英文篇名
An Introduction of Multi-Soil Layering Wastewater Treatment System
作者
何嘉浚、陳俊瑋
關鍵字
點源污染、非點源污染、呈層複合土壤水質淨化系統、分散式污水處理
摘要
河川或水庫等水體污染源主要來自於點源污染及非點源污染,在現今水資源日益短缺且環保意識抬頭的同時,改善水體水質是世界各國所共同努力的課題,更是目前政府「前瞻基礎建設」之「水環境建設」中相當重要的一項工作。臺灣目前對於點源污染的處理大都採用污水下水道系統再配合諸如人工濕地等自然淨化系統,但一來建設曠日廢時且成本高,二來對於諸如鄉村或水庫集水區上游之住宅分散地區難以有效推行;有鑑於此,日本於1988年發展呈層複合土壤水質淨化系統(multi-soil layers, MSL),其對於分散式污水處理有著卓越的功效。本研究針對MSL進行本土化材料的適用性探討,發現該系統能有效淨化生活污水,對於氨氮(NH3-N)的去除率可達到99.89%、化學需氧量(COD)可達到93.65%、總磷(TP)為96.38%、磷酸鹽(PO43-)為98.27%、懸浮固體(SS)則可達到75.49%,再加上設施操作時低維護與少管理,且系統使用壽命平均可達20年以上,故非常適合推廣於處理農村或水庫集水區上游之分散式聚落的生活污水。
英文摘要
Contamination of water bodies can be due to point source and nonpoint source pollution. In addition, eutrophication of reservoirs and rivers is a serious source of water pollution. Nowadays, many countries in the world strive to improve the water quality. In recent years, the Taiwanese government has the Forward-Looking Infrastructure Development Program which focuses on improving the water quality and the new water environments. The sewerage treatment system in Taiwan is often built with a natural treatment system, such as an artificial wetland, to reduce the point source pollution. However, this set-up is time consuming, costly and is not suitable for use in the residential area. Since 1988, Japan has been developing the Multi-Soil-Layering system (MSL) which is found to yield a high efficiency in purifying the sewage. In this study, we evaluate the feasibility and performance of the MSL that was adopted in Taiwan. The experimental results show that the MSL has a removal rate of 99.89% for NH3-N, 93.65% for COD, 96.38% for TP, 98.27% for PO43- and 75.49% for SS. In addition, the MSL has a low maintenance and management cost. As the service life of the MSL system may exceed 20 years, it is very suitable for use in the rural area, as well as the upstream of the catchment area of the reservoir.