Effect of new high temperature aerobic composting device on maturation of chicken manure and rice chaff
YAN Chen1,, CAO Leipeng1,,, LIU Yuhuan1,, RUAN Rongsheng1,2, NING Wujian1, LIU Xiaocheng3, LI Rui3 1.State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China 2.Biological Products and Ecological Engineering, University of Minnesota, Paul 55108, United States 3.Jiangxi Tianyun Agricultural Development Co. Ltd., Nanchang, 330052, China
Abstract:In view of the problems of long composting time and serious environmental pollution in traditional composting device, the development of rapid, odorless and environmentally-friendly composting device is great significance for promoting livestock manure into organic fertilizer. The new high-temperature aerobic composting device mainly included four parts: control panel, fermenter (50 L active volume), and air compressor ventilation system (0.15 m3·s?1 discharge capacity and 40 L gas tank capacity), ammonia absorption system (188 L volume, patterns of internal ladder ring absorption), which was used to produce chicken manure-rice chaff organic fertilizer. The fertilizer efficiency of recovered magnesium ammonium phosphate (r-MAP) in chicken manure-rice chaff organic fertilizer was investigated by pot experiments. Under the optimal conditions for 40 d composting of chicken manure and rice chaff (C/N=25), the products showed the black odorless, no harmful flora, and spherical features. Moreover, the nutrients of products were 50.53% organic matter, 1.86% TN, 1.56% TP (P2O5), 1.59% TK (K2O), which basically met the national organic fertilizer (NY525-2012). The yield and polysaccharide content of water spinach obtained from chicken manure and rice chaff organic fertilizer were higher than that of chemical fertilizer. The recovery of magnesium ammonium phosphate (MAP) from ammonia recovery system could effectively improve the overall fertilizer efficiency of organic fertilizer. The results will provide a theoretical basis for the further popularization and application of the new high temperature aerobic composting device. Key words:aerobic composting/ chicken manure/ rice chaff/ organic fertilizer/ ammonia recovery/ magnesium ammonium phosphate.
图1新型高温好氧堆肥器设计图及实体图 Figure1.Illustration and stereogram of new high-temperature aerobic composting device
图2鸡粪谷壳物料在新型高温好氧堆肥器中堆肥过程中形貌图变化 Figure2.Changes of chicken manure and rice chaff morphology during composting in new high-temperature aerobic composting device
图7不同肥料条件栽培下30 d空心菜鲜重和可溶性糖含量的对比 Figure7.Comparison of fresh weight and soluble sugar content of water spinach for 30 d under different fertilizer conditions
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1.State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China 2.Biological Products and Ecological Engineering, University of Minnesota, Paul 55108, United States 3.Jiangxi Tianyun Agricultural Development Co. Ltd., Nanchang, 330052, China Received Date: 2020-08-12 Accepted Date: 2020-10-23 Available Online: 2021-03-24 Keywords:aerobic composting/ chicken manure/ rice chaff/ organic fertilizer/ ammonia recovery/ magnesium ammonium phosphate Abstract:In view of the problems of long composting time and serious environmental pollution in traditional composting device, the development of rapid, odorless and environmentally-friendly composting device is great significance for promoting livestock manure into organic fertilizer. The new high-temperature aerobic composting device mainly included four parts: control panel, fermenter (50 L active volume), and air compressor ventilation system (0.15 m3·s?1 discharge capacity and 40 L gas tank capacity), ammonia absorption system (188 L volume, patterns of internal ladder ring absorption), which was used to produce chicken manure-rice chaff organic fertilizer. The fertilizer efficiency of recovered magnesium ammonium phosphate (r-MAP) in chicken manure-rice chaff organic fertilizer was investigated by pot experiments. Under the optimal conditions for 40 d composting of chicken manure and rice chaff (C/N=25), the products showed the black odorless, no harmful flora, and spherical features. Moreover, the nutrients of products were 50.53% organic matter, 1.86% TN, 1.56% TP (P2O5), 1.59% TK (K2O), which basically met the national organic fertilizer (NY525-2012). The yield and polysaccharide content of water spinach obtained from chicken manure and rice chaff organic fertilizer were higher than that of chemical fertilizer. The recovery of magnesium ammonium phosphate (MAP) from ammonia recovery system could effectively improve the overall fertilizer efficiency of organic fertilizer. The results will provide a theoretical basis for the further popularization and application of the new high temperature aerobic composting device.