The disinfection of water from Diplococcus, S.lutea, B.cereus, and Ps.fluorescens bacteria types and the yeast Sacch.cerevisiae via the joint action of gas/US has been investigated. The investigated microorganisms were identified in natural water and wastewater in dominant amounts. The relative ranges of effective cell destruction by combined gas/US action have been established. The most efficient microorganism destruction has been obtained using Ar/US compared to Не/US, СО 2 /US and О 2 /US and is accounted for by those gas properties able to affect sonochemical activity.

Push-pull vibratory electromagnetic cavitator of resonance action consists of two electromagnets, an elastic system connecting their stators and anchors, and two cavitation breakers located in the flowing liquid in the form of soundboards with holes which fluctuate in antiphase. High degree of biological disinfection of water with the productivity of approximately 3.5 m 3 /h at its continuous supply is provided due to the combination of magnetic and cavitation effects.

Наведено опис конструктивної будови автономного вібраційного кавітатора для аерації води відкритих водойм та інактивації її біологічних забруднень, зокрема і ціанобактеріями, які провокують "цвітіння" води. Його основними елементами є встановлена на пневмобалоні платформа із віброкавітатором та пневмокамерою і занурені у воду збурювачі кавітації. Продуктивність очищення забрудненої води -10÷150 м 2 водного плеса мілководдя за 8÷10 годин роботи від автономного джерела живлення. Пристрій високопродуктивний, маневрений, придатний для ефективної боротьби із заморами риби у відкритих біологічно забруднених, зокрема і цитобактеріями, водоймах, не залежний від стаціонарних джерел живлення.Ключові слова: вода, біологічне забруднення, кавітація, електромагніт, пневмобалон, платформа. 1 доц. Л.І. Шевчук, д-р техн. наук -НУ "Львівська політехніка"; 2 асист. О.І. Строган, канд. техн. наук -НУ "Львівська політехніка"; 3 асист. І.З. Коваль, канд. техн. наук -НУ "Львівська політехніка"; 4 аспір. Т.С. Фалик -НУ "Львівська політехніка" Науковий вісник НЛТУ України. -2016. -Вип. 26.4 2. Екологія та довкілля Shevchuk L.I., Strogan О.І., Koval I.Z., Falyk T.S. Vibrocavitator for Water Disinfection of Opened ReservoirsThe description of the constructive structure of autonomous vibratory cavitator for water aeration of reservoirs and inactivation of its biological contaminants, including cyanobacteria, which cause water blooms has been presented. Its main elements are the platform mounted on an air cylinder with vibrocavitator and air chamber, and cavitation breaker immersed into the water. The productivity cleaning of contaminated water is 100÷150 m 2 of shallow stretch of the water for 8÷10 hours of autonomous power source. The device is considered to be high-performance, manevrenen, and suitable for effectively combating fish kills in open biologically contaminated, including Citrobacter, reservoirs, independent of stationary power sources.

No abstract

Kinetics of microorganisms accumulation (the first stage) and destruction (the second stage) in water dispersion in the air atmosphere and at bubbling of oxygen, argon and helium has been investigated. The accumulation of microorganism takes place in oxygen and in the air atmosphere at the first stage. The microorganisms destruction was observed at bubbling of the system by argon, helium during the whole process, however, in the air atmosphere and oxygen -in the second stage. Mathematical model of these two processes was elaborated and the rate constants of microorganisms destruction and propagation were calculated.