12) Assume COD entering an anaerobic digester can be modeled as C3H5O3 - , and it ferments via C3H5O2 - C2H3O2 - CO2 H2. Balance this reaction. Next, assume that methane in the reactor results from two pathways: aceticlastic methanogenesis and hydrogenotrophic methanogenesis. If we assume that all necessary carbon and hydrogen for methane production comes only from fermentation of lactate; how much methane (in mg/L) can be produced assuming 25,000mg/L COD entering the anaerobic digester, with all of it being fermented