Removal of gaseous dichloromethane using a solid-liquid partitioning bioreactor under gradual and stepped load increase
Removal of gaseous dichloromethane using a solid-liquid partitioning bioreactor under gradual and stepped load increase
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逐步逐步增加负荷的固液分配生物反应器去除气态二氯甲烷
DOI：
10.1016/j.ibiod.2018.06.013
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发表时间：
2018
影响因子：
4.8
通讯作者：
Chen Jian-Meng
中科院分区：
文献类型：
--
作者：
Ye Jie-Xu;Qiu Jin-Feng;Chen Jing;Chen Dong-Zhi;Cheng Zhuo-Wei;Zhang Shi-Han;Chen Jian-Meng
硅橡胶被用作两相分配生物反应器（TPPB）的固体非水相，用于去除二氯甲烷（DCM）。当通过增加气态DCM浓度，负荷从150gm−3h−1逐渐增加到485gm−3h−1时，单液相完全混合搅拌罐生物反应器（CSTB）获得了约130gm−3h−1的稳定消除能力（EC），而TPPB的EC从155gm−3h−1增强到366gm−3h−1。该结果表明 DCM 的去除是由 CSTB 中的生物过程和 TPPB 中的传质控制的。同时，由于对DCM毒性的抵抗能力不同，与TPPB中维持在580mgl−1左右的生物量相比，CSTB中的生物量从534mgl−1下降到381mgl−1。添加硅橡胶后，在高 DCM 胁迫下，脱卤酶活性保持在相对较高的水平。 TPPB 在 120gm−3h−1–450gm−3h−1 的过载情况下表现出更可靠。该论文首次报道了通过添加固体非水相将高负荷污染物去除的关键步骤从生物过程转变为传质过程。
Silicone rubber was used as the solid non-aqueous phase of two-phase partitioning bioreactor (TPPB) for dichloromethane (DCM) removal. When the load gradually increased from 150 g m−3h−1–485 g m−3h−1by increasing the gaseous DCM concentration, a steady elimination capacity (EC) of approximately 130 g m−3h−1was achieved in one-liquid-phase completely mixed stirred tank bioreactor (CSTB), whereas the EC of TPPB was enhanced from 155 g m−3h−1–366 g m−3h−1. This result indicated that DCM removal was controlled by the biological process in CSTB and by mass transfer in TPPB. Meanwhile, the biomass decreased from 534 mg l−1to 381 mg l−1in CSTB compared with that maintained at around 580 mg l−1in TPPB due to the different resistance capabilities to DCM toxicity. Dehalogenase activity was maintained at a relatively high level under high DCM stress with the addition of silicon rubber. TPPB was shown to be more dependable in the overload from 120 g m−3h−1–450 g m−3h−1. This paper is the first to report that the crucial step in high-load pollutant removal can be converted from the biological process to mass transfer by adding solid non-aqueous phase.