助滤剂在污泥脱水中的应用研究进展

Research Progress on Application of Filter Aid in Sludge Dewatering

污泥脱水在污泥减量化处理、资源化利用、提高经济效益等方面发挥着重要的作用。由于污泥中含有大量的微生物及菌胶团,导致其脱水极其困难,未经预处理的污泥甚至无法脱水。助滤剂因其低压缩性的特点,被广泛应用于污泥的脱水过程。助滤剂通过和污泥胶体之间存在的相互作用,构成管网效应和层间通道效应,形成具有较强的多孔结构的固体均匀混合物,进而提高污泥脱水效率。本文主要阐述了国内外助滤剂在污泥脱水中的应用,为污泥的高效脱水提供了一定的理论指导。

Sludge dewatering plays an important role in sludge reduction and treatment,resource utilisation and economic efficiency.Due to the large number of microorganisms and bacteriological clusters in sludge,it is extremely difficult to dewater it and even impossible to dewater sludge without pre-treatment.Filter aids were widely used in the dewatering process of sludge due to their low compressibility.Through the interaction between the filter aid and the sludge colloid,it constituted a tubular network effect and an interlayer channel effect,forming a homogeneous mixture of solids with a strong porous structure,thus improving the efficiency of sludge dewatering.The application of domestic and international filter aids in sludge dewatering was focused and some theoretical guidance were provided for efficient dewatering of sludge.