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年度	110	專案性質	實驗性質
專案類別	研究專案	研究主題	整治
申請機構	中原大學	申請系所	環境工程學系
專案主持人	王雅玢	職等/職稱	教授
專案中文名稱	開發MD串連模組降低薄膜結垢提升重金屬污染地下水整治效益
中文關鍵字	薄膜,重金屬,整治
專案英文名稱	Remediation of heavy metal contaminated groundwater by develop membrane distillation series modules
英文關鍵字	membrane,heavy metal ,remediation
執行金額	900,000元
執行期間	2021/1/1 至 2021/11/30
計畫中文摘要	本團隊開發一套低結垢薄膜蒸餾模組系統，並且利用此系統對含鉻污染水進行測試。根據前期計畫對於使用此系統處理含鉻污染水之效能測試結果，顯示此技術可有效將污染地下水之重金屬去除，對於分離地下水中之重金屬回收及整治成效良好。為進一步探討此技術對於受重金屬污染地下水整治之可行性，提供土基會做為未來針對受重金屬污染地下水之另一選擇。本團隊在原有之薄膜蒸餾系統進料端前增設前處理系統，經由砂濾搭配超濾膜進行前處理測試，以達到減緩薄膜積垢及改善處理效率之目的。本團隊在砂濾部分選用錳砂、無煙煤、石英砂、柘榴石、濾石及麥飯石作為濾材，而在超濾膜則使用0.1μm、0.45μm、1μm及3μm四種不同孔徑之濾膜進行測試，利用實廠含鉻廢水製得之污染水進行最佳前處理材料測試，同時針對不同溫度及進料速率進行測試，分析系統最佳操作條件，並記錄模廠運轉使用之電量，進行長效性測試，以供未來之設計參數考量。 根據實驗結果，薄膜蒸餾系統在進料溫度80℃及進料速率4L/min的操作條件有最好的效果。前處理部分之測試結果則顯示，錳砂與無煙煤在不同濃度含鉻污染水中有較佳的處理效果，其中，錳砂在濁度之去除率無煙煤略高0.5~5%；錳砂在化學需氧量之去除率亦較無煙煤高2~11%。超濾膜部分以孔徑越小對各項物質去除率越高，以0.1μm在不同濃度污染水中有較好之整體表現。在不同濃度之含鉻污染水下，濁度之去除率在16~79%之間；化學需氧量之去除率範圍介於13~93%。 使用實驗測試所得之最佳操作條件及最優之砂濾濾材及超濾膜孔徑大小進行長效性測試。膜通量平均為7.40kg/m2h，不同日的通量變化並不顯著，顯示薄膜積垢對系統會造成影響較小。在6種金屬離子的分離測試中，薄膜蒸餾系統皆能維持99.5%以上的分離效率，而針對鉻離子的平均分離效率為99.96%，薄膜蒸餾系統的平均產水量為79mL/hr，平均用電量為2.58度/小時。以每度電4元估算成本，去除每毫克鉻離子需花費0.18元。
計畫英文摘要	The AGMD system was set up and applied to treat chromium contaminated wastewater. According to the result of project last year, this study successfully develops AGMD module that can be used to treat heavy metal pollutant in the groundwater. It has great efficiency on treating and recycling heavy metal in the groundwater. To further explore the feasibility of this modules for the remediation of groundwater which polluted by heavy metals. We build two pretreatment units before feeding part of AGMD, including sand filter and ultrafiltration. Improving the removal efficiency and reducing membrane fouling by using these two kinds of pretreatment unit. Six different sands have been chosen for sand filtration, Including Manganese sand, Anthracite sand, Quartz sand, Garnet sand, filter sand and Medical sand. And there have four different pore size be used for UF part, including 0.1um, 0.45um, 1um, 3um. Then we test each of them to find the best one by using wastewater contains of chromium from factory. On the other hand, we implement the test with different feed temperature and feed flow to find the best operation condition. Furthermore, we record the power consumption and do a long-term examination to supply the parameters for future design. According to the result of experiments, it is found that the flux increased with the increasing of feed temperature and feed flow rate, and the best condition are 80℃ and 4L/min feed flow rate. In pretreatment part, we focus on the Conductivity, pH, Turbidity and COD data. The result shows the top two materials of pretreatment are Manganese and Anthracite sand. Manganese sand has 0.5~5% higher turbidity removal rate, and 2~11% higher COD removal rate than Anthracite sand. The best UF pore size is 0.1um, it has 16~79% turbidity removal rate, and 13~93% COD removal rate in different concentration wastewater. The long-term experiment is conducted by combining pretreatment system and AGMD system with the best operation condition. As the experiment result, average flux is 7.40 kg/m2h. And the difference of flux is not obvious in different day. It means AGMD system isn’t affected by fouling problem seriously. The removal rate of 6 different metals are higher than 99.5%, and more than 99.96% in chromium remove rate. 79mL of sample can be treat by AGMD system per hour. The average electric consumption is 2.58 kwh. Removing 1 mg chromium will cost 0.18 NTD If the electric consumption is assumed 4NTD/kwh.