The attached file contains a publication entitled "Potential of biogas production from food waste in a uniquely designed reactor under lab conditions " describes a procedure (method) to measure dissolved biogas in anaerobic digestion of food waste at batch scale lab reactor.
Find interesting publication concerning your question:
-Raposo, F., De la Rubia, M. A., Fernández-Cegrí, V., & Borja, R. (2011). Anaerobic digestion of solid organic substrates in batch mode: an overview relating to methane yields and experimental procedures. Renewable and Sustainable Energy Reviews, 16, 861–877.
-Wang, J. Y., Zhang, H., Stabnikova, O., & Tay, J. H. (2005). Comparison of lab-scale and pilot-scale hybrid anaerobic solid-liquid systems operated in batch and semi-continuous modes. Process Biochemistry, 40, 3580–3586.
-Ihsan Hamawand * and Craig Baillie (2014). Anaerobic Digestion and Biogas Potential: Simulation of Lab and Industrial-Scale Processes. Energies 8, 454-474.