Lucrarea prezintă efectul tratării sonice asupra indicatorilor microbiologici ai apei brute, precum şi ai apei în care s-au adăugat coagulanţi utilizaţi în prezent la tratarea apei potabile, şi anume sulfatul de aluminiu (Al2(SO4)3) şi polihidroxiclorura de aluminiu (Kemwater PAX 18). Pentru toţi indicatorii studiaţi, efectul scăderii se obţine brusc după primele 5 secunde de tratare. Cel mai mare efect se obţine la reducerea numărului de streptococi de circa 20 de ori. Numărul probabil de coliformi fecali şi totali scade de 8 ori, iar numărul total de germeni scade de 5-6 ori. S-a determinat timpul minim de tratare sonică a apei pentru obţinerea efectului antibacterian, care este de t=5–10 s. Se recomandă polimerul PAX ca adjuvant la tratarea sonică a apei.

The paper presents the effect of the sonic treatment on the microbiological indicators of the raw water, as well as of the water in which we add the coagulation agent that are commonly usable for the potable water treatment namely the aluminium sulphate Al2(SO4)3 and the poli-hydroxy aluminium chloride (Kemwater PAX 18). For all the examined indicators the effect of decrease is obtained brusque after the first 5 seconds of treatment. The most effect is obtained for the streptococcus number reduction that is about 20 times. The faecal and total colophormes decrease of 8 times and the total number of germs with 5-6 times. It was determined the minimal time of the water sonic treatment for antibacterial phenomenon which is t=5–10 s. We recommend the aid of polihydroxy aluminium chloride (Kemwater PAX 18) for water sonic treatment.

Le travail offre le effet de le traitement sonique sur les indicateur microbiologique de l’eau brute, aussi et de l’eau dans lequel nous additionne des coagulant utilise actuellement pour traitement de l’eau potable le sulfate d’aluminium Al2(SO4)3 et le poli-hydroxyde chlorure d’aluminium (Kemwater PAX 18). Pour tous les indicateur examine le effet de baisse d’obtenir brusque âpres 5 seconds de traitement. Le meilleur effet d’obtenir la baisse de le numéro streptococcies de 20 fois. Le numéro de coliformes fécal et total baisse par 8 fois, et le numéro de germes par 5-6 fois. Le temps minimum pour traitement sonique de l’eau d’obtenir antibactérien phénomène par t=5–10s. Nous recommande polihydroxyde chlorure d’aluminium (Kemwater PAX 18) qu’adjuvant pour traitement sonique de l’eau.