Indirect Monitoring of Anaerobic Digestion for Cheese Whey Treatment

Efficient monitoring is an open problem in the operation of anaerobic digestion processes, due to lack accurate, low-cost, and proper sensors for on-line key process variables. This paper presents two approaches indirect cheese whey wastewater. First, observability property addressed using conventional nonconventional techniques, including index. Then, model-based observer extended Luenberger observer, a sliding mode data-driven technique based on fractal analysis are formulated discussed. The performance capabilities proposed methodologies illustrated validated model with experimental data whey. Experimental pH measurements used approach analysis. sets correspond conditions (pH > 7.5 temperature (T) = 40 °C) favoring volatile fatty acid (VFA) production (30 g/L) simultaneously acceptable biogas (3420 mL). Results also show that observers were able predict satisfactory On other hand, provides reliable qualitative trends VFA chemical oxygen demand (COD) consumption.