“…Hence, to achieve a successful high cell density culture (HCDC), selection of nutrient feeding strategy is critical issue (Tripathi, 2009;Choi, 2006). The exponential feeding strategy lets cells grow at a specific growth rate (Tripathi, 2009;Choi, 2006;Thiry and Cingolani., 2002) and adjust glucose concentration near zero without fluctuation thus causes minimum perturbation on cellular carbon metabolism (Choi, 2006). HCDC has several drawbacks too, including limited availability of dissolved oxygen, acetate formation and reduced mixing efficiency which amplified by scale-up (Choi, 2006;Thiry et al, 2002).…”