摘要
改善污泥的脱水性能有利于污泥的处置与利用,以污泥建材资源化为目标,实验研究了在污泥沉降浓缩阶段加入页岩和粉煤灰后对沉降污泥脱水性能的影响。结果显示单掺页岩或粉煤灰后污泥的脱水性能得到显著改善;污泥比阻从处理前的1013数量级降至1011数量级;污泥脱水后的含水率降低,有利于后续的处理和利用;污泥脱水后的体积有一定程度增大,但这种体积增大在污泥的建材资源化利用方面是可接受的。混掺页岩和粉煤灰后对污泥脱水性能的改善效果优于单掺,页岩与粉煤灰掺量均为5%时,污泥的脱水性能得到最佳改善,且脱水污泥体积无明显增加。
It is beneficial for disposal and utilization to improve the dehydration property of sewage sludge. Aimed at using sewage sludge as building materials, the dehydration property of sludge with adding shale and fly ash in sludge sedimentation process was investigated in this paper. The results indicated that the addition of shale or fly ash could markedly improve dehydration property of sewage sludge. The specific resistance of thickened mixture decreased from 1013 magnitude to 1011. And the moisture content of sludge after settlement and dehydration became low, which was beneficial to the subsequent processing. The volume of sludge after dehydrating was increased, but this increased volume is still acceptable taking into account the utilization of sludge as building materials. The positive effect on dehydration property of sludge with adding both shale and fly ash was better than the one by adding either. And when the dosage of shale and fly ash was respectively 5%, the dehydration property of sludge got best improvement and the volume of dehydrated sludge is not obviously increased.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第10期1437-1441,共5页
Journal of Functional Materials
基金
重庆市科技攻关计划资助项目(CSTC
2011AC7088)
关键词
污泥
页岩
粉煤灰
脱水性能
sewage sludge
shale
fly ash
dehydration property
