The Effect of Pre-treatment on the Press Characteristics of Grass

Abstract

It is important to improve a rate of press in order to increase an efficiency of the grass press system. In this paper, the authors investigated the pre-treatment methods from factorial experiment for the promotional effect on grass press by using a small type apparatus. In the experiments of three selected pre-treatment methods for the six crops, the authors measured a rate of press(R_j) and consumed electric energy (E_m) by using a screw press, and obtained the linear relationships between M_i (initial water content of crop) and R_j, between M_i and E_m, between M_i and C_j (juice concentration). It was shown that the possibility of piling method having the merits from the viewpoints of required energy, promotional effect on a rate of press and crude protein distribution to juice.