- 期刊
屏東武洛溪跌水工程暨人工溼地水質淨化整體效益
The Study of Utilizing the Methods of Natural Stacked-drop Filtration and Purification of Constructed Wetlands to Improve the Drainage in the Wu-Luo River
摘要
武洛溪流域位於本省南端，為高屏溪下游支流，流經屏東縣九如鄉、鹽埔鄉及里港鄉等地，長久以來因生活污水及畜牧廢水影響，歷年RPI指數大多介於6.0-10.0之間，屬嚴重污染狀況，進而影響供應高屏地區民生工業用水的高屏溪。 武洛溪排水水質改善之施行有鑒於以往河川在受污染過程中已破壞原來之環境優勢，失去自淨功能，傳統水污染防治方法雖可去除或降低污染程度，卻也只能維持短暫之成效。遂利用近代推崇之生態工程－人工溼地觀念並結合「環境植栽水質改善」、「環境生態多樣性」、「水域儲水保水功能」、「環境景觀再造及教育」等四類環境價值觀概念，建造一個兼利用性、社會性及教育性之城市河川環境。 武洛溪排水水質改善工程目前為全國污水處理量最大之人工溼地，最大處理量可達50,000 CMD。其主要施工共分2期，第一期採自然跌落過濾法，藉由水躍作用增加溶氧並進行過濾及接觸式生物處理後流入兩座蓮花池進行第二次水質淨化。第二期則以3座FWS（自由水層流動系統）人工溼地進行水質處理，藉由溼地植栽與其自然淨化之原理改善水質，同時經由創造多樣化環境及多孔隙空間之設計理念進行生態復育，並提供民眾休閒遊憩之環境。 經由第一期礫石過濾床跌落曝氣、接觸式生物處理及第二期人工溼地自然淨化作用，其完工後連續30天監測，SS平均去除率為70%或低於20mg/L，BOD平均去除率為60%或低於10mg/L，可達原設計值，正式完工後於94年7月開始至95年2月實施後續監測作業，由水質監測數據顯示，依原設計抽水量50,000 CMD操作時，生化需氧量去除率可達81.6%，而懸浮固體方面去除率可達94%，與原設計值相較之下，除符合原設計功能外，去除效果有較原設計值為佳之趨勢。
並列摘要
Wu-Luo Basin located in the southern Taiwan, and it is the downstream branch of Kao-Pin River. It flows through Jiouru Township, Yanpu Township, Ligang Township, etc. Because of the influences of domestic wastewater and wastewater from pasturage, the RPI exponent of Wu-Luo Basin is between 6.0 and 10.0 over the years. It is the serious polluted situation, and it also influences Kao-Pin River where supplies the civil and Industrial water for Kao-Pin area. When the river is in the process of polluting, it also ruins the original environmental advantages, and loses its self-purification ability. Although the traditional prevention of polluted water can remove and reduce the polluted level, it only remains the effects a short period of time. According to that, drainage improvement of Wu-Luo River utilizes eco-engineering technology- the idea of constructed wetlands. It also combines four environmental valueswater bank, ecological environment, landscape, and tourism. Then, construct a surrounding of City River with utilization, social, and education. Drainage Improvement of in the Wu-Luo River is the largest constructed wetland of sewage treatment load of all in Taiwan. The highest treatment load reaches 50,000 CMD. The factory of improvement of drainage in the Wu Lo River executed two programs. Stage 1 increased the dissolved oxygen, filter, and biological treatment by water leap. Afterwards, it flowed into lotus pools to precede the second water purification. The purpose of stage 2 was to use three FWS (Free Water Surface System) constructed wetlands to do deal with water quality. Then, relied on the wetlands’ self-purification ability of environment and create the diversiform environment and multi-hole space to achieve the efficiency of water cleaning, ecological reclamation, and tourism. For solving the deterioration of water quality of Wu Lo River by pollution in long term, the first step is leaning on stage 1-aeration by gravel bed and biological treatment and stage 2-the self-purification of wetland. Stage 1's average obliterating rate of SS is 50%, or its intensity is lower than 65 mg/L; the average of obliterating rate of BOD is 30%, or the intensity is lower than 25 mg/L. Stage 2's average obliteration rate of SS is 70% or its intensity is lower than 20 mg/L; and the average obliteration rate of BOD is 60% or the intensity is lower than 10 mg/L.