Investigation of relationship between COD, BOD, TOC and TSS parameters in domestic wastewaters

BOD, COD, TOC and TSS parameters are very important in terms of design, operation of wastewater treatment plants and accordingly wastewater discharge criteria. All of these control parameters are used in defining organic content. BOD analysis takes five days, COD analysis takes about 3 hours, and TOC analysis takes about 1 hour. The 5 day duration of the BOD analysis is a disadvantage for these two parameters that the COD analysis yields hazardous wastes. In contrast to these, TOC analysis yields short-term results compared to BOD, while producing less hazardous waste than COD. In the light of this information, the relationship between the parameters of COD, BOD, TOC and TSS of Adana raw domestic wastewater is examined in this study. If a relation between these parameters is established, another parameter can be estimated by analyzing a parameter. COD, SCOD, BOD, SBOD, STOC and TSS analyzes were done. With the obtained values, regression analyzes were performed between COD with BOD, COD with TSS, BOD with TSS, SCOD with SBOD, STOC with SBOD and STOC with SCOD. Correlation coefficients (r) calculated as a result of regression analyzes are as follows; 0.75, 0.74, 0.41, 0.63, 0.41, 0.62.