Optimization of electrolyzed water production for cleaning application using response surface methodology (RSM)

Sulaiman, Nurul Shaqirah (2018) Optimization of electrolyzed water production for cleaning application using response surface methodology (RSM). [Project Paper] (Submitted)

Text FK 2018 47.pdf Download (36MB)

Abstract

The aim of this study was to develop proper electrolyzed technique and evaluate the characteristics of electrolysed water at optimal condition to be applied as cleaning medium in food industry. Electrolyzed water known as green cleaner is expected to help food industry in achieving hygienic environment in their factory and at the same time minimizing the cleaning cost. Acidic electrolyzed water (AcEW) and neutral electrolyzed water (NEW) have a strong bactericidal effect on various types of food borne pathogens for many types of food products and food equipment surfaces. While alkaline electrolyzed water (AlEW) has a potential as cleaning medium alternative for alkaline wash. Effect of electrolyzing parameters ( electrode type, NaCl concentration, electric current and electrolysis time) on chemical and physical properties (pH, oxidation-reduction potential (ORP), total chlorine and free chlorine) of electrolyzed water (alkaline, acidic, and neutral electrolyzed water) were optimized by using Response Surface Methodology (RSM). From the RSM and Box Behnken Design (BBD), an optimal condition for AcEW is obtained at 0.1 wt% NaCl concentration, 30 minutes electrolysis time and 24 V to produced 3.30 pH, 921.163mV, 0.33mg/I free chlorine and 0.37mg/l total chlorine. For AlEW, the optimized condition is at l .0wt¾ NaCl concentration, 30 minutes electrolysis time and 24V in order to produce the optimum values of responses 11.37 pH values, - 898.996mV, 0.21 mg/I free chlorine and 0.20mg/I total chlorine. The shelf life of electrolyzed water generated from this electrolyzing unit are investigated where the electrolyzed water were stored in tight closed dark-brown glass bottles at room temperature. The chemical and physical properties of electrolyzed water are measured for 24 hours of storage. It shows reduction in pH, ORP, free chlorine where for AcEW 7.64%, 27.9% and 24.1 % while for AIEW 0.27%, 76% and I 0.5% respectively in percentage of reduction. The results suggest that the electrolyzed water to be used on the same day of generation for efficient effects.

Item Type:	Project Paper
Subjects:	T Technology > T Technology (General)
Faculty:	Faculty of Engineering
Depositing User:	Ms Siti Mariam Giman
Date Deposited:	13 May 2026 09:22
Last Modified:	13 May 2026 09:22
URI:	http://psaspb.upm.edu.my/id/eprint/2809

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