| 摘要: | 目前廢水處理系統應用的市售儀器容易受惡劣環境影響，使得感應器容易損壞、量測品質不佳、雜訊干擾、監測數據不穩定及無法即時提供監測資訊等。為了有效解決與改善惡劣環境造成的問題，以非接觸式光學方法建立廢水即時監測技術與設備，其具有快速量測、建置成本低等優點，並可有效解決及改善傳統量測或實驗分析所面臨之問題。本研究利用矩陣式感光元件與雷射二極體，並根據三角量測原理、Beer-Lambert’s law及影像處理技術發展一套可用於批次式自動控制化學混凝水及廢水處理系統水量與出流水濃度之裝置與技術。透過批次式之方式進行測試與驗證，由結果顯示，本裝置具有一定適用性與發展潛力。觀察雷射光柱穿透光與散射光強度之變化情形，依結果顯示其吸光度隨沉澱時間或水力停留時間增加而減少。根據此資訊，可同步監測沉澱過程上層液體之懸浮顆粒物濃度，並由結果顯示，預設排放水濃度25 mg/L與20 mg/L所對應的紅光與綠光吸光度值作為控制依據，並透過人工分析水質之結果作比對，其排放水皆符合預設的排放水濃度與法規標準，足以說明本量測裝置於使用上具有一定之可行性。未來於業界或實廠應用上，透過本量測設備與技術能即時反應與自動監測沉澱過程上層液體之水質是否達法定放流水之標準，作為上層液水質與調整水力停留時間之自動控制依據，以降低操作成本與提升污水處理系統之成效。 The current applied to wastewater treatment plant of commercial equipment vulnerable to adverse environmental impact, making the sensor easy to damage, poor quality measurements, noise disturbance, instability of data and lack to provide real-time monitoring information, etc... To overcome these problems effectively, the development of an automatic water quality monitoring system with the optics method that have fast quantity examine, cost low construction, etc., is efficacious to solve and improve the problem caused by the traditional method. This study uses CMOS camera and laser diodes, and in accordance with principles of triangulation, Beer-Lambert's law and the image processing technologies to development a automatic measure techniques. It can be used to simultaneous measure water level or flow rate, concentration of suspended solid of techniques. The system was built and tested on a laboratory-scale batch reactor; this device has a certain Applicability and development potential. Observation of laser beam penetrates light and scattered light intensity through the change of circumstances, according to real test and verification result, the absorbance decreased with the settling time or hydraulic retention time increasing. Base on this information, the process can be simultaneous measure the upper concentration of suspended solid of liquid, and the results showed that the concentration of discharge water to set 25 mg / L and 20 mg / L corresponding to the absorbance values of the red and green light as the control basis, and through manual analysis for comparison, are in compliance with effluent concentration, it enough to support that the measurement device is useful on the feasibility of certain. By the measurement device and technique can determine the quality of upper water is conforming to the standard on time in the future. In order to auto-control the quality of upper water and HRT, to reduce operating costs and improve the effectiveness of sewage treatment systems. |
