o:9010 In situ rehabilitation of aging public water supply wells en The main causes of well aging and consequently performance decline are incrustation from mineral scaling, biofilm development, and microbial fouling. The presented research was conducted with the aim of examination and comparison of advantages and disadvantages of different in situ rehabilitation methods for improving well yield and water quality. Mechanical approaches which include wire brushing, jetting, and surging physically remove deposits and clogs, while chemical techniques utilize acid dissolution, oxidizing and reducing agents, and chelating compounds. Chemical techniques effectively treat iron, manganese, and calcium scales. The novel biological treatments, including enzyme-based biofilm removal and bacteriophage applications, offer a promising approach to selective and sustainable prevention of fouling. As a result, the mechanisms, advantages, and limitations of each method along with safety and regulatory considerations for their use in potable water systems are analyzed. The paper emphasizes the need for well-adapted, integrated approaches to maintain longterm functionality and protect and safe public health. Well rehabilitation, incrustation, biofilm, water supply wells 1552100 978-86-7672-393-5 2026-01-27T08:45:20.116Z 44 no 46 Marija Perović Jaroslav Černi Water Institute, Belgarde, Serbia 0000-0003-2045-001X Tatjana Mitrović Institute of Physics Belgrade, University of Belgrade, Serbia person 0000-0002-5991-1445 Jelena Zarić Kovačević Mining Institute Ltd. Belgrade, Serbia person application/pdf 5389864 https://unilib.phaidrabg.rs/o:9010 no yes 1 70 92000004 71A04 Proceedings, XV International Conference Industrial Engineering and Environmental Protection 2025 (IIZS 2025), October 02-03, 2025, Zrenjanin, Serbia 349 354 Technical Faculty “Mihajlo Pupin”, Zrenjanin, University of Novi Sad, Republic of Serbia 2025