| COD组分分析的实验条件及结果可靠性分析 |
| 摘要点击 2167 全文点击 1541 投稿时间：2015-02-13 修订日期：2015-04-17 |
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| 中文关键词 COD组分 呼吸法 乙酸钠 生活污水 垃圾渗滤液 |
| 英文关键词 COD components respirometry sodium acetate domestic wastewater landfill leachate |
| 作者 | 单位 | E-mail | | 李志华 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | lizhihua@xauat.edu.cn | | 张银 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | | | 韩杏 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | | | 余科 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | | | 李汝佳 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | |
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| 中文摘要 |
| 本研究尝试用SF(OURmax/OURen)代替S(0)/X(0)来作为呼吸法确定COD组分最优实验条件的参数,从而简化测量过程且可实现自动化操作. 另外由生长消耗COD与生物量的比值来判断测量结果的可靠性. 结果表明,获得可靠的RBCOD组分分析结果的实验条件为: ①对于易生物降解含量较高的水质(如由乙酸钠配制的污水),SF在2.8~5.3范围内,生长消耗COD与生物量比值在30%以内;②对于易生物降解和难生物降解物质适中的水质(如典型生活污水),SF应在5.8~6.4左右,生长消耗COD与生物量比值在30%以内;③而对于含有大量难生物降解物质的工业废水(垃圾渗滤液),SF在15以下,且生长消耗COD与生物量的比值在40%以内. 由此可见,采用呼吸法确定COD组分,其最优条件SF范围随碳源的复杂程度的上升而上升. |
| 英文摘要 |
| The present study attempts to use SF(OURmax/OURen) instead of S(0)/X(0) as an index of optimal initial conditions for determination of COD components by means of respirometry, thereby simplifying the measuring process and the operation can be automated.Further, the ratio of COD consumed by the growth of biomass can be used for the reliability assessment of results.Experimental results show that, experimental conditions for obtaining good results as follows: ①for samples that composed of a large amount of easily biodegradable components(e.g., synthetic wastewater made by sodium acetate), SF should be in the range of 2.8 to 5.3, and the ratio of COD consumed by growth of biomass should be less than 30%;②for samples that composed of both readily biodegradable and slowly biodegradable components(i.e., typical domestic wastewater), SF should be in the range of 5.8 to 6.4, and the ratio of COD consumed by growth of biomass should be less than 30%;③and for samples that composed of a large amount of slowly biodegradable industrial wastewater(i.e., landfill leachate), SF should be 15 or less, and the ratio of COD consumed by growth of biomass should be approximately 40%.Therefore, when respirometry is used for the determination of COD components, the optimal conditions in terms of SF increase with the complexity of carbon source. |
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