Abstract
This paper shows the oil-oxidizing ability of Micrococcus bacteria isolated from the Nakhodka Bay surface waters of the Peter the Great Gulf, the Sea of Japan. Micrococcus Bacteria are known to be the most active destructors of petroleum hydrocarbons in natural biotopes, contaminated objects. Voroshilova-Dianova liquid containing 2,5% oil or oil products was introduced into sterile penicillin bottles with 105 cells of the investigated bacteria. The ability to destruct petroleum hydrocarbons by bacteria of this genus was studied using a gravimetric method during 30 days. Destruction of oil, gasoline, fuel oil and diesel fuel was shown. Micrococcus bacteria showed a high oil-oxidizing ability and decompose 6599,9% of oil and oil products within 30 days. Gasoline was the source of petroleum hydrocarbons with the greatest ability to utilize this genus of bacteria. The destruction of this hydrocarbons source by bacteria on days 1520 was about 99% of the initial concentration. The lowest ability of destruction by Micrococcus bacteria was revealed for diesel fuel.
Highlights
This paper shows the oil-oxidizing ability of Micrococcus bacteria isolated from the Nakhodka Bay surface waters of the Peter the Great Gulf, the Sea of Japan
Kim Alexandra Vyacheslavovna, postgraduate student of Ecology Department Eskova Alena Igorevna, postgraduate student of Biodiversity and Marine Bioresources Department
Summary
Бактерии рода Micrococcus продемонстрировали высокую нефтеокисляющую способность, разложив 65–99% нефти и нефтепродуктов через 30 суток. Что источником нефтеуглеводородов с наибольшей способностью к утилизации исследуемыми бактериями являлся бензин. Деструкция данного нефтепродукта бактериями на 30 сутки составляла около 99% от начальной концентрации. Наименьшая способность разложения бактериями рода Micrococcus была выявлена для дизельного топлива. Скорость деструкции нефтеуглеводородов бактериями рода Micrococcus является штаммоспецифичной с сохранением высокой степени деструкции нефтеуглеводородов Таблица 1 – Способность штаммов Micrococcus sp. (Н1, Н2) к окислению дизельного топлива, нефти, бензина и мазута на 30 сутки Таблица 1 – Способность штаммов Micrococcus sp. (Н1, Н2) к окислению дизельного топлива, нефти, бензина и мазута на 30 сутки
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