Department of Chemical Engineering, College of Engineering, Qatar University, P. O. Box 2713, Doha, Qatar.
Chemical Engineering Laboratory, Faculty of Sciences and Center for Advanced Scientific Research (CICA), University of La Coruña (UDC), E-15008, La Coruña, Spain; IHE Delft Institute for Water Education, Department of Water Supply, Sanitation and Environmental Engineering, P. O. Box 3015, 2601 DA, Delft, the Netherlands.
J Hazard Mater. 2021 Mar 5;405:123735. doi: 10.1016/j.jhazmat.2020.123735. Epub 2020 Aug 22.
The treatment of waste gas (WG) containing dichloromethane (DCM) using advanced oxidation processes (AOPs) [UV and UV-TiO], biological treatment (BT), and their combination (AOPs-BT) was tested. AOP tests were performed in an annular photo-reactor (APHR), while BT was conducted in a continuous stirred tank bioreactor (CSTBR). The effects of gas flow rate (Q), inlet DCM concentration ([DCM]), residence time (τ), photocatalyst loading (PH-C) and % relative humidity (% RH) on the AOPs performance and the removal of DCM (%DCM) were studied and optimized. The UV process exhibited %DCM ≤ 12.5 % for tests conducted at a [DCM] ≤ 0.45 g/m, Q of 0.12 m/h and τ of 27.6 s, respectively, and < 4 % when the [DCM] ≥ 4.2 g/m. The UV-TiO achieved a %DCM ≥ 71 ± 1.5 % at Q of 0.06 m/h, [DCM] of 0.45 g/m, τ of 55.2 s, PH-C of 10 g/m, and %RH of 50, respectively. The BT process removed ∼97.6 % of DCM with an elimination capacity (EC) of 234.0 g/m·h. Besides, the high %DCM of ∼98.5 % in the UV-BT and 99.7 % in the UV-TiO-BT processes confirms AOPs-BT as a promising technology for the treatment of recalcitrant compounds present in WG.
采用高级氧化工艺（AOPs）[UV 和 UV-TiO]、生物处理（BT）及其组合（AOPs-BT）对含有二氯甲烷（DCM）的废气（WG）进行了处理测试。AOP 测试在环形光反应器（APHR）中进行，而 BT 在连续搅拌釜生物反应器（CSTBR）中进行。研究并优化了气流速率（Q）、入口 DCM 浓度（[DCM]）、停留时间（τ）、光催化剂负载量（PH-C）和相对湿度（%RH）对 AOPs 性能和 DCM 去除率（%DCM）的影响。UV 工艺在 [DCM]≤0.45 g/m、Q 为 0.12 m/h 和 τ 为 27.6 s 的测试中，%DCM≤12.5%，而在 [DCM]≥4.2 g/m 时，%DCM<4%。UV-TiO 在 Q 为 0.06 m/h、[DCM]为 0.45 g/m、τ 为 55.2 s、PH-C 为 10 g/m 和 %RH 为 50 时，可实现≥71±1.5%的%DCM。BT 工艺可去除约 97.6%的 DCM，消除能力（EC）为 234.0 g/m·h。此外，UV-BT 和 UV-TiO-BT 工艺中高达约 98.5%和 99.7%的高%DCM 证实了 AOPs-BT 是处理 WG 中难处理化合物的一种很有前途的技术。
