硫酸与H_2O_2快速联合调理对含铁剩余污泥脱水性能的改善  

Improvement of iron sludge dewaterability performance by quick conditioning of sulfuric acid combined with hydrogen peroxide

作　　者：张鹏源 韩永忠[1] 戴荣[1] 

机构地区：[1]南京大学环境学院污染控制与资源化研究国家重点实验室,南京210023

出　　处：《环境工程学报》2017年第5期3142-3147,共6页Chinese Journal of Environmental Engineering

摘　　要：以污泥比阻、污泥含水率为污泥脱水评价指标,研究了硫酸与过氧化氢联合调理含铁污泥对污泥脱水性能的影响。实验结果表明,含铁污泥经硫酸与过氧化氢联合调理后,污泥比阻、污泥含水率显著降低,污泥脱水性能得到明显地改善。进一步研究表明,含铁污泥脱水性能的改善可能与污泥中形成的Fenton/类Fenton反应有关。经过单因素实验,确定了最佳反应条件:5 mol·L^(-1)硫酸溶液投加量1.5 mL,30%双氧水投加量0.25 mL,酸化时间25 min,反应时间2 min。在此条件下,污泥比阻由1.82×10^(13)m·kg^(-1)减少至0.74×10^(11)m·kg^(-1)。脱水污泥含水率由89.15%降低至71.12%。The effect of a sulfuric acid and hydrogen peroxide combination on iron sludge dewaterabitity was in- vestigated. The specific resistance to filtration （SRF）and moisture content of the sludge cake were measured to evaluate the iron sludge dewaterability. The results showed that the sulfuric acid and hydrogen peroxide combina- tion increased sludge dewaterability dramatically. The mechanism for the enhancement of the iron sludge dewa- terability was mainly attributed to a Fenton/Fenton-like reaction. The optimal conditions were as follows： 1.5 mL of 5 mol · L ^-1 sulfuric acid, acidification time of 25 min,0.25 mL of 30% hydrogen peroxide, and reaction time of 2 min. Under these conditions, the SRF and moisture content of the sludge cake decreased from 1.82 ×10^13m·kg^-1 to 0.74 ×10^11m·kg^-1 and from 89. 18% to 71.12% ,respectively.

关 键 词：含铁污泥 脱水 酸化/氧化 铁离子回收 污泥比阻 

分 类 号：X705[环境科学与工程—环境工程]