Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Denmark.
Water Environ Res. 2011 Jun;83(6):532-40. doi: 10.2175/106143010x12681059116699.
Anaerobic transformations of wastewater organic matter in the bulk water phase of collection system networks were investigated in laboratory-scale experiments. The wastewater was collected from three locations, which provided samples with different characteristics, ranging from young to mature. Hydrolysis, fermentation, and sulfate reduction were identified as the most important anaerobic processes. Significant quantities of readily biodegradable substrate were produced by hydrolysis of complex organic substrates. The readily biodegradable substrate was further fermented into volatile fatty acids (VFA). The rate of fermentation was found to be limited by the hydrolysis process. The readily biodegradable substrate generated was almost entirely composed of VFA, primarily acetic and propionic acids. A production of sulfide was observed in all experiments, demonstrating that part of the readily biodegradable substrate was consumed by sulfate respiration. The sulfide production was most pronounced in mature wastewater that had previously undergone extended anaerobic transport.
在实验室规模的实验中研究了收集系统网络的主体水相中废水有机物的厌氧转化。废水取自三个位置，这些位置提供了具有不同特征的样品，从年轻到成熟不等。水解、发酵和硫酸盐还原被确定为最重要的厌氧过程。复杂有机底物的水解产生了大量易生物降解的基质。易生物降解的基质进一步发酵成挥发性脂肪酸（VFA）。发现发酵的速率受水解过程的限制。产生的易生物降解的基质几乎完全由 VFA 组成，主要是乙酸和丙酸。在所有实验中都观察到了硫化物的产生，这表明部分易生物降解的基质被硫酸盐呼吸消耗。在先前经历了长时间厌氧输送的成熟废水中，硫化物的产生最为显著。
