tailieunhanh - Biogas production from corn (Zea mays) stalks: Effects of size

The results show that using corn stalks in size 8 - 10 cm produced more biogas than other sizes. Using corn stalks for biogas production help farmers improve their life conditions. | Journal of Fisheries science and Technology Special issue - 2015 BIOGAS PRODUCTION FROM CORN (ZEA MAYS) STALKS: EFFECTS OF SIZE Nguyen Le Phuong1, Le Thi Thao Quyen2, Nguyen Thi Ngoc Huyen2, Nguyen Thi Nhu Huynh2, Nguyen Thi Diem Trang2, Nguyen Vo Chau Ngan2 ABSTRACT Study on size effects of corn stalks for biogas production was evaluated for three different sizes of stalk: 15 - 20 cm, 8 - 10 cm and 1 - 2 cm. The 21 L anaerobic digesters were set up to implement experiments in laboratory conditions. All experiments were fed with loading ratio of 1 kg VS/m3*d-1, the hydraulic retention time was 60 days. The control parameters from all experiments (temperature, pH) were not significantly different between treatments but ranged in suitable values for anaerobic fermentation processes. The biogas yield and CH4 concentrations were highest at treatment with sizes 8 - 10 cm, the next was treatment of 1 - 2 cm and the lowest was treatment of 15 - 20 cm with 526 L/kg VS - , L/kg VS - and L/kg VS - in respectively. The %CH4 of all treatments tended to increase by day and kept more stable in treatment with size 8 - 10 cm than the rest. The results show that using corn stalks in size 8 - 10 cm produced more biogas than other sizes. Using corn stalks for biogas production help farmers improve their life conditions. Keywords: anaerobic digestion, batch fermentation, corn stalk I. INTRODUCTION In Vietnam, agricultural plays an important economic role. In particular, corn (Zea mays) ranked 2nd after rice in planted area and production. In the Mekong Delta, corn acreage grew from thousand hectares in 2011 with production of thousand tons to thousand hectares in 2013 with an output of thousand tons (GSO, 2013). In parallel, corn by-products also increased significantly. While a little corn stalk after harvest is fed to cattle but its efficiency is very low, the largest amount of corn stalk is biodegradable or freely burned in .

• Ngư nghiệp
• Biogas production from corn
• Effects of size
• Anaerobic digestion
• Batch fermentation
• Corn stalk