Abstract: The invention described herein provides a novel modification of an aerobic bacterial generator, typically used for sewage wastewater treatment. By providing a pre-filter one creates the equivalent of a “sub-gravel filter” known to the aquarium trade. In such fashion the device is portable and can be placed at the bottom of any pond, lake or other body of water to act as an aeration and biological filtration device. Further the unit incorporates a means of inoculation and maintenance of cultures of beneficial bacteria within the device to improve digestion of organic residues as well as to compete with algae for mineral nutrients, thereby preventing noxious blooms of plant material.

Abstract: A soil-based disposal trench that has failed from a biomat slime is recovered by adding a facultative anaerobic bacteria to an effluent that flows into the disposal trench. The facultative anaerobic bacteria consumes the biomat slime and, in one embodiment, supplants a strictly aerobic bacteria in the soil that converts nitrites to nitrates. As a result, the facultative anaerobic bacteria interrupt the conventional process of nitrification, changing the nitrites to nitrogen gas.