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With the development of the chemical industry, the row of organic pollutants in water bodies increase in species composition is increasingly complex. Water of organic pollutants according to their impact on the environment and pollution hazards can be divided into the oxygen consumption of easily biodegradable organic pollutants (hydrocarbons, protein, fat, etc.) and refractory organic pollutants (phenol, benzene, polycyclic aromatic hydrocarbons, etc.). At home and abroad are initially expressed in oxygen equivalents biochemical oxygen demand (BOD), chemical oxygen demand (COD) as an evaluation of water ozone-depleting a comprehensive indicator of organic pollutants. Refractory organic pollutants pollution is characterized by a long half-life in the environment, and are harmful to human health, in general, the chemical oxygen demand (COD), total organic carbon (TOC) as an evaluation of the degree of organic pollution indicators . TOC is the characterization of organic water pollutants after BOD, COD indicators to represent the total amount of carbon with organic pollutants. The concept is closely measured results have good reliability, reproducibility, simulation, easy to implement automatic, rapid, and online monitoring. In comparison with the TOC, COD, BOD two parameters were measured a long time, complicated operation, a large amount of reagent, vulnerable to interference, especially the determination of BOD, by culture temperature, the domestication of the inoculum, dilution, and many other factors influence . Relatively stable water TOC and COD, TOC and BOD between certain correlation abroad from the fifties and sixties, the conversion between these three indicators are studied, while the completion of some industries TOC instead of COD determination. China from the late 1970s to analyze the correlation between the biochemical behavior of different types of organic carbon of the water body, and these three indicators. In order to achieve the formulation of China's total amount of emissions control and environmental standards, the specific circumstances of Changchun City, select a typical surface water, sewage, pollution TOC and COD, TOC, BOD analysis by data processing, obtained a good correlation between the Changchun City, surface water, sewage, corn processing industry pollution sources TOC and CODcr, TOC and BDO in 5 , to provide a scientific basis for the development of standards for TOC emissions in China . Through this experiment to determine the Changchun City, surface water, sewage, corn processing industry wastewater treatment before and after a good correlation between TOC and COD, TOC and BOD, and provide a scientific basis for the TOC emission standards in China to develop.
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