Organic acids, biochemical oxygen demand and chemical oxygen demand in the soluble fraction of piggery slurry
作者： Adrian G. Williams
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摘要: Close, largely linear, relationships were found between volatile fatty acids (VFA) determined by gas chromatography, total organic (TOA) colorimetrically, biochemical oxygen demand (BOD5) and chemical (COD) in the soluble fraction of piggery slurries. Samples taken from untreated aerobically-treated All correlations significant at P=0.001, with values r ranging 0.88 for correlation VFA COD, to 0.97 TOA BOD5. accounted up 69% BOD5 55% COD. It is suggested that could replace some situations, since good. Prediction COD acids, or less accurate, particularly when concentrations low, contains a biologically inert fraction, which varies storage. Soluble nitrogen was not useful predicting correlating only P=0.02.
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