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  • 高旭,马蜀,郭劲松,范莹.城市污水厂污水污泥的热值测定分析方法研究[J].环境工程学报,2009,3(11):1938-1942.DOI:    [点击复制]
  • Gao Xu,Ma Shu,Guo Jinsong,Fan Ying.Determination of the calorific value of wastewater and sludgefrom a municipal wastewater treatment plant[J].,2009,3(11):1938-1942.DOI:   [点击复制]
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城市污水厂污水污泥的热值测定分析方法研究
高旭1, 马蜀2, 郭劲松1, 范莹1
0
(1.重庆大学三峡库区生态环境教育部重点实验室,重庆 400045;2.中煤国际工程集团重庆设计研究院,重庆 400016)
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。
关键词:  污水  污泥  热值  氧弹式量热计  元素分析
DOI:
投稿时间:2008-11-12修订日期:2009-01-06
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)
Determination of the calorific value of wastewater and sludgefrom a municipal wastewater treatment plant
Gao Xu1, Ma Shu2, Guo Jinsong1, Fan Ying1
(1.Key Laboratory of the Three Gorges Reservoir Region’s EcoEnvironment, Ministry of Education, Congqing University,Chongqing 400045,China;2.Chongqing Research & Design Institute of SinoCoal International Engineering Group, Chongqing 400016,China)
Abstract:
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.
Key words:  wastewater  sludge  heat value  bomb calorimeter  element analysis