应用废混凝土处理养猪废水中难分解之污染物

以水泥混凝土废料,用来处理养猪事业废水中难以生物分解的污染物。在台湾,大多仅以固体分离、厌氧处理、耗氧处理三个阶段来处理养猪废水。并且为减少事业用水量,所以再将处理后的废水用来清洗猪舍。然而,废水中有些成份及堆积物,是难以被微生物所分解的,所以废水回收再利用后,水中的化学需氧量将不断累积。在本研究中使用气相层析质谱仪(GC/MASS)及红外线光谱分析仪(FT-IR)对三个不同处理阶段中的废水进行大量的成份分析,分析结果显示,难以降解的污染物主要是以含苯基的氨基酸为主,并选择将混凝土废料置入废水中来去除这些成份。实验结果显示,难以处理的成份可被混凝土废料有效的去除,亦可将混凝土废料的pH降低至11以下,并可当土壤改良剂使用。

Removal of Refractory Pollutants of Swine Wastewater by Waste Concrete

In this study swine wastewater was treated with waste concrete to remove the refractory pollutants, which were difficult to be biodegraded. In Taiwan, most of the swine wastewater is treated with a three-stage process. The process includes solid separation, anaerobic reactor and aerobic reactor. Water after the aerobic reactor is partly recycled to wash the pig house for reducing water consumption. However, with the accumulation of some components that are difficult to be biodegraded, the COD of the effluent increased continuously. The refractory components in the effluent of the three-stage process were first identified by GC/MASS and FT-IR analysis. Analysis results showed that the refractory pollutants in the swine wastewater were amino acid with phenyl group. The waste concrete was chosen to remove these components. Experimental results showed that the refractory components could be removed efficiently by waste concrete. The used concrete particles have the pH value lower than 11. They can be used as a soil conditioner