無隔膜電解產製弱酸性次氯酸水之研究

弱酸性電解水 (酸鹼值5.5~6..5) 是近年來開始受到重視之消毒劑，在農業領域上之應用有著不錯的抑菌效果。然而傳統製備的方式是使用鹽酸直接調整電解水酸鹼值，但此方式較危險，本研究在於比較製備弱酸性電解水的各種方法，且尋找出較安全的製備弱酸性電解水的方式並且與其他製備方式相比較。本研究主要分作三種方式製備弱酸性電解水：第一種方式為電解前調酸，此方式可分成兩個部分，第一個部分為電解氯化鉀或氯化鈉溶液與鹽酸的混合液；第二個部分為電解調酸後的氯化鉀或氯化鈉溶液，調酸過程使用氫型陽離子交換樹脂。第二種方式為電解後調酸，電解鹽水之後再使用鹽酸或者氫型陽離子交換樹脂調酸；第三種方式為電解稀釋後的鹽酸溶液。再將此三種方式做比較並探討各項優缺點。本研究成功地將氫型陽離子交換樹脂之調酸系統加入至電解水設備，使用本實驗室自製電解水機，氫型陽離子交換樹脂與電解水機結合使得可生產弱酸性電解水。可調整自由氯濃度50~200 ppm、酸鹼值固定於5.5~6.5。目前應用於植物工廠，期望此電解水機設備能夠更為廣泛使用。

關鍵字

弱酸性電解水；自由氯；抑菌；鹽酸

並列摘要

Slightly acidic electrolyzed water (SAEW) with a pH value of 5.5~6.5 begun to attract attention in disinfectant on the field of agriculture has a good antibacterial effect in recent years. However, the traditional use of hydrochloric acid to adjust the pH of the electrolyzed water is very dangerous. This research has developed a safety way to adjust pH of electrolyzed water and compared with other ways to produce SAEW. This research has three methods to adjust pH of electrolyzed water, the first method is to adjust pH of salt water (KCl or NaCl) before electrolysis, and this method can be divided into two parts: The first part is electrolysis of mixture of salt water (KCl or NaCl) and hydrochloric acid solution in a non-membrane electrolytic chamber. The second part is used hydrogen-type cation exchange resin to adjust pH of salt water, then electrolysis of acidic salt water. The second method is to adjust pH of electrolyzed water, the use of hydrogen type cation exchange resin or hydrochloric acid. The third method is produced by electrolysis of dilute hydrochloric acid. This research will compare these three methods as well as the advantages and disadvantages. In this research, the success of hydrogen type cation exchange resin of acid system added to the electrolyzed water generator (EWG). The use of homemade EWG, hydrogen type cation exchange resin with electrolyzed water combination makes EWG to produce SAEW. EWG can generate electrolyzed water at free available chlorine (FAC) 50 to 200 ppm, pH fixed at 5.5 to 6.5. This EWG currently used in plant factory. Furthermore, expect EWG can be applied more widely, such as food processing industry, greenhouse and barn etc.