Determination of the Internal Chemical Energy of Wastewater
Determination of the Internal Chemical Energy of Wastewater
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DOI：
10.1021/es103058w
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发表时间：
2011-01-15
影响因子：
11.4
通讯作者：
Dolfing, J.
中科院分区：
文献类型：
--
作者：
Heidrich, E. S.;Curtis, T. P.;Dolfing, J.
废水处理行业正面临着范式转变，学会不再将生活废水视为需要处理的废物流，而是将其视为一种可以产生能源的资源。这种资源的规模是一个具有重要战略意义的问题。此前唯一公布的废水内部化学能测量值为6.3 kJ/L。长期以来，人们一直认为废水中的能量含量与化学需氧量（COD）直接相关。本研究提出了一种用于测定废水内部化学能的样品制备方法，并将其与COD测定结果进行了对比分析。通过对样品进行冷冻干燥以减少挥发性物质损失，混合废水的挥发性物质含量为16.8 kJ/L，而生活废水的挥发性物质含量为7.6 kJ/L，比之前的估计高出近20%。废水所提供的资源规模显然既复杂又多变，但很可能比以前认为的要大得多。有必要对废水中所含的能量进行系统的评估。
The wastewater industry is facing a paradigm shift, learning to view domestic wastewater not as a waste stream which needs to be disposed of but as a resource from which to generate energy. The extent of that resource is a strategically important question. The only previous published measurement of the internal chemical energy of wastewater measured 6.3 kJ/L It has long been assumed that the energy content in wastewater relates directly to chemical oxygen demand (COD). However there is no standard relationship between COD and energy content In this study a new methodology of preparing samples for measuring the internal chemical energy in wastewater is developed, and an analysis is made between this and the COD measurements taken. The mixed wastewater examined, using freeze-drying of samples to minimize loss of volatiles, had 16.8 kJ/L, while the domestic wastewater tested had 7.6 kJ/L nearly 20% higher than previously estimated. The size of the resource that wastewater presents is clearly both complex and variable but is likely to be significantly greater than previously thought A systematic evaluation of the energy contained in wastewaters is warranted.