Figure 2From: Microbial community structures differentiated in a single-chamber air-cathode microbial fuel cell fueled with rice straw hydrolysateEffluent chemical oxygen demand (COD) concentration and COD removal efficiency (RE) and coulombic efficiency (CE). The initial COD concentration was 100, 150, 200, and 400 mg/L with an external resistance of 500 Ω.Back to article page