College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China; International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Shanghai Maritime University, Shanghai 201306, China.
College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China.
Bioresour Technol. 2018 Nov;268:408-414. doi: 10.1016/j.biortech.2018.08.004. Epub 2018 Aug 3.
The emissions of greenhouse gases (CO, CH, and NO) during bio-stabilization of sewage sludge under different C/N ratios with/without Eisenia fetida were evaluated in this study. Vermicomposting led to the more significant reductions of pH, TOC and C/N ratio compared to the control treatment without earthworms. C/N ratio had a significant effect on the emission of NO, whereas its influences on CO or CH emission were not obvious. Earthworms reduced the CH emission greatly, although the CO emission was not affected by earthworms. Furthermore, a higher emission of NO was observed in vermicomposting compared to the control. Both the C/N ratios and earthworms exerted statistically significant effects on the total GHG emission. Vermicomposting could enhance the degradation of organics and accelerate the mineralization process of nitrogen, whereas the increase in the C/N ratio could reduce GHG emission during vermicomposting of sewage sludge.
本研究评估了在不同 C/N 比下，有/无赤子爱胜蚓（Eisenia fetida）参与的污水污泥生物稳定化过程中温室气体（CO、CH 和 NO）的排放。与无蚯蚓的对照处理相比，蚯蚓堆肥导致 pH 值、TOC 和 C/N 比的显著降低。C/N 比对 NO 的排放有显著影响，而对 CO 或 CH 排放的影响不明显。蚯蚓大大降低了 CH 的排放，尽管 CO 的排放不受蚯蚓的影响。此外，与对照相比，蚯蚓堆肥过程中观察到更高的 NO 排放。C/N 比和蚯蚓都对总温室气体排放有统计学意义上的显著影响。蚯蚓堆肥可以促进有机物的降解，并加速氮的矿化过程，而 C/N 比的增加可以减少污水污泥蚯蚓堆肥过程中的温室气体排放。
