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.
PROMOTING DEWATERABILITY OF WASTE ACTIVATED SLUDGE BY ACTIVATED CARBON ACTIVATED PERSULFATE OXIDATION
Waste-activated carbon and K2S2O8 were used to pretreat sludge,and different proportions of activated carbon and K2S2O8 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 S2O82-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 K2S2O8 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 K2S2O8 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.
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