牛粪螺旋压榨固液分离工艺参数优化

为了优化粪便固液分离工艺，用作者研制的固液分离机对鲜牛粪进行固液分离，以进料水料比、榨条间隙、螺旋转速作为影响因素，以分离后固形物料中总固体（TS）含量为主要考察指标，以处理牛粪生产率、液料中固体去除率为参考指标，采用3因素5水平进行二次正交旋转组合试验设计，探讨了螺旋压榨工艺参数对固液分离效果的影响，得到了优化的工艺参数：进料水料比为0.65，榨条间隙为1.5 mm，螺旋转速68 r/min时，分离后固形物料中总固体（TS）质量分数可以达到40%以上，研究结果可为牛粪固液分离提供参考依据。

Optimization on parameters of solid-liquid separation process of dairy manure by screw press

In order to optimizing the process of solid-liquid separation of manure, fresh dairy manure was separated using the developed solid-liquid separator. The water-food ratio, article squeeze gap and screw speed were selected as influence factors, total solid content (TS) after separation was as main inspected target, meantime, productivity of treated dairy manure and solid removal ratio of solid-liquid mixture were selected as independent variables. Based on the quadratic orthogonal rotating combinatorial method with three factors and five levels employed to design the experimental procedure, the effects of independent variables of screw extruded process on solid-liquid separation were analyzed. An optimum independent parameters combination for highest solid TS value of 40% was obtained with water-food ratio of 0.65, article squeeze gap of 1.5 mm and screw speed of 68 r/min. The research results can provide a reference for solid-liquid separation process of dairy manure.