRT 8 h). Faecal coliform reduction was significantly improved when increasing the total HRT from 8 to 16 h. Residual counts of faecal coliform were 3.1 x 10(3)/100 ml at a total HRT of 16 h, and 2.8 x 10(4)/100 ml at total HRT of 8 h, corresponding to overall removal efficiency of 99.97 +/- 0.03 and 99.6 +/- 0.3% respectively. Despite the increase of ammonia concentration as a result of protein hydrolysis in the UASB reactor, a substantial removal of ammonia was achieved in the DHS system. The results obtained show that decreasing the OLR imposed to DHS system from 2.6 to 1.6 kgCOD/m(3).d significantly (p, 0.05) improves the removal efficiency of ammonia by a value of 29%. However, the removal efficiency of ammonia is not further increased when decreasing the OLR from 1.6 to 1.3 kgCOD/m(3).d. The discharged sludge from UASB + DHS system exerts a good settling property and partially stabilized. DHS profile results have shown that the major part of COD, BOD5, and TSS was removed in the upper part of the system, consequently, the nitrification process was occurring in the lower part of the DHS system.
机译：研究了一种有前途的系统，该系统由向上流动的厌氧污泥毯（UASB）和向下流动的悬浮海绵（DHS）系统组成，用于从生活废水中去除COD，BOD5馏分，氨和粪便大肠菌群。组合系统在16、11和8小时的不同HRT下运行。结果表明，将总HRT从8 h增加到16 h显着（p，0.05）改善了CODtotal和BOD5（总）去除率，这主要是由于COD可溶性，BOD可溶性，COD颗粒和BOD颗粒去除率更高。粗悬浮固体的主要部分在UASB反应器中除去（76.4 +/- 18％），其余部分在DHS系统的生物质中吸附和/​​或嵌入和降解。组合系统实现了总悬浮固体（TSS）的大幅减少，从而平均去除了94 +/- 6％（HRT 16 h）和89.5 +/- 7.8％（HRT 8 h）。当将总HRT从8小时增加到16小时时，粪便大肠菌群的减少显着改善。粪便大肠菌群的残留计数在总HRT为16 h时为3.1 x 10（3）/ 100 ml，在总HRT为8 h时为2.8 x 10（4）/ 100 ml，对应于总去除效率为99.97 +/-分别为0.03和99.6 +/- 0.3％。尽管由于UASB反应器中蛋白质水解而使氨浓度增加，但在DHS系统中仍实现了氨的基本去除。获得的结果表明，将DHS系统施加的OLR从2.6 kgCOD / m降低至1.6 kgCOD / m（3）.d（p，0.05），可使氨的去除效率提高29％。但是，将OLR从1.6 kgCOD / m降低到1.3 kgCOD / m时，氨的去除效率不会进一步提高（d）。 UASB + DHS系统排出的污泥具有良好的沉降性并部分稳定。 DHS曲线结果表明，COD，BOD5和TSS的大部分在系统的上部被除去，因此硝化过程发生在DHS系统的下部。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号