Christian Evelyn, Batista Jacimaria R, Gerrity Daniel
Water Environ Res. 2017 Feb 1;89(2):168-177. doi: 10.2175/106143016X14504669768976. Epub 2016 Apr 7.
Common to all National Pollutant Discharge Elimination System (NPDES) permits in the United States is a limit on biochemical oxygen demand (BOD). Chemical oxygen demand (COD), total organic carbon (TOC), and fluorescence spectroscopy are also capable of quantifying organic content, although the mechanisms of quantification and the organic fractions targeted differ for each test. This study explores correlations between BOD5 and these alternate test procedures using facility influent, primary effluent, and facility effluent samples from a full-scale water resource recovery facility. Relative reductions of the water quality parameters proved to be strong indicators of their suitability as surrogates for BOD5. Suitable correlations were generally limited to the combined datasets for the three sampling locations or the facility effluent alone. COD exhibited relatively strong linear correlations with BOD5 when considering the three sample points (r = 0.985) and the facility effluent alone (r = 0.914), while TOC exhibited a suitable linear correlation with BOD5 in the facility effluent (r = 0.902). Exponential regressions proved to be useful for estimating BOD5 based on TOC or fluorescence (r > 0.95).
美国所有国家污染物排放消除系统（NPDES）许可证的一个共同之处是对生化需氧量（BOD）的限制。化学需氧量（COD）、总有机碳（TOC）和荧光光谱法也能够对有机含量进行量化，尽管每种测试的量化机制和针对的有机组分各不相同。本研究使用来自一座全规模水资源回收设施的设施进水、初沉出水和设施出水样本，探索五日生化需氧量（BOD5）与这些替代测试方法之间的相关性。水质参数的相对降低被证明是其作为BOD5替代指标适用性的有力指标。合适的相关性通常仅限于三个采样地点的综合数据集或仅设施出水的数据集。考虑三个采样点时，COD与BOD5呈现出相对较强的线性相关性（r = 0.985），仅设施出水时（r = 0.914）也是如此，而TOC在设施出水中与BOD5呈现出合适的线性相关性（r = 0.902）。事实证明，指数回归对于基于TOC或荧光估算BOD5很有用（r > 0.95）。
