Biochemical oxygen demand data base

Valschnav, D. "Biochemical oxygen demand data base" Call, D.J. Brooke, L.T. Valschnav, D. AQUATIC POLLUTANT HAZARD ASSESSMENT AND DEVELOPMENT OF HAZARD PREDICTION TECHNOLOGY BY QUANTITATIVE STRUCTURE-ACTIVITY RELATIONSHIPS. University of Wisconsin, Superior research project report (CR809234) 1984. 

Molecular connectivity indices are desirable as potential explanatory variables because they can be calculated for a nominal cost (fractions of a second by computer) and they describe fundamental relationships about chemical structure. That Is, they describe how non-hydrogen atoms of a molecule are "connected". Here we are most concerned with the statistical properties of molecular connectivity Indices for a large set of chemicals In TSCA and the presentation of the results of multivariate analyses using these Indices as explanatory variables to understand several properties important to environmental chemists. We will focus on two properties for which we have a relatively large data base (1) biodegradation as measured by the percentage of theoretical 5-day biochemical oxygen demand (B0D)( 11), and (2) n-octanol/water partition coefficient or hereafter termed log P (12). 

The following 5-day biochemical oxygen demand (BOD5) and total suspended solids (TSS) data were collected from a clarifier at a local municipal wastewater treatment plant over a 7-day period. The National Pollutant Discharge Elimination System (NPDES) permit limitations for BOD5 and TSS effluent concentrations from this wastewater treatment plant are 45mg/L on a 7-day average. Based on this information, is the treatment plant within its NPDES permit limits ... 

For organic compounds, evaluation of their environmental impact based on data for acute toxicity to fish and estimation of biochemical oxygen demand has been steadily replaced by the results of experiments on subacute and chronic toxicity, sophisticated investigations of microbial metabolism, and an appreciation of the true complexity of partitioning processes. It may... 

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