環保專案成果報告查詢系統

專案計畫編號	EPA-98-U1U4-04-006
經費年度	098
計畫經費	2,500 千元
專案開始日期	2009/04/02
專案結束日期	2010/01/30
專案主持人	吳俊哲
主辦單位	永續發展室(停用)
承辦人	林燕柔
執行單位	凱特利斯科技股份有限公司
專案分類	水質保護
中文關鍵字	冷卻水，臭氧/觸媒氧化系統，離子交換樹脂
英文關鍵字	Cooling Water, Heterogeneous Catalytic Ozonation, Ion Exchange Resins
協同主持人	林樹榮
共同主持人
計畫聯絡人	李泔涓
計畫聯絡電話	03-4700347#
計畫聯絡信箱	leeganjiuan@hotmail.com

中文摘要	目前國內冷卻水塔的用水量高，為減少用水量，大多增加循環水的濃縮倍數，因此，相對其排放廢水中的化學藥劑量及有機物濃度高，增加廢水處理或回收的成本。而且若循環水水質的不良，亦可能會導致冷卻水塔中有機物逸散的問題，並衍生出空氣污染的問題。本計畫研發可處理冷卻水塔循環水及回收其排放廢水的技術，以臭氧與觸媒高級氧化處理為主，藉由臭氧與觸媒產生強氧化基 (OH•) 將有機物、中間產物反應成二氧化碳和水的最終產物，再以離子交換樹脂去除水中的無機鹽類（氯離子、硝酸根離子、硫酸根離子、鈣離子、鎂離子、三價鐵離子），此系統不僅可回收冷卻水塔的排放廢水，減少廢水的排放，並控制冷卻水塔水質，提高冷卻水濃縮使用之倍數，更能解決上述所提到傳統化學加藥之缺點，以有效節省水資源為永續發展之目標。本計畫執行主要分為兩個主要單元，第一階段乃提出實驗室的研究成果，第二則針對實際設備系統進行組裝及實測的工作。實驗室測試結果為：當臭氧進流濃度50 mg/L、進流流量400 mL/min、觸媒劑量627 g、蠕動幫浦流量600 mL/min、E廠冷卻水之進流流量50 mL/min，在經過兩次循環處理後，對有機物之降解效率可符合冷卻水塔水質之建議值（小於10 mg/L）；再通過陽離子交換樹脂和陰離子交換樹脂，其去除率為硬度95%、氯離子99.7%、鈣離子93%，其餘測項之去除率為100%。模廠測試乃是至E廠冷卻水塔進行實際測試，其操作條件為臭氧進流流量3 L/min、冷卻水進流流量9.5 L/min、樹脂進流流量為3 L/min，結果顯示：經本系統處理後冷卻水質為化學需氧量小於10 mg/L、導電度小於100 μS/cm、氯離子小於5 mg/L、硝酸根離子小於5 mg/L、硫酸根離子小於5 mg/L、鈣離子小於20 mg/L、鎂離子小於5 mg/L、三價鐵離子小於0.3 mg/L，皆遠低於工業用水標準，而相對去除率分別為化學需氧量大於85%、氯離子大於95%、硝酸根離子大於95%、硫酸根離子大於95%、鈣離子大於90%、鎂離子大於95%及三價鐵離子大於90%。該系統只有離子交換樹脂需3%~5%的水再生，因此，廢水回收率大於90%。冷卻水塔排放廢水經觸媒高級氧化及樹脂回收處理技術之經濟成本評估，其每噸廢水操作成本粗估為新台幣8.8元，其成本低於計畫書中預計之操作成本新台幣10元，符合原計畫書的目標，且每噸廢水總成本包含操作及設備成本為新台幣12.9元。
中文關鍵字	冷卻水，臭氧/觸媒氧化系統，離子交換樹脂

中文摘要

目前國內冷卻水塔的用水量高，為減少用水量，大多增加循環水的濃縮倍數，因此，相對其排放廢水中的化學藥劑量及有機物濃度高，增加廢水處理或回收的成本。而且若循環水水質的不良，亦可能會導致冷卻水塔中有機物逸散的問題，並衍生出空氣污染的問題。本計畫研發可處理冷卻水塔循環水及回收其排放廢水的技術，以臭氧與觸媒高級氧化處理為主，藉由臭氧與觸媒產生強氧化基 (OH•) 將有機物、中間產物反應成二氧化碳和水的最終產物，再以離子交換樹脂去除水中的無機鹽類（氯離子、硝酸根離子、硫酸根離子、鈣離子、鎂離子、三價鐵離子），此系統不僅可回收冷卻水塔的排放廢水，減少廢水的排放，並控制冷卻水塔水質，提高冷卻水濃縮使用之倍數，更能解決上述所提到傳統化學加藥之缺點，以有效節省水資源為永續發展之目標。本計畫執行主要分為兩個主要單元，第一階段乃提出實驗室的研究成果，第二則針對實際設備系統進行組裝及實測的工作。實驗室測試結果為：當臭氧進流濃度50 mg/L、進流流量400 mL/min、觸媒劑量627 g、蠕動幫浦流量600 mL/min、E廠冷卻水之進流流量50 mL/min，在經過兩次循環處理後，對有機物之降解效率可符合冷卻水塔水質之建議值（小於10 mg/L）；再通過陽離子交換樹脂和陰離子交換樹脂，其去除率為硬度95%、氯離子99.7%、鈣離子93%，其餘測項之去除率為100%。模廠測試乃是至E廠冷卻水塔進行實際測試，其操作條件為臭氧進流流量3 L/min、冷卻水進流流量9.5 L/min、樹脂進流流量為3 L/min，結果顯示：經本系統處理後冷卻水質為化學需氧量小於10 mg/L、導電度小於100 μS/cm、氯離子小於5 mg/L、硝酸根離子小於5 mg/L、硫酸根離子小於5 mg/L、鈣離子小於20 mg/L、鎂離子小於5 mg/L、三價鐵離子小於0.3 mg/L，皆遠低於工業用水標準，而相對去除率分別為化學需氧量大於85%、氯離子大於95%、硝酸根離子大於95%、硫酸根離子大於95%、鈣離子大於90%、鎂離子大於95%及三價鐵離子大於90%。該系統只有離子交換樹脂需3%~5%的水再生，因此，廢水回收率大於90%。冷卻水塔排放廢水經觸媒高級氧化及樹脂回收處理技術之經濟成本評估，其每噸廢水操作成本粗估為新台幣8.8元，其成本低於計畫書中預計之操作成本新台幣10元，符合原計畫書的目標，且每噸廢水總成本包含操作及設備成本為新台幣12.9元。

中文關鍵字

冷卻水，臭氧/觸媒氧化系統，離子交換樹脂

類型	檔名	檔案大小	說明	最新版公開日期
期末報告	冷卻水塔循環水以觸媒高級氧化處理回收再利用之技術開發.pdf	14MB		2010/6/1 上午 12:00:00

摘要	Since there is a significant demand on the circulating water for the use of cooling tower, the circulation operation with high frequency is often facilitated by many industries to moderately cut the running cost. Therefore, the accumulated concentration of chemicals and organic matters in the cooling water is relatively high, which would potentially result in the difficulties on wastewater treatment or reclamation, and even locally polluted air by organics striping as well. This project was proposed using a combined process of heterogeneously catalytic ozonation and ion exchange unit to treat the wastewater discharged from cooling water tower, where the organic compounds can be effectively oxidized by hydroxyl radicals induced via the catalytic ozonation reaction into the final products, such as carbon dioxide and water, and inorganic ions, including chloride, nitrate, sulfate, calcium, magnesium, ferric iron, are removed by ion exchange resins. Based on the operation mentioned above, the cooling water could be substantially recycled for fresh water supplement to achieve a sustainable development objective of preserving water resource. Two phases, including laboratory operation and pilot-scale system assembling and testing, were carried out in this project. It is noted that the optimal conditions, such as 50 mg/L of inlet ozone applied dosage, 400 mL/min of ozone flowrate, 627 grams of goethite catalysts, 600 mL/min of inner circulation flowrate, and 50 mL/min of inlet test sample flowrate, etc., was experimentally determined to meet the suggestion standards at chemical oxygen demand (COD) less than 10 mg/L of cooling water tower quality with the operation of two consecutive circulations. If the cooling water was subsequently treated by ion exchange processes, including anion and cation resins, the removal rates for hardness, chloride, and calcium were 95%, 99.7%, and 93%. Other than that, the removals for silicate, nitrate, sulfate, magnesium, and ferric iron were almost complete. Pilot plant was fabricated and transported to Taiwan Formosa Incorporation in Mai-liaw for in-situ practices. The operational conditions were controlled as 3 L/min of ozone flowrate and 9.5 L/min and 3 L/min of inflow cooling water through heterogeneous ozone-based AOPs and ion exchange resins, respectively. The results reveal that all concentrations in the cooling water as treated were able to meet the standards of industrial water use. The degradation rate of COD was found to be higher than 85% and the removal rate of all ion species were more than 90%. Because only 3 to 5 percent of water was necessitated for the purpose of resin regeneration, the recovery of spent cooling water would reach 90 percent at least. As for the evaluation of economic cost using AOPs and ion exchange technology, it is found that the operational cost is estimated as merely NT$ 9.8 and total cost including facility depreciation is NT$ 12.9 for per ton of cooling water treatment.
英文關鍵字	Cooling Water, Heterogeneous Catalytic Ozonation, Ion Exchange Resins

摘要

Since there is a significant demand on the circulating water for the use of cooling tower, the circulation operation with high frequency is often facilitated by many industries to moderately cut the running cost. Therefore, the accumulated concentration of chemicals and organic matters in the cooling water is relatively high, which would potentially result in the difficulties on wastewater treatment or reclamation, and even locally polluted air by organics striping as well. This project was proposed using a combined process of heterogeneously catalytic ozonation and ion exchange unit to treat the wastewater discharged from cooling water tower, where the organic compounds can be effectively oxidized by hydroxyl radicals induced via the catalytic ozonation reaction into the final products, such as carbon dioxide and water, and inorganic ions, including chloride, nitrate, sulfate, calcium, magnesium, ferric iron, are removed by ion exchange resins. Based on the operation mentioned above, the cooling water could be substantially recycled for fresh water supplement to achieve a sustainable development objective of preserving water resource. Two phases, including laboratory operation and pilot-scale system assembling and testing, were carried out in this project. It is noted that the optimal conditions, such as 50 mg/L of inlet ozone applied dosage, 400 mL/min of ozone flowrate, 627 grams of goethite catalysts, 600 mL/min of inner circulation flowrate, and 50 mL/min of inlet test sample flowrate, etc., was experimentally determined to meet the suggestion standards at chemical oxygen demand (COD) less than 10 mg/L of cooling water tower quality with the operation of two consecutive circulations. If the cooling water was subsequently treated by ion exchange processes, including anion and cation resins, the removal rates for hardness, chloride, and calcium were 95%, 99.7%, and 93%. Other than that, the removals for silicate, nitrate, sulfate, magnesium, and ferric iron were almost complete. Pilot plant was fabricated and transported to Taiwan Formosa Incorporation in Mai-liaw for in-situ practices. The operational conditions were controlled as 3 L/min of ozone flowrate and 9.5 L/min and 3 L/min of inflow cooling water through heterogeneous ozone-based AOPs and ion exchange resins, respectively. The results reveal that all concentrations in the cooling water as treated were able to meet the standards of industrial water use. The degradation rate of COD was found to be higher than 85% and the removal rate of all ion species were more than 90%. Because only 3 to 5 percent of water was necessitated for the purpose of resin regeneration, the recovery of spent cooling water would reach 90 percent at least. As for the evaluation of economic cost using AOPs and ion exchange technology, it is found that the operational cost is estimated as merely NT$ 9.8 and total cost including facility depreciation is NT$ 12.9 for per ton of cooling water treatment.

英文關鍵字

Cooling Water, Heterogeneous Catalytic Ozonation, Ion Exchange Resins