| abstract |
(57) Abstract: [PROBLEMS] To provide an improved replenishment method and composition that can remarkably enhance the effect of supplementing nutrients to activated sludge or greatly reduce the amount of nutrients added. SOLUTION: When supplying a nutrient to the activated sludge, a specific water-soluble polymer is added at the same time as or within 3 days before and after the nutrient, and a method of supplementing the nutrient to the activated sludge, and , A nutrient for solid activated sludge, water, and a specific water-soluble polymer, which is a nutrient composition. |