The digestion degrees of the night soil which was taken from a night soil processing plant have been measured in a bubble column according to dilution ratios, aeration velocities, digestion time, and hole area ratios of distribution plate. Digestion d...
The digestion degrees of the night soil which was taken from a night soil processing plant have been measured in a bubble column according to dilution ratios, aeration velocities, digestion time, and hole area ratios of distribution plate. Digestion degrees increased with increasing dilution ratios and aeration velocities, and they increased with decreasing hole area ratios of distribution plate. The surface tension measurement method for digestion degree gave high accuracy than BOD measurement method. We suggested the estimated digestion degree equations according to various experiment conditions.