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首页> 外文期刊>Bioprocess and Biosystems Engineering >A modified method for COD determination of solid waste, using a commercial COD kit and an adapted disposable weighing support
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A modified method for COD determination of solid waste, using a commercial COD kit and an adapted disposable weighing support

机译：使用商业化COD套件和适用的一次性称重支架，用于固体废物COD测定的改进方法

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摘要

The chemical oxygen demand (COD) is an essential parameter in waste management, particularly when monitoring wet anaerobic digestion processes. An adapted method to determine COD was developed for solid waste (total solids > 15%). This method used commercial COD tubes and did not require sample dilution. A homemade plastic weighing support was used to transfer the solid sample into COD tubes. Potassium hydrogen phthalate and glucose used as standards showed an excellent repeatability. A small underestimation of the theoretical COD value (standard values around 5% lower than theoretical values) was also observed, mainly due to the intrinsic COD of the weighing support and to measurement uncertainties. The adapted COD method was tested using various solid wastes in the range of 1-8 mg(COD), determining the COD of dried and ground cellulose, cattle manure, straw and a mixed-substrate sample. This new adapted method could be used to monitor and design dry anaerobic digestion processes.
机译：化学需氧量（COD）是废物管理中的重要参数，尤其是在监控湿式厌氧消化过程时。针对固体废物（总固体含量> 15％）开发了一种适用的测定COD的方法。该方法使用了商品化的COD管，不需要稀释样品。使用自制的塑料称重支架将固体样品转移到COD管中。邻苯二甲酸氢钾和葡萄糖用作标准品显示出极好的可重复性。还观察到理论COD值略有低估（标准值比理论值低5％左右），这主要归因于称重支架的固有COD和测量不确定性。使用1-8 mg（COD）范围内的各种固体废物测试了改良的COD方法，确定了干燥和磨碎的纤维素，牛粪，秸秆和混合底物样品的COD。这种新的适应性方法可以用于监测和设计干式厌氧消化过程。

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