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DOI : 10.17640/KSWST.2018.26.2.93 , Vol.26, No.2, 93 ~ 100, 2018
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| Title |
| A Study on the Amount of VFAs in the Mixing Ratio of Livestock and Food Waste in Anaerobic Water Treatment System |
| 성낙창 Nak-chang Sung , 권민지 Min-ji Kwon , 정진희 Jin-hee Jung , 최영익 Young-ik Choi |
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| Abstract |
| The overall food consumption in South Korea has increased along with economic growth. Especially, meat consumption has increased significantly, and the size of the animal production industry has also grown greatly. As a result, substantial amounts of livestock wastewater and food waste are being produced. Among them, anaerobic digestion is known as a method of acquiring energy by treating wastes and producing biogas at the same time. This anaerobic digestion process generates organic acids by acid-producing bacteria. When the amount of generated organic acids increases, the pH drops which might be toxic. The purpose of this study is to maintain the optimum pH during anaerobic digestion to control the decrease in digestion efficiency due to a drop in pH by simultaneously treating livestock waste, which have a relatively high pH, without using pH regulators. Three reactors, R1, R2, and R3, were used in this experiment, and each reactor contained a mixture of food waste and livestock wastewater at the ratio of 5:5, 7:3, and 3:7, respectively. After 25 days, R3, the reactor in which the food waste and livestock wastewater were mixed at the ratio of 3:7, showed the optimum or near-optimum organic acid concentration and pH values. |
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| Key Words |
| Anaerobic digestion, Food waste water, Livestock manure, VFA, pH |
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