Observation of Water Purification Process in a Moat by Microbiological Treatment 
Technique

Masaru Mizoguchi 
Faculty of Bioresources, Mie University

Abstract

Sediment degradation and change in water quality have been measured during 
experiment of water purification in a moat by microbiological treatment technique. 
When soil bacteria and an enzyme were injected into the moat, organic matter and 
nutrient salts were liberated from the sediment into the water and transformed. In 
addition, a decrease of sediment by 13 cm was observed during the experiment for five 
months. These results mean that the total environment, including the sediment, was 
purified. The technique may be useful for purifying environment as well as water 
quality in a moat from the viewpoint that the artificial injection of the soil bacteria and 
enzyme degrade sediment in a natural ecological cycle.

Key words: Environment, Water quality, Sediment, Microbiological treatment, 
Eutrophication