グルコン酸ソーダ生産時に於けるpH自動制御に就いて

概要

論文の詳細を見る
In sodium gluconate production from glucose by Asp. niger, pH was automatically controlled within ±0.05 units of the setting.The methods are summarized as follows.1. The beer was circulated continuously from the bottom of fermenter, through the side tube, to above the level of liquid surface with the simple aid of air lift to measure it's pH.2. pH indicator-recorder was used as a recorder-controller by furnishing it with a sparkless relay on which a flapper was fixed. In this connection, this relay played a part of electro-pneumatic converter which operated the regulator valve through a nozzle and a pilot valve.3. A capillary-flow type valve was used as a regulator valve and was found to operate sucessfully while additions of concentrated sodium hydroxide solution were made.
社団法人日本生物工学会の論文
1961-06-15