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題 名 | 三段式法處理後豬糞尿廢水之色度去除=Color Removal of the Three-Stage Treated Swine Wastewater |
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作 者 | 黃汝賢; 郭季華; | 書刊名 | 畜產研究 |
卷 期 | 31:1 1998.03[民87.03] |
頁 次 | 頁9-25 |
分類號 | 445.2594 |
關鍵詞 | 豬糞尿廢水; 色度去除; 化學混凝; 活性碳吸附; 臭氧氧化; Swine wastewater; Color removal; Chemical coagulation; Carbon adsorption; Ozonation; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究旨在探討化學混凝、活性碳吸附、臭氧氧化及其組合處理程序對養豬廢水 三段式法處理後放流水之脫色功能,並評析各單一程序及組合程序之操作費用。化學混凝採 用氯化鐵對廢水脫色效果最佳,當pH值先調整為5.5後再加入氯化鐵劑量500 mg/l時,可 得最高色度去除率(63%)。活性碳吸附採粉狀與粒狀活性碳時二者皆可用Freundlich模式描 述之,但後者之吸附量較前者小10~20倍。臭氧氧化於鹼性(pH=10.5)下廢水脫色效果均較接 近中性者(pH=8)佳;若pH值為10.5且通入臭氧劑量61 mg/l時,則可達80%色度去除率。在 粉狀活性碳吸附與化學混凝組合程序中,若調整pH,則以先化學混凝後再接活性碳吸附之效 果較佳;在化學混凝與臭氧氧化組合程序中,若先行臭氧氧化,不僅會增加混凝劑加量且會降 低色度去除率;在臭氧氧化與活性碳吸附組合程序中,若先行臭氧氧化將降低後續粉狀活性碳 之吸附量;若先以60 mg/l粉狀活性碳吸附後再通入55 mg/l臭氧(未調整pH)時,則可達80% 色度去除率。上述所有物化程序中,欲達80%色度去除率時,每m□廢水之操作費用,除單一 程序中之臭氧氧化(26元)及粒狀活性碳吸附(40.9元)外,其餘程序則介於7.6~22.1元間。 |
英文摘要 | The present study aimed to evaluate the respective functions and operation costs of chemical coagulation, activated carbon adsorption, ozonation and their integrated processes for removing color from the three-stage treated swine wastewater. In chemical coagulation, ferric chloride was the most efficient coagulant for color removal of wastewater. As the pH was adjusted to be 5.5 and a ferric chloride doasge of 500 mg/l was added, the color removal efficiency was the highest (63%). The adsorption phenomena of both powdered and granular activated carbons could be described by Freundlich isotherm. However, the adsorption capacity of granular activated carbon was ten- to twenty-fold smaller than that of powdered activated carbon. The color removal efficiency of the wastewater under the alkaline condition (pH=10.5) was higher than that under the close-to-neutral condition (pH=8). If a pH of 10.5 and an ozone dosage of 61 mg/l were maintained, 80% of color removal could be reached. In the integrated processes of chemical coagulation and powdered activated carbon adsorption, if the pH was adjusted, an integrated process of powdered activated carbon adsorption following chemical coagulation would give a better color removal efficiency. In the integrated processes of chemical coagulation and ozonation, an integrated process of chemical coagulation following ozonation would increase the coagulant dosage and decrease the color removal efficiency. In the integrated processes of ozonation and powdered activated carbon adsorption, an integrated process of powdered activated carbon adsorption following ozonation would decrease the adsorption capacity of powdered activated carbon. If a powdered activated carbon dosage of 60 mg/l prior to an ozone dosage of 55 mg/l was added (pH not adjusted), the color removal efficiency could reach 80%. If 80% of color removal, was expected, the operation costs per cubic meter of wastewater using the aforesaid processes would range from NT$7.6 to 22.1, while ozonation and granular activated carbon adsorption would cost NT$26 and 40.9, respectively. |
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