Development of a Statistical Model to Predict Methane Production from Waste Activated Sludge Co-Digested with Olive Mill Wastewater and Cattle Dung by Response Surface Methodology

Nowadays, population growth is likely to lead a wide variety of biomass wastes generation from the diversified human, industrial, and agricultural activities. Anaerobic digestion mostly applied manage mitigate huge spectrum environmental damages. This paper aims enhance anaerobic efficiency multicomponent substrates, using mixture waste activated sludge (WAS), olive mill wastewater (OMW), cattle manure (CM). A Response Surface Methodology employed in experimental design determine individual interactive effects on methane yield chemical oxygen demand reduction. After numerical optimization Design Expert®, optimum values test factors actual were as follows: initial pH = 8, COD/N ratio 47, 42, CM/WAS-OMW 0.352, TS 42.94 g/L. The obtained results indicate that co-digestion performance could be achieved by optimising substrate composition assure larger microbial synergistic effect.