Washing and Disinfection of Aqueduct Network from Polygon of the National Driving Academy Navak in Subotište

Abstract

Simply and cheap cleaning/disinfection procedure for treatment of aqueduct network from car testing polygon in Subotište was shown. Aqueduct network was exploited for three years without any water treatment. High water temperature up to 28°C and absence of disinfection, resulted in biofilm formation at pipe surface. Pipe-line was improved by cleaning and washing, neutralization, hyperchlorination and application of peroxide and silver. The effect of the process parameters (concentration and type of agent) on cleaning, washing and disinfection of pipe-line was investigated. A new, low-cost method for the use of tested chemicals based on frontal release of "plugs" was established. The results showed that prior to the treatment there was bacteriological contamination of the pipeline with Pseudomonas aeruginosa. However, after the performed cleaning, wash and water disinfection process at all points in the business premises and hydrant network, the quality of water was according to Rulebook on the bacteriological correctness of drinking water. The most effective oxidation and disinfection agent has been shown to be a composite solvent based on hydrogen peroxide and colloidal silver "Silosone" at a concentration of up to 20 mg/L.

U radu je prikazan jednostavan i jeftin postupak za čišćenje i dezinfekciju vodovodnog sistema na poligonu za ispitivanje automobila u Subotištu. Vodovodni sistem je bio u eksploataciji tri godine bez ikakvog tretmana vode. Povećana temperatura vode do čak 28°C i odsustvo dezinfekcionog sredstva uzrok je pojave biofilma u cevovodu. Cevovod je saniran čišćenjem i ispiranjem, neutralizacijom, hiperhlorisanjem i primenom peroksida i srebra. Ustanovljen je efekat operativnih parametara (koncentracija i vrsta sredstva) za proces čišćenja, pranja i dezinfekcije cevovoda. Prikazan je i novi metod frontalnog puštanja „čepova“ testiranih sredstava za čišćenje i pranje, a uz minimalnu potrošnju kako bi troškovi procesa bili što niži. Rezultati su pokazali da je pre tretmana postojalo bakteriološko zagađenje cevovoda bakterijom Pseudomonas aeruginosa. Međutim, posle izvršenih procesa čišćenja, pranja i dezinfekcije voda na svim točećim mestima u poslovnim objektima i hidrantskoj mreži, bila po Pravilniku o bakteriološkoj ispravnosti pijaće vode. Pokazano je da je najefikasnije sredstvo za oksidaciju i dezinfekciju kompozitno sredstvo na bazi vodonik peroksida i koloidnog srebra „Silozon“ u koncentraciji do 20 mg/L.