| 城市污水廠污水污泥的熱值測定分析方法研究 |
| Determination of the calorific value of wastewater and sludgefrom a municipal wastewater treatment plant |
| 投稿時間：2008-11-12 修訂日期：2009-01-06 |
| DOI： |
| 中文關鍵詞: 污水 污泥 熱值 氧彈式量熱計 元素分析 |
| 英文關鍵詞:wastewater sludge heat value bomb calorimeter element analysis |
| 基金項目:國家自然科學基金資助項目(50508046);教育部科學研究重大項目(308020)；重慶市科委自然科學基金資助項目（CSTC2009BB0029） |
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| 摘要點擊次數: 13918 |
| 全文下載次數: 5686 |
| 中文摘要: |
| 建立熱力學指標是污水生物處理過程熱力學分析的基礎工作，目前仍缺乏污水污泥化學能測試的標準方法。采用IKA C5000型自動熱量計對某城市二級污水處理廠進水、出水、初沉污泥、剩余污泥、混合污泥和脫水污泥進行了熱值測定，樣品前處理采用103～105℃烘干獲得干燥基，用苯甲酸進行加標回收。參照煤的發(fā)熱量測定方法得到樣品的高位熱值。試驗結果顯示：出水干燥基的熱值為0?5 kJ/g，進水干燥基的熱值為4 kJ/g以上，各工藝段的污泥干燥基熱值較高，基本都在12 kJ/g以上，接近右江褐煤水平。測定結果的標準偏差≤±0.452%，相對標準偏差≤±0.136%。通過同一批樣品的元素分析及Dulong公式理論推算，發(fā)現2種方法可得到相似的結果。 |
| 英文摘要: |
| It’s a primary step to establish thermodynamic indices for thermodynamic analysis of biological wastewater treatment processes, unfortunately standardized measurement method for chemical energy within wastewater and sludge has not been developed. An automatic calorimetric method was adopted to determine calorific values of influent, effluent, primary sedimentary sludge, surplus sludge, mixed sludge and dehydrated sludge samples from several municipal wastewater treatment plants. The samples were dried at 103～105℃ during preparing course and the quality control scheme of determination was set up. Referring to calorific value measurement of coal, gross calorific values of samples were acquired. The result indicates that the calorific value of effluent dry basis is 0.5 kJ/g, and that of the influent is above 4 kJ/g; moreover, the calorific values of the sludge samples are as high as above 12 kJ/g which is close to the Youjiang lignite’s level. The standard deviations (SD) of the test results are all less than±0.452% and the relative standard deviations (RSD) are no more than 0.136%. Based on the element analysis of the same set of samples, the calorific values were also calculated with the Dulong formula. The results of the two methods are pretty close. |
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