製備與保存低鹽無隔膜電解水之理論探討與設備開發

Theoretical Investigation and Development of the Equipment for Producing and Preserving Low Salinity Electrolyzed Water

鍾佩如(Pei-Ru Chong)

指導教授 ： 方煒

國立臺灣大學/生物資源暨農學院/生物產業機電工程學研究所/碩士(2010年)

https://doi.org/10.6342/NTU.2010.00789

摘要

本研究旨在探討低鹽無隔膜電解水的特性與製作條件，並據以開發低鹽電解水產製系統應用於空氣滅菌。以電流效率為設備產製自由氯的能力指標，以導電度為氯化鉀（KCl）溶液含鹽度的判斷標準。
研究結果指出，電解水的導電度與電解前KCl溶液的導電度相同，可直接經由調控KCl溶液的濃度來控制電解水的導電度。低溫、遮光與密封皆可延長電解水的保存時間。將鹼性電解水遮光與密封保存是較佳的長期保存方式；但由於弱酸性電解水有較佳的抑菌效力，因此應於調酸後立即使用，或直接以低濃度KCl溶液產製電解水，可避免因自由氯濃度快速下降，而影響電解水的抑菌效力。
適合製作低鹽電解水的KCl濃度為0.3∼0.4 M，適宜產製自由氯的電解水溫度為15∼45oC，降溫的設計對於低鹽電解水的製程是必要的。
結合自動化調配鹽濃度與調酸功能，本研究開發了低鹽電解水產製系統。可自動生產弱酸性低鹽電解水（pH=6∼6.5，FAC = 50 ppm，EC = 0.26 mS/cm），能有效用於農業抑菌且無鹽害的問題。本研究亦結合低鹽電解水產製系統與超音波造霧，開發了批次與連續式兩型設備可應用於局部空間之滅菌。

關鍵字

無隔膜電解水 ； 導電度 ； 自由氯 ； 保存 ； 滅菌

並列摘要

The purposes of this study were to investigated the properties of low salinity membrane-less electrolyzed water (LS-MLEW) and the operating conditions to generate such water. Electrolysis-current-efficiency was used as an index to evaluate the capability of system developed in producing free available chlorine (FAC). The electrical conductivity (EC) was used as another index for the determination of the salinity of potassium chloride solution (KCl).
Experimental results indicate that the EC value of electrolyzed water (EW) remains unchanged before and after the electrolysis process, thus making EC a suitable index for the control of salinity of EW. EW should be stored in low temperature, dark, and sealed conditions. For long-term storage, EW at pH equals 10 is better than pH equals 6. However, EW at pH equals 6 is better than pH equals 10 in terms of disinfection capability. In conclusion, it is better to use EW immediately after pH adjustment (from 10 to 6) to prevent dissipation of FAC.
The proper range of electrolyte concentration for generating LS-MLEW was 0.3∼0.4 M. And the suitable temperature of electrolysis was 15∼45oC. Cooling is required when developing LS-MLEW electrolysis equipments.
A system consists of LS-MLEW electrolysis component, salinity concentration adjustment component and pH-adjustment component was developed. The system can generate LS-MLEW (pH=6∼6.5，FAC = 50 ppm，EC = 0.26 mS/cm）.
The system described above can produced EW in either batch type or continuous type. Both types were combined with ultrasonic atomizing component to develop two machines to be used for disinfection of indoor air.

並列關鍵字

membrane-less electrolyzed water ； EC ； FAC ； storage ； disinfection

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