静电过滤除尘机组性能的现场测试

JDPL型静电过滤除尘机组是我们根据多年来的理论及实验研究成果而设计的。其在实际运行中的测试结果表明,该机组较普通机组效率提高,阻力降低,清灰效果好。     

Lead removal from water using organic acrylic amine fiber (AAF) and inorganic-organic P-AAF, fixed bed filtration and surface-induced precipitation

Granular porous sorbents were normally used for heavy metals removal from water. To search for the new commercial sorbent and treatment strategy, an organic acrylic amine fiber (AAF) and phosphorus loading inorganic-organic AAF (P-AAF) were prepared and used for lead (Pb) removal from water. A new strategy of inorganic-organic coupling technology was proposed for Pb removal, based on the hypothesis of surface-induced precipitation mechanism. The AAF showed a Pb adsorption capacity of 417 mg/g from the Langmuir fitting, while the column filtration technology was further applied to measure the adsorption edge and applications. Effects of different initial Pb concentrations, hydraulic retention time, and co-existing P were considered in the filtration experiments. The presence of 0.8 mg/L P in water significantly improved the Pb breakthrough point from 15,000 to 41,000 bed volumes of water spiked with 85 µg/L Pb, while the P-AAF fixed bed showed better removal of Pb than AAF SEM/EDX and XRD spectra were employed for determining the surface functional groups and the formation of surface-induced precipitation of pyromorphite (Pb₅(PO₄)₃OH) on AAF. This study verified the application of AAF sorbent for Pb removal and the enhanced effect of coating P on AAF, thus improved our fundamental understanding and application of the surface chemistry process of Pb with P.     

改善污泥脱水性能的丝状真菌的分离及其促进污泥脱水的机制初探

探讨污泥中丝状真菌对污泥脱水性能的影响及其机制,对生物法强化污泥脱水技术的发展具有重要意义.本研究从剩余污泥中分离筛选可以提高污泥脱水性能的丝状真菌,并分析其改善污泥脱水性能的具体机制.结果表明,在剩余污泥中存在着可以促进污泥脱水性能改善的丝状真菌,从中分离筛选出1株毛霉属的真菌Mucor circinelloides ZG-3,该菌对改善污泥脱水性能具有良好的效果.该丝状真菌处理剩余污泥过程中污泥的脱水性能改善效果主要受到接种方式、接种浓度和污泥含固率的影响,其最适接种方式为菌丝体接种,最适接种浓度为10%,最适污泥含固率约为4%.在最适条件下处理污泥可使污泥比阻降低75.1%,显著改善污泥的脱水性能,并且处理后污泥溶液的COD值约为310 mg·L-1,处理后的污泥仍具有良好的沉降性能.M.circinelloides ZG-3处理剩余污泥过程中,污泥脱水性能的改善主要与污泥胞外聚合物(EPS)的降解和污泥p H的降低有关.因此,采用M.circinelloides ZG-3处理剩余污泥是一种非常有潜力的新型污泥调理技术.     

静电纺丝过氯乙烯纳米纤维膜对PM10去除效果的研究

静电纺丝纳米纤维膜是一种新型空气净化过滤材料.为了解该材料对PM₁₀的去除效果,以滑石粉粉尘和香烟烟雾为代表研究了静电纺丝过氯乙烯纳米纤维膜对PM₁₀的去除率.结果表明:供试的2类静电纺丝过氯乙烯纳米纤维膜对粉尘的平均去除率分别为93.2%和97.8%,明显高于同类非静电纺丝纤维过滤材料的去除效果;对香烟烟雾有一定的去除效果,4 h的去除率为82.4%.静电纺丝过氯乙烯纳米纤维膜对PM₁₀的过滤作用主要发生在表层,过滤机理以拦截和惯性碰撞为主.