Purification experiments on ocean sludge by using coagulants and activating microorganisms

Abstract

Ocean sludge exerts a very big environmental load to local sea area. Here, attention was paid to micro-bubble technology for application to the purification of the sludge. The important point in this technique is to activate the bacteria existing in the area by micro-bubbles. We had developed a method for decomposing the sludge by using of microorganisms in an aerobic state by micro-bubble. We had very good results by the method, and also understood that hydrogen sulfide is reduced at first and then the nutrients will be reduced. Here, we have also a technique for purification by using “coagulants”. Therefore, we proposed the experimental way which hydrogen sulfide is reduced at first by using “coagulants” and then the nutrients will be reduced by microbubble and activating microorganisms. Here, we used the detergents including enzyme as the microorganism activator. Our research object in this paper is to check the purification performance for sludge by our proposed experimental way. From the results of our experiments, we succeeded in reducing the time needed to purify the sludge, and we obtained the very good performance.