International Journal of Environmental Science and Development

Abstract—In order to solve problems of raw materials present in the compost reactor are compacted blocks, poor ventilation performance, large ventilation resistance, and difficulty in homogenizing the product, a helical ribbon and screw impeller aerobic compost bioreactor was developed. Through numerical simulation of the flow field, it is proved that the helical ribbon and screw impeller has a good agitation and axial flow property. The results of the composting test show that the time above 55°C for the top, middle, and bottom layers is 5.2, 4.7, and 4.3 days. During the reaction, the oxygen concentration was over 8%, and the final seed germination index of each layer was over 88%, which proved that the experimental reactor can achieve homogenization and can be effectively harmless compost.

Index Terms—Aerobic compost, bioreactor, helical ribbon and screw impeller, CFD.

Zheng Yang, Hong Miao, and Ruihong Zhang Xunyi Ge are with College of Mechenical Engineering, Yangzhou University, China (e-mail: yangzheng329@hotmail.com, mh0514@163.com, 173622497@qq.com, zhang-rh@163.com).
Xuehao Chen is with College of Horticulture and Plant Protection, Yangzhou University, China (e-mail: xhchen@yzu.edu.cn).

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Cite: Zheng Yang, Hong Miao, Xunyi Ge, Xuehao Chen, and Ruihong Zhang, "Design and Performance of Helical Ribbon and Screw Impeller Aerobic Compost Bioreactor," International Journal of Environmental Science and Development vol. 9, no. 12, pp. 385-389, 2018.