University of Maryland, Department of Environmental Science & Technology, College Park, MD 20742, USA.
University of Maryland, Department of Environmental Science & Technology, College Park, MD 20742, USA.
Bioresour Technol. 2021 Feb;321:124455. doi: 10.1016/j.biortech.2020.124455. Epub 2020 Nov 26.
Nanoparticle (NP) use can increase biological activity and adversely impact the environment. This study was the first to quantify biogas increases with NP mixtures during continuous anaerobic digestion (AD) of poultry litter and NP uptake in crops through tracking: 1) CH and HS production from a NP mixture (Fe, Ni, and Co) in 30 L continuous digester (AD1) for 278 days compared to a control digester (AD2) without NP addition, 2) NP degradation during digestion, 3) using AD effluent with and without NP addition as a fertilizer, and 4) plant uptake of NPs. With NP inclusion, CH production increased by 23.7%, and HS was reduced by 56.3%. The AD1 effluent had 1,160-19,400% higher NP concentrations and the lettuce biomass had 21.0-1,920% more NPs than lettuce fertilized with the AD2 effluent. This study showed that the effects of NPs remaining in the AD effluent must be considered.
纳米颗粒 (NP) 的使用可以增加生物活性并对环境产生不利影响。本研究首次定量分析了在连续厌氧消化 (AD) 鸡粪过程中 NP 混合物对沼气产量的影响，以及通过跟踪 NP 在作物中的吸收情况：1）在 30 L 连续消化器 (AD1) 中，NP 混合物（Fe、Ni 和 Co）与不添加 NP 的对照消化器 (AD2) 相比，CH 和 HS 的产生情况，2）消化过程中的 NP 降解情况，3）使用添加和不添加 NP 的 AD 废水作为肥料，以及 4）植物对 NP 的吸收情况。添加 NP 后，CH 产量增加了 23.7%，HS 减少了 56.3%。AD1 流出物中的 NP 浓度比 AD2 流出物高 1160-19400%，生菜生物量中的 NP 含量比用 AD2 流出物施肥的生菜高 21.0-1920%。本研究表明，必须考虑到 AD 废水中残留 NP 的影响。
