Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China.
Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China.
Water Res. 2024 Oct 1;263:122174. doi: 10.1016/j.watres.2024.122174. Epub 2024 Jul 29.
In this pilot study, a combined tandem UASB+membrane reactor (R) with high velocity settlers was proposed for the treatment of pesticide wastewater at different hydraulic retention times (HRT) and compared with a control reactor (R). The average COD removal efficiencies of the R at HRTs of 96, 72, and 48 h were 83.7 %, 82.8 %, and 74.2 %, which are 14 %, 17 %, and 21 % higher than those of the R, respectively. Throughout the operation, the biogas production of R was 33 %, 19 % and 28 % higher than that of R at the same stage, respectively, and the methane yield of R (0.19-0.26 L CH/gCOD) was improved by 10-17 % compared to that of R. Mean α values (VFA/ALK) of 0.13∼0.22 indicated that R did not undergo acidification. R reduced the extracellular polymers (EPS) content in the attached sludge by 56-62 % compared to R. It also successfully delayed membrane fouling rate by 19-22 %. The results demonstrate that the R has a high treatment capacity, stability, and methane recovery, while also effectively reducing membrane fouling.
在这项初步研究中，提出了一种串联 UASB+膜反应器（R）与高速沉降器的组合，用于在不同水力停留时间（HRT）下处理农药废水，并与对照反应器（R）进行了比较。R 在 HRT 为 96、72 和 48 h 时的平均 COD 去除率分别为 83.7%、82.8%和 74.2%，分别比 R 高 14%、17%和 21%。在整个运行过程中，R 的沼气产量分别比 R 同期高出 33%、19%和 28%，R 的甲烷产率（0.19-0.26 L CH/gCOD）比 R 提高了 10-17%。平均 α 值（VFA/ALK）为 0.13∼0.22，表明 R 没有发生酸化。与 R 相比，R 减少了附着污泥中胞外聚合物（EPS）的含量 56-62%。它还成功地将膜污染速率延迟了 19-22%。结果表明，R 具有高处理能力、稳定性和甲烷回收能力，同时有效减少了膜污染。
