Title: Electrolised oxidised water using rainwater synthesis as an environmentally friendly disinfectant

Authors: Agus Maryono; Daniel Timotius; Muhammad Sulaiman; Andhika Puspito Nugroho; Heni Wahyu Sartika; Cristina M. Talakua; Pratama Tirza Surya Sembada; Yosef Prihanto; Eko Handoko; Agus Prasetya; Himawan Tri Bayu Murti Petrus

Addresses: Department of Civil Engineering, Vocational College, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia ' Department of Chemical Engineering, Faculty of Industrial Engineering, Universitas Pembangunan Nasional 'Veteran' Yogyakarta, Yogyakarta, 55283, Indonesia ' Graduate School of Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia ' Graduate School of Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia ' Graduate School of Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia ' Graduate School of Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia ' Graduate School of Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia ' Geospatial Research Centre, National Research and Innovation Agency (Badan Riset dan Inovasi Nasional), Cibinong, 16911, Indonesia ' Department of Chemical Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55283, Indonesia ' Graduate School of Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia ' Graduate School of Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia

Abstract: Electrolytic oxidising water (EOW) is a disinfectant and sanitary material that is classified as easy to obtain, inexpensive, safe, and environmentally friendly. This study aims to determine the effect of electrodes and mineral salt concentration on changes in the properties of EOW such as potential hydrogen (pH), oxidation-reduction potential (ORP), and total dissolved solids (TDS) at various times, determine the toxicity of EOW to earthworms (Lumbricus sp.), and the disinfecting ability against bacteria (both gram-positive and gram-negative) was measured with disc diffusion method. The water used for EOW is rainwater in Yogyakarta. The study results show that EOW water is successfully produced by an electrolysis device and the EOW water used as a disinfectant is environmentally friendly. Furthermore, the use of EOW water as a disinfectant shows the ability to inhibit gram-positive and gram-negative bacteria, which is comparable to 70% ethanol.

Keywords: electrolytic oxidising water; EOW; rainwater; disinfectant; toxicity; disinfection.

DOI: 10.1504/IJHST.2024.142051

International Journal of Hydrology Science and Technology, 2024 Vol.18 No.4, pp.445 - 458

Received: 09 Feb 2023
Accepted: 21 Sep 2023
Published online: 07 Oct 2024 *

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