活性炭活化过硫酸盐氧化剂提升污泥脱水性能研究

PROMOTING DEWATERABILITY OF WASTE ACTIVATED SLUDGE BY ACTIVATED CARBON ACTIVATED PERSULFATE OXIDATION

采用废弃活性炭和K2S2O8对污泥进行预处理,发现不同配比的活性炭和K2S2O8可以破坏污泥结构,增强污泥脱水性能。当污泥中加入1.00 g/g VS活性炭和1.60 mmol/g VS S2O82-,反应20 min后进行抽滤实验,污泥经过60,120,180,240,300 s抽滤,失水量分别为(4.95±0.05),(6.65±0.15),(7.45±0.05),(7.90±0.10),(7.90±0.01)g;相比原始污泥,在相同时刻下,失水量分别上升了32.00%、20.91%、19.20%、17.04%和16.18%;抽滤后泥饼含水率为(62.63±1.09)%,相较原始污泥泥饼,含水率下降了19.97%。说明活性炭和K2S2O8可以大大提高污泥脱水性能,加快污泥脱水速率,降低泥饼含水率。在工业应用中,活性炭和K2S2O8具有成本低廉的优势,用于污泥脱水可降低污泥预处理费用,节约成本。同时,高效的污泥处理可降低污泥综合处理以及后续处置成本。

Waste-activated carbon and K_2S_2O_8 were used to pretreat sludge,and different proportions of activated carbon and K_2S_2O_8 could destroy the sludge structure and enhance the sludge dewatering performance.When 1.00 g/g VS activated carbon and 1.60 mmol/g VS S_2O_8~(2-)were added into the sludge,the sludge was filtered for 60,120,180,240,300 s after reaction for 20 min.The water loss was(4.95±0.05),(6.65±0.15),(7.45±0.05),(7.90±0.10),(7.90±0.01)g,respectively.Compared with the original sludge,the water loss at the same time increased by 32.00%,20.91%,19.20%,17.04%,and 16.18%,respectively.The moisture content of the sludge cake was(62.63±1.09)%,which was 19.97%lower than that of the original sludge cake.These results showed that activated carbon and K_2S_2O_8 can greatly improve the sludge dewatering performance,accelerate the sludge dewatering rate,and reduce the moisture content of the mud cake.In industrial applications,activated carbon and K_2S_2O_8 have the advantage of low cost.When used for sludge dewatering,they can reduce sludge pretreatment costs,and an efficient sludge treatment effect can reduce sludge comprehensive treatment and subsequent disposal costs.