选用螺蛳为模拟实验生物, 利用其摄食污泥的特性, 考察了不同环境条件下的摄食率及污泥减量效果, 从而实现污泥减量化的目的. 结果表明, 螺蛳的污泥减量速率随投放量和初始混合液悬浮固体浓度(mixed liquid suspended solids, MLSS)的升高而呈上升趋势. 通过模拟不同生存环境(高氧、低氧)的实验对比表明, 在溶解氧(dissolved oxygen, DO)充足的条件下螺蛳具有良好的污泥减量效果. 螺蛳对MLSS、混合液挥发性悬浮固体浓度(mixed liquor volatile suspended solids, MLVSS)的去除率可分别达到40.01%, 47.54%, 符合污泥稳定化的要求.
Bellamya Quadrata was selected as the experimental organism during the sludge reduction process. Its predation ability of sludge was used to reduce sludge. Various reaction factors were investigated, including the amounts of Bellamya Quadrata, feeding rate, feeding time and the initial MLSS (mixed liquid suspended solids). The results indicate that the sludge reduction rate increases with the increase of MLSS and addition of Bellamya Quadrata. Different survival environments contrast experiments indicate that, with enough DO (dissolved oxygen), the result of sludge reduction is satisfactory. Reduction rates of MLSS and MLVSS (mixed liquor volatile suspended solids) are 40.01% and 47.54% respectively, meeting the requirements of sludge stabilization.
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