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城市污水厂污水污泥的热值测定分析方法研究
Determination of the calorific value of wastewater and sludgefrom a municipal wastewater treatment plant
投稿时间:2008-11-12  修订日期:2009-01-06
DOI:
中文关键词:  污水  污泥  热值  氧弹式量热计  元素分析
英文关键词:wastewater  sludge  heat value  bomb calorimeter  element analysis
基金项目:国家自然科学基金资助项目(50508046);教育部科学研究重大项目(308020);重庆市科委自然科学基金资助项目(CSTC2009BB0029)
作者单位
高旭 重庆大学三峡库区生态环境教育部重点实验室重庆 400045 
马蜀 中煤国际工程集团重庆设计研究院重庆 400016 
郭劲松 重庆大学三峡库区生态环境教育部重点实验室重庆 400045 
范莹 重庆大学三峡库区生态环境教育部重点实验室重庆 400045 
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中文摘要:
      建立热力学指标是污水生物处理过程热力学分析的基础工作,目前仍缺乏污水污泥化学能测试的标准方法。采用IKA C5000型自动热量计对某城市二级污水处理厂进水、出水、初沉污泥、剩余污泥、混合污泥和脱水污泥进行了热值测定,样品前处理采用103~105℃烘干获得干燥基,用苯甲酸进行加标回收。参照煤的发热量测定方法得到样品的高位热值。试验结果显示:出水干燥基的热值为05 kJ/g,进水干燥基的热值为4 kJ/g以上,各工艺段的污泥干燥基热值较高,基本都在12 kJ/g以上,接近右江褐煤水平。测定结果的标准偏差≤±0.452%,相对标准偏差≤±0.136%。通过同一批样品的元素分析及Dulong公式理论推算,发现2种方法可得到相似的结果。
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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