豬廢水處理程序重金屬之固液相分佈研究

本研究探討生物處理程序豬廢水有機及無機污染物各處理程序去除效率。程序處理放流水基本性質的pH、溫度、懸浮固體以及化學需氧量(COD)皆符合畜牧業放流水之標準，如COD由進流水2430 mg/L降至終沉池198 mg/L。分析八個微量金屬以及四個巨量金屬顯示Fe、Cu、Ni、K、Na在處理程序液相濃度有降低趨勢，例如Fe進流水濃度592 μg/L厭氧池濃度163 μg/L。液相金屬濃度降低代表金屬重新分配，厭氧程序有機質的分解導致固相金屬濃度增加，進流水濃度2567 mg/kg上升至厭氧池濃度11640 mg/kg。透過物理分離方法，了解金屬在全溶解態(< 0.3 kDa)時佔有較高的質量分率。液相金屬有機碳標準化顯示金屬與膠體結合，因此全溶解態標準化金屬濃度較低。經過總質量平衡計算，了解金屬在程序中雖然有降低趨勢，但由於金屬吸附有機質沉降至污泥，而污泥迴流，因此液相金屬濃度較低。在有機碳標準化金屬濃度與HIX相關性分析顯示金屬Mg與HIX相關最顯著，其次為Fe，表示隨著HIX指標的上升，碳標準Fe、Mn濃度也會跟著提升。

關鍵字

豬廢水；三段式生物處理程序；金屬；有機碳；分配係數

並列摘要

This study investigated the removed efficiency of organic and inorganic contaminants by biological treatment processes in a pig wastewater treatment plant. The basic wastewater parameters of pH, temperature, suspended solids, and chemical oxygen demand (COD) in the effluent were in compliance with the standards for livestock discharge. For example, COD concentrations were 2430 and 198 mg/L in influent and final clarify tank, respectively. We analyzed eight trace metals and four macro metals in the treatment processes the results showed that the concentrations of Fe, Cu, Ni, K, and Na in the liquid phase were decreased. For example, Fe was obviously decreased from the influent concentration of 592 μg/L to the concentration was 163 μg/L in the anaerobic digestion. The decrease of liquid metal concentration indicated metal redistribution between liquid and solid phases that resulted from the decomposition of organic matter in the anaerobic process. Therefore, metal concentration in solid phase was significantly increased following the evolution of treatment processes, such as SPM Fe concentration was 2,567 mg/kg in the influent then it increased to 11,640 mg/kg in the anaerobic digestion. Through the physical separation method, the metals had the highest mass fraction in the truly dissolved fraction (< 0.3 kDa). The organic carbon standardization (OCS) of liquid metal shows that the metal is a favour to bind with colloidal phase, therefore, the truly dissolved OCS metal concentration was lower than OCS metal concentration in colloidal phase. The mass balance calculation of metal in the treatment system showed that the metals had a decreasing trend in the treatment process, however, the metal was sorbed to organic matter and then settled to the sludge tank resulted in the decrease of the liquid metal concentration decreases. The correlation between the OCS metal concentration and humification index (HIX) showed that the OCS Mg and HIX had the highest correlation coefficient, followed by Fe, that indicated the OCS Mg and Fe concentrations will increase as the HIX increases.

並列關鍵字

Pig wastewater ； three-stage biological treatment processes ； Metal ； Organic carbon ； Partition coefficient

參考文獻

周明玄，2011，鴛鴦湖湖水溶解性有機碳之來源探討，碩士論文，國立台灣大學，生態學與演化生物學研究所，台北。

Achiba, B., Lakhdar, A., Gabteni, N., Laing, G., Verloo, M., Boeckx, P., Van Cleemput, O., Jedidi, N., Gallali, T., 2010. Accumulation and fractionation of trace metals in a Tunisian calcareous soil amended with armyard manure and municipal solid waste compost. J. Hazard Mater. 176, 99e108.

Google Scholar

Balls, P., 1989, "The partition of trace metals between dissolved and particulate phases in European coastal waters: a compilation of field data and comparison with laboratory studies," Netherlands Journal of Sea Research, Vol. 23, No. 1, pp. 7-14.

Google Scholar

Barber, L. B., Leenheer, J. A., Noyes, T. I., and Stiles, E. A., 2001, "Nature and transformation of dissolved organic matter in treatment wetlands," Environmental science & technology, Vol. 35, No. 24, pp. 4805-4816

Google Scholar

Baker, A., Inverarity, R., Charlton, M., and Richmond, S., 2003, "Detecting river pollution using fluorescence spectrophotometry: case studies from the Ouseburn, NE England," Environmental Pollution, Vol. 124, No. 1, pp. 57-70.

Google Scholar

主題瀏覽