Beijing Key Laboratory for Source Control Technology of Water Pollution, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China; College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China.
Beijing Key Laboratory for Source Control Technology of Water Pollution, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China; College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China.
Sci Total Environ. 2022 Dec 10;851(Pt 2):158178. doi: 10.1016/j.scitotenv.2022.158178. Epub 2022 Aug 19.
Here, a novel combined heterotrophic and bio-electrochemical hydrogen autotrophic (CHBHA) system was developed to remove perchlorate under low chemical dosages and energy consumption. The perchlorate removal performance at various hydraulic retention times (HRTs) and acetate dosages was investigated. For influent containing 10 ± 0.10 mg/L perchlorate, the optimal removal efficiency by the CHBHA system was 98.96 ± 1.62 %, 92.99 ± 2.99 %, 97.85 ± 0.41 %, and 98.24 ± 1.56 % at different operating stages. Perchlorate was mainly removed in the heterotrophic part (H-part) at a sufficient HRT (6 h) and acetate dosage (14.75 mg/L). At other stages, perchlorate was synergistically removed by the H-part and electrochemical hydrogen autotrophic part (E-part). Since the H-part removed some perchlorate, the E-part's applied current decreased, thus reducing energy costs. The maximum current efficiency of CHBHA system was 22.09 %. Compared with the single E-part system, the combined system used 65 % less energy. Perchlorate was converted into active chlorine in the E-part, which improved the effluent quality. The bacterial community structures of the two parts were significantly different. Comamonas, Dechloromonas, Acinetobacter, and Chryseobacterium were enriched in the H-part, and the dominant genera in the E-part were Thauera, Azonexus, Hydrogenophaga, and Tissierella.
在这里，开发了一种新颖的混合异养和生物电化学自养（CHBHA）系统，以在低化学剂量和能耗下去除高氯酸盐。研究了在不同水力停留时间（HRT）和乙酸盐剂量下的高氯酸盐去除性能。对于含有 10 ± 0.10 mg/L 高氯酸盐的进水，CHBHA 系统在不同运行阶段的最佳去除效率分别为 98.96 ± 1.62%、92.99 ± 2.99%、97.85 ± 0.41%和 98.24 ± 1.56%。高氯酸盐主要在足够的 HRT（6 h）和乙酸盐剂量（14.75 mg/L）的异养部分（H 部分）中被去除。在其他阶段，高氯酸盐通过 H 部分和电化学氢自养部分（E 部分）协同去除。由于 H 部分去除了一些高氯酸盐，因此 E 部分的应用电流减少，从而降低了能源成本。CHBHA 系统的最大电流效率为 22.09%。与单一 E 部分系统相比，组合系统的能耗减少了 65%。高氯酸盐在 E 部分中转化为活性氯，从而提高了出水质量。两个部分的细菌群落结构有明显差异。Comamonas、Dechloromonas、Acinetobacter 和 Chryseobacterium 在 H 部分中富集，而 E 部分的优势属为 Thauera、Azonexus、Hydrogenophaga 和 Tissierella。
