Laboratory for Bioresource Recovery, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium.
BETA Technological Center. Futurlab, Can Baumann Ctra de Roda 70, 08500 Vic, Spain.
Bioresour Technol. 2024 Jun;402:130818. doi: 10.1016/j.biortech.2024.130818. Epub 2024 May 10.
This study aims to analyse the potential availability of essential metals including as Co, Fe, Ni, Zn, Mn, and Cu and non-essential metals such as Pb, Cr, and Cd within anaerobic mono- and co-digestion of pig manure and maize. The metals partitioning was determined using the Modified BCR (European Community Bureau of Reference) sequential extraction at defined intervals over a 45-days period, correlating changes in metals speciation with key digestion variables. The findings revealed that Cr, Cu, Fe, and Pb were predominantly associated with the oxidisable fraction, while Zn, Mn, and Cd were potentially available in both processes. Notably, NH-N and the VFAs, except propionic acid, correlated significantly with the available fractions of Co, Mn, Ni, Zn, Cr, and Pb during mono-digestion of pig manure. The wider pH range and the chemical properties of the feedstock in co-digestion resulted in varied correlations between the metals availability and the digestion variables.
本研究旨在分析在猪粪的厌氧单消化和共消化过程中，包括 Co、Fe、Ni、Zn、Mn 和 Cu 在内的必需金属以及 Pb、Cr 和 Cd 等非必需金属的潜在可用性。使用改进的 BCR（欧洲共同体参考局）顺序提取法，在 45 天的时间内确定了金属的分配情况，并将金属形态的变化与关键消化变量相关联。研究结果表明，Cr、Cu、Fe 和 Pb 主要与可氧化部分相关，而 Zn、Mn 和 Cd 在两种过程中都具有潜在的可用性。值得注意的是，NH-N 和 VFAs（除丙酸外）与猪粪单消化过程中 Co、Mn、Ni、Zn、Cr 和 Pb 的可利用部分显著相关。共消化过程中更宽的 pH 范围和原料的化学性质导致金属可用性与消化变量之间的相关性不同。
