Correlation between empirical formulae based stoichiometric and biochemical methane potential of sectorial wastewater from common tannery effluent treatment plant

Feasibility of replacing the experimentally determined Chemical Oxygen Demand (CODe), Gross Calorific Energy Value (eGCEV), and Biochemical Methane Potential (eBMP), with their stoichiometric counterparts (sCOD, sCEV, and sMP), was studied. A maximum eBMP was observed for raw equalized tannery effluent (2.69 L.CH4.L−1 of reactor). Statistical correlation tests were used to compare the stoichiometric and experimental data. A Pearson's Correlation Coefficient (r) of 0.85, and Linear Regression value (R2) of 0.93 was observed for sCOD vs CODe. r value of 0.88 and R2 of 0.8 for eGCEV vs sCEV, and r value of 0.91 and R2 of 0.89 for sMP vs eBMP was observed. Thus, the empirical formulae based sCOD, sCEV, sMP demonstrated in a short time can be considered as an attractive alternative method for the tedious CODe, eGCEV and eBMP experiments for the Tannery Effluent. [Display omitted] •The impact of C,H,N,S,&O, on the COD, CEV and BMP was reported.•The eBMP was high in raw equalized tannery effluent (2.69 L.CH4.L−1 of reactor).•The stoichiometric and experimented values corroborated well with each other.•R2 of 0.89 and Pearson's r of 0.85 was observed between modelled and tested values.