规模化奶牛场粪污处理及循环利用模式研究

Dung Treatment and Recycling Mode in Large-scale Dairy Farm

为探索现阶段规模化奶牛场粪污处理与利用切实可行的模式,通过对大同四方高科农牧公司应用的粪污处理与循环利用模式研究,从节约用水、环境污染、劳动力投入和运行资本等方面与常规模式进行对比分析。结果表明:与常规粪污处理模式相比,大同四方高科农牧公司粪污处理与循环利用模式年可处理粪便4.75万t,尿液2.70万t,污水0.91万t;通过污水循环利用,年节约用水2.63万t,节约开支302.7万元。因此,规模化奶牛场粪污通过固液分离后,尿液和污水通过循环利用,粪便发酵杀菌干燥后作为垫圈材料,对节约用水、改善环境污染、减少劳动力和能耗投入、降低运行成本、提高粪污资源利用效率等具有重要意义。

To study the feasible mode of dairy waste treatment and utilization in large-scale dairy farms, a comparative analysis between the recycling mode applied in Datong Sifang Hi-tech farming-grazing Co., Ltd and the conventional mode was carried based on water saving, environmental pollution, labor input and operation capital. The results showed that compared with the conventional mode, the recycling mode applied by Datong Sifang Hi-tech farming-grazing Co., Ltd could treat 47500 t dairy dung, 27000 t urine, 9100 t sewage per year; through the cyclic utilization of sewage, 26300 t water could be saved every year and the cost was cut by 3.027 million RMB. Therefore, after the solid-liquid separation of dung in large-scale dairy farm, urine and sewage could be cyclic utilized, and after fermentation, sterilization and desiccation, the dung could be used to padding cattle yard. The mode is very significant in saving water, reducing environmental pollution, lowering labor and energy consumption, minimizing the operation costs and improving the utilization efficiency of dairy waste.