Gelžbakterių veiklos intensyvinimas eksperimentiniuose smėlio koštuvuose ruošiant geriamąjį vandenį

Abstract

Nors 2-asis koštuvas buvo plaunamas intensyviau, nei 1-asis, jame gelžbakterių aptikta daugiau. Tam įtakos turėjo lėtesnis košimo greitis. Mažiausiai gelžbakterių aptikta 3-iojo koštuvo, dirbusio didžiausiu (v = 20 m/h) greičiu, užpilde.

After increasing the concentration of iron in the filtering water from 1.2 mg/l to 2.0 mg/l and of manganese from 0.1 mg/l to 0.2 mg/l, the quantity of iron bacteria at a filter bed dept 150 mm grew 10 times, therefore there were no Fe and Mn in the outlet. Although filter No. 2 was washed more intensively than filter No. 1, there were more iron bacteria in filter No. 2. The low rate of filtration (v = 10 m/h) probably has an influence on their quantity. The quantity of iron bacteria was the lowest in the bed of filter No. 3, because this filter worked more quickly (v = 20 m/h).